Duratrax Raze User Manual

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Page 1

ASSEMBL

Y AND OPERA

TION MANU

™

www

.duratrax.com

™

Page 2

YYOU

WILL

NEED

WRENCH

DTXR1170

SPARE GLOW PLUGS

DTXG3005

PHILLIPS HEAD SCREWDRIVER

DTXR0124

20% O’DONNELL FUEL

ODOP3520

PLIERS

DTXR0300

ALKALINE BATTERIES

AIR FILTER OIL

DTXC2465

ITEMS

INCLUDED

The following items are included in the box.

Chassis Body Body Clips (Qty 2) Decal Sheet Transmitter Transmitter Antenna Receiver Antenna Tube

250 cc Fuel Bottle 2° and 3° Toe-Blocks Ride Height Clips Glow Starter Instruction Manual Exploded View/Parts Listing Engine T uning DVD

ENGINE TUNING

SCREWDRIVER

DTXR0185

AFTER RUN OIL

HCAP3000

Page 3

SAFETY PRECA

UTIONS

When the safety precautions are follow ed, the Raze will provide years of enjoyment. Use care and good sense at all times when operating this radio controlled buggy. Failure to use this vehicle in a safe, sensible manner can result in injury or damage to property.You and you alone must insure that the instructions are carefully followed and all safety precautions are obeyed.

• Do not operate the Raze near people. Spectators should be behind the driver or at a safe distance away from the vehicle.

• Water can cause the electronics to short out and can cause permanent damage.

• Always turn on the transmitter before turning on the receiver.

• Fully extend the transmitter antenna before operating your vehicle.

• Before turning on your radio system, check to make sure that no one else is running on the same frequency.

• The engine and exhaust produce quite a bit of noise.Do not run this vehicle when or where it can disturb others.

• The engine and exhaust can become very hot. Avoid touching any of these parts during use and until they have cooled down.

• Model engine fuel is poisonous. Make sure you read and follow all of the precautions on the fuel container. Keep fuel out of the reach of children.

• Model engine fuel is flammable and when ignited has a flame that is difficult to see. Avoid sparks, flames, smoking, or any other ignition source when fuel is near.

• The engine emits harmful fumes just like real vehicles. Do not operate this model indoors.

• Av oid running the buggy in cold weather . The plastic and metal parts can become brittle at low temperatures. In addition, grease and oil become thick, causing premature wear and poor performance.

SPECIFICA

TION AND

DESCRIPTION CHANGES

All pictures, descriptions and specifications found in this instruction manual are subject to change without notice.DuraTrax maintains no responsibility for inadvertent errors in this manual.Visit www.duratrax.com for the latest updates and information for your model.

WWARRANTY

ARRANTY

• DuraTrax®guarantees this kit to be free from defects in both material and workmanship at the date of purchase. DuraTrax will warranty this kit for 90 days after the purchase date. DuraTrax will repair or replace, at no charge, the incorrectly made part.

• Make sure you save the receipt or in v oice you were given when you bought your model! It is your proof of purchase and we must see it before we can honor the warranty. Further, DuraTrax reserves the right to change or modify this warranty without notice.

• In that DuraTrax has no control over the final user assembly or material used for final user assembly, no liability shall be assumed nor accepted for any damage resulting from the use by the user of the final user-assembled product.By the act of using the user-assembled product, the user accepts all resulting liability.

To return your Raze for repairs cov ered under warranty you should send your buggy to:

Hobby Services

3002 N. Apollo Dr ive Suite 1

Champaign, Illinois 61822

Attn: Ser vice Department

Phone: (217) 398-0007 9:00 am-5:00 pm

Central Time M-F

E-mail:

hobbyservices@hobbico.com

www.hobbyservices.com

If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to return this kit immediately in new and unused condition to the place of purchase.

STRESS-TECH

™

PPARARTS

GUGUARANTEE

ARANTEE

We have engineered the Raze to take the rough and tumble abuse that makes R/C buggies fun.We are so confident of the quality and durability of the Stress-Tech plastic parts that we will replace any Stress-Tech plastic part you break during the first 12 months you own the buggy.Just send in the part to us and we will send you a FREE replacement. Please see the Raze parts list for the items covered under the Stress-Tech guarantee.

