100 psi and cloud of white smoke! Not good.

btxs650

XS650 Enthusiast
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Compression test revealed 100 psi on both cylinders. Motor ran but fogged the whole neighborhood with a cloud of white smoke for 5 minutes straight. Oil dripping out the 2 into 1 exhaust. Bad rings or valves or both? Either way, it looks like the top end has to come off which means I might as well hone and put new rings and seals right?
 
might as well while you're in there. also get the bores mic'd out to make sure they're in spec - best bet is to take to a machine shop and have em use a bore guage. don't forget to lap the valves.
 
I like the 750 kit Mike's sells. The engine vibrates much less at higher revs than stock, as well as the extra power.
Leo
 
The pistons in the kit look to be forged, not cast. I didn't think the weigh them before I installed them so I can't say if they are heavier or lighter. but that's what I was thinking. The change of piston weight made the vibes less.
Leo
 
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