OK, I originally placed this in the HRC forum..... sorry!
I guess this question has been asked a thousand times but I couldn't find the answer.....
I bought a MC21 SP last Autumn and spent winter sorting it cosmetically, now I'm trying to sort the engine. The bike pulls well up to about 8000rpm but then coughs and splutters. I did the orange/blue wire mod but the gear position work hasn't been done.
Sitting here at the PC I don't know whether to go for carbs, ignition, power valves or whatever so any pointers would be welcome.
On the last two stroke I owned (RD400) it was a case of clean the plugs and off you go but this is a little more complex!
Thanks in advance.
Chris.
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