To receive your free replacement part please send the following to the Hobby Services address listed under the warranty on the left.

❏ 1.The broken part must be included. ❏ 2.The part number and description of

the broken part.

❏ 3. Copy of your dated invoice or

purchase receipt.

❏ 4.Your name, phone number and

shipping address.

REP

AIR SER

VICE

Repair service is available anytime.

• After the 90 day warranty, you can still have your Raze repaired for a small charge by the experts at DuraTrax’s authorized repair facility, Hobby Services.

• To speed up the repair process, please follow the instructions listed below.

❏ 1. Under most circumstances return the

ENTIRE vehicle. The exception would be sending in a Stress-Tech part. See the instruction under the StressTech Guarantee.

❏ 2. Make sure the transmitter is turned off,

all of the batteries are removed and the fuel tank is completely empty.

❏ 3. Send written instructions which include:a

list of all items returned, a THOROUGH explanation of the problem, the service needed and your phone number during the day. If you expect the repair to be covered under warranty, be sure to include a proof of date of purchase (your store receipt or purchase invoice).

THINGS

THINGS TTOO

KNO

Page 4

FINISHING

THE RAZE

• Remove the receiver battery cover from the receiver case.

• Remove the receiver battery holder from the receiver cover.

• Install (4) “AA” batteries.

• Reinstall the receiver battery holder to the cover using the included tie-strap.

• Secure the receiver cover to the receiver case.

• Install eight “AA” batteries into transmitter, making sure the polarity is correct.

• Insert the antenna into the top of the transmitter and tighten.

• Turn the transmitter on and check the battery light.

• If both LED’s light up, the batteries are acceptable. If only the red LED lights up, immediately replace the batteries.

TRANSMITTER PREPARATION

RECEIVER BATTERY INSTALLATION

Page 5

• Uncoil and straighten the antenna wire.

• Route the receiver antenna wire through the antenna tube.

• Install the tube into the antenna mount.

• Install the antenna cap onto the top of the antenna tube to hold the assembly in place.

• The air filter comes pre-oiled.However, after runs in dusty conditions, clean and re-oil the foam element.

• Remove the air filter top and foam element.

• Clean the foam using soap and water.

• Apply air filter oil (DTXC2465) onto the foam element, squeezing the element until it is completely coated with the oil. TIP! Placing the element in a plastic bag will help keep your hands clean.

• Remove any excess oil with a paper towel.

• Reinstall, making sure the filter is properly seated on the base.

RECEIVER ANTENNA INSTALLATION

• Install a “C” batter y (not included) into the glow starter.

GLOW STARTER BATTERY

AIR FILTER MAINTENANCE

Page 6

RADIO SYSTEM CHECK

• Fully extend the transmitter antenna.

• Turn the transmitter on, then turn the receiver on.

• Turn the transmitter wheel to the right—the front wheels should turn to the right. If not, move the steering servo re v erse switch.

• When running, adjust the steering trim so the buggy tracks straight.

• Pull the throttle trigger to make sure the carburetor opens fully and the throttle linkage functions properly without binding.

• Adjust the throttle trim until the carb is at the idle position. Always adjust idle speed with the idle stop screw on the carb, not the throttle trim.

• Push the trigger and roll the buggy to make sure the brakes are applied.

• Decal the body to your liking. Use the photos on the box as a reference.

• Install the body onto the chassis using two body clips.

BODY INSTALLATION

Page 7

HIGH-SPEED NEEDLE

The “high-speed” needle is sticking up from the carburetor. This controls the fuel to air mixture of the carburetor . The needle is

pre-set for break-in from the factory at 4-1/2 turns out from fully closed.Once

the engine is broken-in, the high-speed needle would typically run from 4 to 4-1/4 turns out from closed, depending on the weather, humidity and altitude above sea level. To richen the mixture turn the needle counterclockwise.To lean it, turn the needle clockwise.

