250R Ignition ?

[X2guy]

I’ve just finished a complete resto on my 86 250R. 2 kicks and it fired right up. I let it warm up and started to rev the engine a little. It seemed to act as if the spark plug was fouled. I changed the plug with another and the same thing continued. I pulled out the coil and measured the primary coil resistance and got 0.8 ohms. The manual says it should be between 0.1 and 0.3 ohms. Could his be my problem?

[ATCWRENCH]

yea if it is not in spec then it will cause a problem.

[atcsteve]

Also maybe a crack in the timing plate!

[X2guy]

So my new coil came in the other day and I installed it last night. I fired it up and still the same thing. It would start and idle just fine but on top it would run like the plug was shot. As I was rolling it back into the garage I thought of something…The air box lid…I pulled it off and she lit right up.:w00t: I cant believe that all this time it was only that. I should have known better…I’ve got a 40mm carb and a Duncan pipe. The thing has to breath.:rolleyes: