werner Posted December 22, 2006 Report Share Posted December 22, 2006 installed my new noss head (19cc) and rode for 2 days in sand. ran perfect, never had any noise whatsoever come from my engine before install. end of second day i lined up and started to drag a buddy but bike wouldnt get into powerband and started making unusual noise i belive from cylinder area. bike has VERY few hours, pistons, cylinders looked and felt flawless when i installed head. being i had to limp back to camp i found that bike ran fine, minus the noise, up until it would reach powerband. like i said, bike ran perfect and this happened all of the sudden. dont belive its "blown up" and from what i felt has good compression. possible piston slap? possible broken or sucked in reed (VF3's)? SUGGESTIONS PLEASE? would like to have somewhat of an idea what to look for while im tearing down. my mods are k&n pods, t5, vf3, noss 19cc head :ninja: Quote Link to comment Share on other sites More sharing options...
dlnoss Posted December 22, 2006 Report Share Posted December 22, 2006 What octane gas were you running? Race gas I hope. Pull the plugs and check the compression and the appearance of the plugs. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted December 22, 2006 Report Share Posted December 22, 2006 What elevation are you running at? What do your spark plugs look like. I borrowed this pic from Red's post. Does the plug on the left hand side resemble what yours look like? Quote Link to comment Share on other sites More sharing options...
werner Posted December 22, 2006 Author Report Share Posted December 22, 2006 (edited) i run 3 gal of 110 octane and 2 gal of supreme. run at sealevel on the coast. plugs were on the verge of lean but more like the right one far from the left one...? motors coming out in the morning so ill find out then :ninja: Edited December 22, 2006 by werner Quote Link to comment Share on other sites More sharing options...
BigRed350x Posted December 22, 2006 Report Share Posted December 22, 2006 You don't have to pull your whole engine, just the top end and you can do that real easy IN the frame. Just pull your gas tank and pipes and plastic. Quote Link to comment Share on other sites More sharing options...
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