LOW-SPEED NEEDLE

The “low-speed” needle is located on the side of the carburetor. It controls the fuel mixture at low throttle settings/idle and is preset from the factory at 12-1/2 turns from fully closed while holding the carburetor open.There is a simple way of adjusting the low-speed needle correctly called the “pinch test.” With the engine at idle, pinch the fuel line and listen to how the engine speeds up or slows down. If the engine increases its speed for about 2 or 3 seconds and then loses speed, the needle is set correctly. If the engine loses RPM quickly, it is set too lean and the low-speed needle needs to be opened (counterclockwise) to richen the mixture.Pinch again to check the mixture.If the engine takes longer than 4 seconds to slow down, lean (clockwise) the low-speed needle and then pinch again to check the mixture.

IDLE STOP SCREW

The “idle stop” screw is located on the backside of the carburetor .This increases or decreases the idle speed without changing the fuel mixture.The barrel should be approximately 1mm from fully closed.

IMPORTANT!To insure long life and good performance from your engine, you MUST break-in the engine. The break-in period is critical for long life of the internal parts of the engine.This should be done over the first 5 tanks of fuel.

Before running the engine,read the manual and watch the assembly and engine tuning video that came with this kit.

ST ARTING THE ENGINE

IMPORTANT! Your radio system must ALWAYS be turned

on and the transmitter antenna fully extended when running the engine!

1. Fill the fuel tank.

2. Prime the engine - while the engine is cool, place your

finger over the tuned pipe’s exhaust hole and pull the recoil gently several times. Do not over-prime! Stop when you see fuel in the fuel line at the carb.

3. Install a “C” alkaline into the glow starter and attach the starter to the glow plug.

4. With the throttle at idle, start the engine by pulling the recoil using short, quick pulls. DO NOT pull the recoil starter’s string to the end.You only need 10 to 12 inches of pull to start the engine with the throttle at idle.

Sometimes it is helpful to start the engine at around half throttle. When the engine starts, immediately return the throttle to idle.If this is not done the engine can over-rev and cause engine damage.

IMPORTANT! FIXING A FLOODED ENGINE

If the engine is difficult to turn over with the recoil starter, especially if it is brand new, loosen the glow plug a half turn before starting the engine.This allows some compression to escape, but the engine will still start. Make sure you tighten the glow plug after the engine starts. If the recoil starter is still difficult to pull, the engine is flooded - there is too much fuel inside the engine.Remove the glow plug, then turn the buggy upside down and pull the recoil 5 or 6 times.This will clear the engine of fuel, and you will notice the recoil pulls easier. Replace the glow plug and repeat the starting procedure.

STOPPING THE ENGINE

Pinch the fuel line that runs to the carburetor.Pinching this line will restrict the fuel flow and the engine will quit within a few seconds.Never place your finger over the exhaust to stop

the engine. This could result in serious burns on your finger.It also causes fuel to back up in the engine,making it harder to start the next time you run your Raze.

RRUNNING

UNNING

THE

ENGINE

TUNING GUIDE

Page 8

SOME THINGS TO REMEMBER DURING BREAK-IN

1. Run with the body off.This will keep the engine cooler.

2. Keep the air cleaner on at ALL times

3. Run on a smooth, hard surface. An empty parking lot

is perfect.

4. Use the same fuel that you will use for normal running.

5. Resist the urge to accelerate and decelerate quickly.

6. Break-in puts stress on the glow plug and can burn it out.

Make sure you have an extra plug or two on hand.

7. Do NOT ov erheat the engine (see page 9).Y ou can chec k the head temperature by using one of the temperature gauges that are readily available (Dur aTrax™Flashpoint, DTXP3100).

TANK 1

Your first tank of fuel should be r unning the Raze at a very rich needle valve setting. This allows the fuel to carry as much oil as possible into the engine to properly lubricate the internal parts dur ing the break-in.

1. Open the high speed needle valve 4-1/2 turns from fully

closed (counterclockwise).This is factory set already, but check it to make sure. When closing the high-speed needle, close until you feel some resistance. DO NOT overtighten or you will damage the engine.

