Honda XR400, XR250 Service Manual cap 2-3
Specifications and Main Features
- Torque for Mufflers installing bolt is estimated to be: 32 Newton meter or (24 lbf-ft)
- Torque for Muffler clamps is set at: 20 Newton meters or (14 lbf-ft)
- Torque for Exhaust pipe protectors installing bolts is estimated at: 12 N m (9 lbf-ft)
- Torque for exhaust pipe joint nut is set at 10 N m Or (7 lbf-ft)
- Spark arresters estimated torque: 2.2 N-m (1.4 lbf-ft)
- Throttle grip has a free play of: 2-6 mm
- Spark plug type: NGK NIPPONDENSO Standard CR9EH-9 U27FER9 but in cold weather (5°C/41°F) use CR8EH-9 U24FER9
- Spark plug gap is set at: 0.8 to 0.9 mm
- Valve clearance (IN) = 0.10 + 0.02 mm, (EX) = 0.12 + 0.02 mm
- Draining of Engine oil reaches a capacity of: 1.3 liter
- Disassembly of the engine reaches oil capacity of 1.7 liters
- Replacing oil filter results in oil capacity of: 1.4 liter
- Recommended oil type: API service Classification SF or SG with Viscosity of SAE 10W 40 or 20W 50
- Slack for Drive chain is set at 30 to 40 mm
- Length of the drive chain: ED and DK variants Achain length of 1,659 mm (65.3 in) while the U type has a length of 1,611 mm (63.4 in).
- The replacement type of drive chain is D.I.D. 520VC5 along with RK 520MOZ9.
- The type of brake fluid recommended is DOT 4.
- For ED and DK models the front tire has the measurement of 80/100 − 21 51M and a tire pressure of 100 kPa (1.0 kgf/cm², 15 psi) while the rear tire’s measurement is1130 – 1140 kPa (11.5 – 12.0 kgf/cm², 163 - 165 psi).
- The required tire sizes for the DK types are as follows Front: 80/100-21 51M, and a Rear: 100/100-18 59M.
- For U type, Front measurement is 3.00 which has a weight of 21 51P, and for the rear it is 4.00 - 18 64P.
- Cylinder compression that is affected by the decompressor will have its range set between: 637 - 735 kPa (6.5 - 7.5 kgf/cm², 92 - 107 psi).
- Compression in the cylinder that is unaffected will be set at a range of 1177 - 1275 kPa which equals to (12.0 – 13.0 kgf/cm², 171 – 185 psi).
Frequently Asked Questions
Q: If I were to ask which engine oil I would need, what would you recommend?
A: API service Classification classification being SF or SG is preferred with the viscosity being either SAE 10W – 40 or 20W – 50 is preferred as the engines oil.
Q: How much torque would a muffler mounting bolt need?
A: When asked a muffler mounting bolt’s electric motor would require 32 N-m (3.3 kgf-m, 24 lbf-ft).
Q: How often should the oil in a car be swapped?
A: Car maintenance requires scheduling alongside being aware of mileage to have a consistent oil changing schedule.
Q: What is the gap of the spark plug?
A: The spark plug gap specification is 08 — 09 mm 031 — 035 in.
Q: How do I proceed to check the valve clearance?
A: When the engine is cold, valve clearance may be checked by a feeler gauge placed between the adjusting screw and the sub rockers arm.
Q: What actions are available to tighten the drive chain which is too loose?
A: To reduce loosening, smooth the drive chain by losing the rear axle nut and turning both adjusters until the specified chain slack is reached.
Q: What are the specifications for the tire pressure?
A: For ED, DK types, the front tire pressure should be 100 kPa 10 kgfcm² 15 psi and the rear tire pressure should also be 100 kPa 1 0 kgf/cm² 15 psi For U type, front tire pressure is 150 kPa 1 50 kgf/cm² 22 psi and rear is 125 kPa 1 25 kgf/cm² 18 psi.
User Manual
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