Yamaha DS7, DS72, RD250, RD73, R5C Service Manual

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Specifications and Main Features

Engine: Two-stroke, cooled with air
Displacement: RD250 and RD350 models
Bore and Stroke: Measurements not available
Lubrication: Yamaha Autolube (Automatic Lubrication System)
Primary Drive Ratio:
R5C – 66/23= 2.869
DS7 – 68/21 = 3.238
RD250 – 68/21 = 3.238
RD350 – 66/23 = 2.870
Transmission: With a 5-speed system having smooth change of gears
Maximum Oil Capacity: 1500 c.c. 1.6 qts.
Recommended Motor Oil: SAE 10W/30
Ignition System: Measurement Goes Here
Starting System: Kick start
Weight: Measurement Goes Here
Dimensions: Measurement Goes Here
Special Features:
Automatic lubrication system via Yamaha Autolube.
Improved engine efficiency through 5 port cylinder design.

Frequently Asked Questions

What is Yamaha Autolube?

From Yamaha, Autolube is a two-stroke engine driven automatic lubricating device that facilitates the engines with oil as related to its speed and the throttle position without the need to have the associated oil pre-mixed with the gasoline.

How is the Yamaha Autolube used?

It uses a precision pump, engineered and attached in the engine to deliver the right amount of oil in relation to the open throttle and the current speed.

What are the petitors of the Yamaha Autolube?

Beefier performance from the engine alongside decreased oil consumption ratios are set to be the case as well: up to a third less than the conventional systems with better spark plug management alongside a notable reduction in exhaust smoke.

What oil best suits the Autolube system?

But in case optimal performance is to be ensured: either YAMALUBE or any two stroke oil that has a BIA’S TC-W stamp should be utilized.

Are there restrictions to what automotive oil can be used?

All things considered, while the Autolube system is compatible with various automotive oils, the use of two stroke oil is once again highlighted as a recommendation so that protection and lubrication concerns can be safeguarded against especially when operating under extreme conditions.

Are there maintenance routines that must be set for the oil pump?

In case of routine maintenance: checking for any air entering the oil pump, ensuring that the oil pump is not disassembled and out of stroke limits all accompany bleeding the pump to allow air exit can be considered as part of proper management for the oil pump.

What must be done in case the oil put to use is unsuitable for the Autolube system?

Ultimately ensure that the specified oil requirements are defined in the manual, as worn out mechanical components will result if motors are used that do not suit the Autolube.