2. Fill the fuel tank and star t the engine.

3. Run the buggy on a smooth surface with the body off.

4. Run back and forth at medium speeds, slowly accelerating

and decelerating the buggy.

5. Run the buggy until the tank is almost out of fuel. Do not

allow the tank to run out of fuel during break-in. This leans out the engine and can cause overheating.

6. Stop the engine and allow it to cool. This normally takes

around 10-15 minutes.

NOTE: If your engine does not stay running consistently, increase the idle speed by turning the idle stop screw clockwise.

TANK 2

Lean the high-speed needle 1/12 turn from “tank 1” setting. Run the buggy for the complete tank and then let cool.

TANK 3

Lean the high-speed needle another 1/12 turn from “tank 2” setting. Run the buggy for the complete tank and then let cool.

TANK 4

Lean the high-speed needle another 1/12 turn from “tank 3” setting.Run the buggy for the complete tank and then let cool. You should notice the engine running much better at this point.

TANK 5

Lean the high-speed needle another 1/12 turn from “tank 4” setting. Run the buggy for the complete tank and then let cool.The engine is now ready to be performanced tuned.

Important! At this point, the engine will likely be running at a faster idle speed than needed (This is typical after breakin).Adjust the idle stop screw to lower the idle speed so that the wheels do not, or just barely, rotate when you lift the buggy off the ground.

TUNING TIPS

After break-in, run the buggy where you plan to do most of your driving (grass, street, track, etc). Tune the high speed needle so the engine makes good power without overheating. Using a temperature gauge, tune the engine so that it will consistently stay under 270° F (132° C). Keep in mind, RC engines usually take a minute or two to warm up.It is common not to reach full power right away. Never tune a cold engine!

If needed, tune the low speed needle so that the buggy idles and accelerates smoothly and consistently. Note: You may sometimes experience “run-on” when running the buggy. “Run-on” is when the engine does not drop back down to idle after the trigger on the transmitter is released.To correct this, richen the low-speed needle using 1/8 turn increments until the engine idles normally when the trigger is released.

ENGINE CARE

Never store your Raze with fuel in the tank. We recommend that after the final run of the day, you empty the fuel tank and then run the engine at idle until all the fuel is out of the fuel lines and engine. Remove the air filter and glow plug. Then place two drops of Hobbico®After Run Engine Oil (HCAP3000) in the carburetor and two into the cylinder to help prevent corrosion.Pull the recoil a few times to circulate the oil.

10 WAYS TO ENSURE LONG LIFE FROM YOUR ENGINE

1. Keep your engine and air filter clean. Dirt will act as

insulation on an engine. It will not be able to shed heat as easily. Clean and re-oil the element often.

2. Do not over-lean your engine.

3. Do not run your engine with little or no load. Don’t throttle

up the engine to full throttle when the wheels are not in contact with the ground.

4. Do not overheat the engine (see page 9).

5. Do not use a fuel with a low oil content. Make sure you

use a model car fuel from a reputable manufacturer, such as O’Donnell Fuels.

6. Avoid using old fuels in the engine.

7. Do not use a fuel with a nitromethane (often called nitro)

content over 20%.

8. Do not scratch the piston or cylinder sleeve. Avoid jamming something into the exhaust port when removing or re-installing the clutch or flywheel. Use a special tool called the Ultimate Flywheel Wrench (DTXR1105) to keep the crankshaft from moving.

9. Do not use silicone sealer on the engine joints. Silicone sealer contains acetic acid, which is corrosive if it gets inside your engine.

10. Do not allow any water to get inside the engine.This sounds

easy, but temperature changes can cause condensation inside the engine.This is a good reason to use an after-run oil. Store your engine inside the house, not in a garage or shed where there will be temperature extremes.

