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i need to know this one ,what is the sr 250 fly wheel manufactures name? i bought a new sr 250 but it has fly wheel model mitsubishi and base plate has one pulsar. have u a sr 250 give me details for fly wheel model,

i need to know this one,how to adjust pulsar coil with fly wheel trigger marks , how to set it?i havent timing llight and cant find it.

thanks for u r reply.i think year model is 1986.this model is yd 250.4 stroke ,2 valves ,2 exhaust pipes. engine is very similar to sr 250,(looks like honda 185.honda road master).this model hasn,t more details, if u can check this on you tube it has only one video .engine number and parts have 31G number.

.thanks for u i bought this yamaha yd 250 cc 4 stroke bike.but previous owner changed its cdi unit.bike is very similar to sr 250 bike.now engine overheat and allways back fires, and engine not going fast.pls if u can tell what is the correct cdi unit now it has yamaha mate 50 cdi unit. .thanks for u

i have a yamaha yd 250 cc 4 stroke bike, this is very rare model,i have some problems,i need yamaha motor corporation e mail address ,can anyone know it,pls reply me.

i need know how to set cdi ignition timing.i never use a timing light.pls tell how to set timing with timing light and what is the best timing light.

thanks for u , this is the fly wheel number ,flywheel model mitsubishi, F3T370, if u can find this model in u tube,it has videos, this is the engine number 31G-002716, in every parts can see the 31G number, if u can tell what is the suitable cdi unit for my bike.

i actually mean yd 250 ,4 srorke ,one silinder ,2 valve ,ohc ,double silancer bike, but in internet hasnt show this bike ,u tube has one video only, do u mean it 250 ar raptor 250 cdi unit is suitable for this type, but the problem is we dont have timing light tool.i couldnt find this one ,i went more workshops,how can adjus the firing angle adjusting points without timing light.if u know send me a link sr 250 full manual .thanks for u.

i bought a yamaha yd 250cc bike,i m new for the this bike,but previous owner changed the cdi unit,black box. bike start is serious problem,it allways backfires and engine going to highly heat.cant slow engine allways trying to stop and cant going fast.most people says yd 250 engine like sr 250 engine.is it a true? what is the suitable cdi unit for yd 250?previous owner changed cdi unit now it has yamaha mate 50 cdi unit.pls give me your answers.