1985 YFM200 hard starting
#1
1985 YFM200 hard starting
My brother's 1985 YFM200 suddenly developed a hard starting problem. He has had the bike for almost a year and has put many, many trouble free miles on it except for it leaking oil around the head gasket just below the timing cover. About a month ago it suddenly began to start hard and occasionally stall while driving so I took the carburetor apart and cleaned it but it made no difference. You have to hold the throttle on a bit to get it to start and it will not start on the electric start, only on the pull start. The compression seemed to be a bit low when cranking it over compared to my Bayou (I couldn't find a compression tester to fit the plug hole so I don't have an exact number) so we decided that when we changed the head gasket to fix the leak we'd replace the rings, gaskets, etc. I got it all together last night and it's behaving exactly the same way and if I adjust the idle high enough for it to start without holding the throttle on a bit it idles way too high. I've only had it running for a few minutes to check for leaks so it's not broke in yet but it definitely has more compression now so I doubt it's a compression problem now. Any ideas what could be causing the hard starting?
#4
I have the problem fixed but I'm not sure what fixed it. I went around it and tightened up the starter bolts and cylinder to base bolts that were loose and when I tried to start it it fired right up on the electric start and has been starting great ever since, even this morning when it's only 2*C out. Hopefully today we can finish breaking it in and get all the plastics back on it today.
#5
#6
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