BREAK IN

OCEDURE

Page 9

GLOW PLUG

The glow plug is an item that will wear out and need replacement from time to time.It is a good idea to remove the glow plug before your first run, connect the plug to the glow starter and see how well it glows. You should see a bright orange glow from the filament.If a coil or two will not glow or the plug will not glow at all, replace the plug.If the engine quits when you remove the glo w starter, the plug might need to be changed, although this may be because you are running too rich and need to lean your highspeed needle. Look at the glow plug when you are running the engine.If you see some bubbles coming from around the plug, replace the glow plug.The only real way to test a glow plug is to replace it. Make sure you have a spare plug or two on hand every time that you run the Raze. We recommend the DuraTrax Gold Plug (DTXG3005).

AIR FILTER

Dirt can get into your carburetor and engine through the air filter. Ensure that your air filter has a good seal to the top of the carburetor. Periodically wash the air filter foam element (using dish soap and water) and re-oil the filter with filter oil (DTXC2465).Any air filter that has a torn element or a bad seal should be replaced immediately.

FUEL

Use fuels that are specially formulated for car and buggy engines like O’Donnell 20% RTR Fuel (ODOP3520).

Fuel can go bad. The main ingredient in model fuel is methanol, which is basically alcohol. Alcohol will absorb water out of the air, so k eep y our fuel jug capped at all times . Store your fuel out of the sunlight and in a cool place, off the ground away from temperature extremes.Bad fuel is one of the most difficult problems to diagnose in engines.If you have tried ev erything you can think of to remedy an engine that is not running correctly, try using some fresh fuel.

FUEL SYSTEM

The fuel line is susceptible to pinhole leaks. You usually cannot see the hole in the fuel line, but if you see air bubbles in the line going to the carburetor, replace the fuel line. Another symptom of a leak in the fuel line is a surging engine. A properly tuned engine will surge when the air bubbles hit the carburetor. It is basically leaning out the mixture.

Dirt can get caught in the needle seat and cause an inconsistent running engine.If you suspect that some dirt has lodged itself in the carburetor, remove the needles and clean the carburetor with denatured alcohol or fuel. It can help to use compressed air to blow out the fuel passages as well.

OVERHEATING

One of the worst things you can do to your engine is overheat it.The oils that lubricate the engine are carried in the fuel. If your engine is set too lean, there will not be enough oil in the engine to lubricate the internal par ts. This will cause premature wear in the engine and cause damage. The easiest way of checking the temperature of the cylinder head is by using one of the available temperature gauges (we recommend the DuraTrax Flashpoint Temperature Gauge, DTXP3100).This will give you a direct reading of the cylinder head temperature. Hold the temperature gauge directly on the cylinder head so the gauge is pointed directly at the glow plug. Do not let the head temperature exceed 270° Fahrenheit (132° Celsius).

GENERAL

INFORMA

TION

Page 10

BEFORE EACH RUN

1. IMPORTANT: Check to make sure

that all screws are tight. Always use threadlock (DTXR2010) on screws going into metal.

2. Before running always check the condition of your radio system batteries and replace/recharge if necessary.

3. Check to make sure that all of the moving parts of the Raze move freely and do not bind.

4. Check the fuel tank and fuel lines for leaks.

5. Before starting the engine, turn on the radio and make

sure the servos move easily and in the proper direction.

6. Inspect the air filter f or a torn or damaged element.Also look

for dirt in the air cleaner element and wash it if necessary.

7. Check for broken or damaged parts. Replace any broken or damaged parts before running the Raze. Running of the Raze with broken or damaged parts could result in damage to other parts.

8. Check to make sure that all wires are properly connected.

AFTER EACH RUN

1. Clean any large globs of dirt or debris from the chassis

and moving parts.

2. Drain the fuel tank of any leftover fuel.DO NOT return the fuel to your fuel jug.

3. Check for any broken or damaged parts. This way parts may be replaced before the next run.

4. Put 2 drops of after-run oil in the carburetor and 2 drops in the cylinder (removing the glow plug to access the cylinder) and turn the flywheel several times to work the oil into the engine. This will protect the engine from rusting, especially when stored for a long period of time.

AFTER EVERY 10 RUNS

1. Check to make sure that the bearings are free of dirt and

debris, and roll smoothly.

2. Check the shocks for oil leakage. Inspect the shaft and O-rings for damage and replace if necessary. (A shock shaft with scratches you can feel with a fingernail should be replaced.)

