Clown-n Posted November 10, 2008 Report Share Posted November 10, 2008 (edited) so my cousin bike wouldnt start checked his plugs and noticed that the ground strap was gone. what could have caused the ground strap to break off in the first place? he replaced the plug and now the left cylinder hardly smokes or gets hot, but it is getting spark and fuel. checked the compression and left cylinder has 60psi and right 110psi. I'm pretty sure his top end is screwed but before we tear it down is their anything else we should check? the previous owner said its a 370 long rod but looks all stock to me except for out of fame drag pipes, dual k&n's and stock carbs converted to alky Edited November 10, 2008 by Clown-n Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted November 10, 2008 Report Share Posted November 10, 2008 Methanol and no ground strap on the plug. I would say it was lean and melted it off. If your asking these types of questions you shouldnt be running methanol. It is a pain to mess with and should only be run for drag racing. It is very finiky, it doesnt take much to mess up a top end. josh Quote Link to comment Share on other sites More sharing options...
speed-racer Posted November 10, 2008 Report Share Posted November 10, 2008 What he said ^^^^ Looks like its time to tear it down. Quote Link to comment Share on other sites More sharing options...
Clown-n Posted November 10, 2008 Author Report Share Posted November 10, 2008 (edited) well the thing is is that he had it at my house for a while and said he was coming to pick it up. decided since it was sitting for a while why not start it up. started within 3 kicks on race gas and both cylinders fired. 3 days later at his house he tried to start it on race gas and wouldnt start. thats when he found the strap was gone. so it shouldn't have been lean if he was trying to start it with gas. Edited November 10, 2008 by Clown-n Quote Link to comment Share on other sites More sharing options...
Clown-n Posted November 10, 2008 Author Report Share Posted November 10, 2008 Why are you running gas in a methanol bike? Whats the timing set at and what domes are in it? to make sure it ran and pretty much just purging it. timing is at 0 since it has the stock timing plate and it has a stock head Quote Link to comment Share on other sites More sharing options...
J-Madd Posted November 11, 2008 Report Share Posted November 11, 2008 Burned ground strap = hole in piston or scarred piston and cylinder if the psi is 60. Leaned out. Quote Link to comment Share on other sites More sharing options...
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