DBLtapS Posted July 10, 2005 Report Share Posted July 10, 2005 (edited) Evening all, I just finished my first top end rebuild. 30 over bore, superlites, Coolhead w/20 cm domes...... Shee fired up fine . After 15 minutes of slow riding with an occasional rip, I check the plugs. The left cyliner seems a bit darker that the other. I started again and noticed the left cylinder was not blowing as much smoke as the right. The pressure of the exhaust did not seem as strong on the darker plug. This leads me to believe the compression might be different. Should I be concerned about this since the rings are still wearing in? Or, did I dot do something wrong? The coolhead maybe? Those o-rings suck, couldnt get them to stay in the grooves... BTW, Money well spent. I can't believe the difference. Those drag bikes gotta be a blast! Edited July 10, 2005 by DBLtapS Quote Link to comment Share on other sites More sharing options...
superchicken Posted July 10, 2005 Report Share Posted July 10, 2005 run a series of heat cycles.2-3.let it heat up and cool down.then re-torque the jugs and head.they will loosen up as the engine heats up and cools.expands and contracts.that may be your problem Quote Link to comment Share on other sites More sharing options...
fixitrod Posted July 14, 2005 Report Share Posted July 14, 2005 Could just be a plug fouling out from the oil added during the rebuild. Like said above run a few heat cycles and try new plugs before getting to hasty. Quote Link to comment Share on other sites More sharing options...
Banshee~ Posted July 14, 2005 Report Share Posted July 14, 2005 Next time you have the head off, put some greese on the orings and the will stay in the groove better. Do you have stock pipes on? Quote Link to comment Share on other sites More sharing options...
DBLtapS Posted July 16, 2005 Author Report Share Posted July 16, 2005 t-6s took the head off and the left cylinder is f'ed. Looks like the ring caught one of the ports and tored it all up. Just ordered a new topend kit. Gonna bore it .60 over. And take the cylinders to a diff shop. For those of you in Michigan, stay away from Funk motorsports in Flatrock.... Quote Link to comment Share on other sites More sharing options...
BansheeBrian Posted July 16, 2005 Report Share Posted July 16, 2005 Sounds like a lazy/half-ass chamfer job to me. Quote Link to comment Share on other sites More sharing options...
fixitrod Posted July 18, 2005 Report Share Posted July 18, 2005 I'd be walkin in with my cylinders and out with cash in had of that was me. Funk that Quote Link to comment Share on other sites More sharing options...
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