3. Make sure the servo sa ver is free mo ving and does not bind.

This will help prevent stripping of the servo during running.

4. Check f or proper gear mesh between the spur and clutch bell.

When tuning the Raze make sure that you have equal lengths from one side to the other on the shocks, camber rods and steering rods. Also, make sure to have the shock pre-load adjusters at the same setting from left to right.They do not have to be the same front to rear.

CAMBER

Camber refers to the angle at which the tire and wheel ride in relation to the ground when viewed from the front or rear. Negative camber is when the wheels lean inward and positive camber is when the wheels lean outward. Usually adding a small amount of negative camber (0° to -2°) will increase traction. However, adding too much camber will decrease traction. The objective is to keep as much of the tire as possible in contact with the running surface. Never put in positive camber. Make sure that both sides are equal.

Use the DuraTrax Pit Tech

™

Camber Gauge (DTXR1145) to accurately set up your Raze.

ROLL CENTER ADJUSTMENT

Install the inner upper arm in the lower position for high-traction surfaces and in the upper position for low-traction surfaces.

TUNING

GUIDE

MAINTENANCE

TIPS

Page 11

TOE-IN AND TOE-OUT

Toe-in is when the fronts of the tires point towards each other.Toe-in increases stability dur ing acceleration and high speed. However, toe-in also decreases steering when entering a corner.Toe-out will increase steering into corners, but will decrease the over all stability during acceleration.The front typically is set-up with 0° to –2° of toe-in. Toe-out is when the fronts of the tires point away from each other.

Rear toe-in affects the traction of both the front and rear of the buggy. Rear toe-in increases the amount of traction in the rear, but decreases steering. Decreasing rear toe-in will increase steering, but will give less rear traction. The Raze comes with 2° and 3° rear toe-in blocks.

RIDE HEIGHT

The Raze shocks use preload clips to adjust the buggy’s ride height. By adding the included preload clips to the shock, the buggy’s ride height will increase. Removing the preload clips will lower the ride height.T ypically, a good place to start is with the ride height set so the dogbones are parallel to the surface.

FRONT SHOCK ADJUSTMENT (IN AND OUT)

Moving the tops of the shocks out will increase steering resulting in quicker reaction. Moving the tops of the shocks in will result in slower steering reaction, but will be smoother over bumps. Mounting the bottoms of the shocks in the inside holes will give more slow speed steering but will take away some high speed steering.

REAR SHOCK ADJUSTMENT (IN AND OUT)

Moving the tops of the shocks in will result in more traction in the corners and will be smoother over the bumps.Moving the tops of the shocks out will give the buggy more steering and handle large jumps better.

SHOCK OILS AND SHOCK SPRINGS

Many different combinations can be used between the shock oils and shock springs. Some basic guidelines when setting up the Raze are that if the rear end is stiff it will give the buggy more steering and have less rear traction. Stiffening the front will result in less steering and more rear traction. Changing the shock pre-load adjusters results in ride-height change only. It does not change the spring tension. Optional springs are available to tune your Raze. See our website (www.duratrax.com) for a complete listing of optional parts.

Thinner shock oil makes the shocks react faster which works well on rough tracks, but makes the buggy less stable and may cause the buggy to bottom out ov er large jumps .Thicker shock oil makes the buggy smoother o v er large jumps and in straights, but less reactive over rough sections.

DIFFERENTIAL OIL/GREASE

The Raze comes with sealed differentials filled with medium grease.You can tune the buggy by changing the oil/grease either heavier or lighter.

• For loose track conditions, use a lighter oil/grease. For high traction conditions, use a thicker oil/grease.

• For more pull in the corners, use a thicker oil in the front than in the rear.

• To reduce steer ing and increase overall forward traction, use a thicker oil in the rear than in the front.

Page 12

MAINTENANCE

GUIDE

The following section is provided to help you with maintenance and repairs to your Raze.Pa y extra attention to the notes and tips for proper assembly.

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DTXZ1097 for DTXD76**

ENGINE

OUBLESHOO

TING