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as far as the larger jet size does that go on the inside cyl numbers 2 and 3 and the outside cylers 1 and 4 get the smaller size. Why would the hotter cyls need more gas?
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I think you might have it backwards. The outer cyls need more gas because the inner two burn the fuel hotter and more effeciently (maybe???). All I know is that the outer two cyls should have a little bit higher vacumm during a carb synch- I always assumed that was why.Currently bikeless
'81 GS 1100EX - "Peace, by superior fire power."
'06 FZ1000 - "What we are dealing with here, is a COMPLETE lack of respect for the law."
I ride, therefore I am.... constantly buying new tires.
"Tell me what kind of an accident you are going to have, and I will tell you which helmet to wear." - Harry Hurt -
the inner two cylinders will be slightly richer to stave off detonation. The cooler outter cylinders can run a leaner mixture without detonating.You'd have to be crazy to be sane in this world -Nero
If you love it, let it go. If it comes back....... You probably highsided.
1980 GS550E (I swear it's a 550...)
1982 GS650E (really, it's a 650)
1983 GS550ES (42mpg again)
1996 Yamaha WR250 (No, it's not a 4 stroke.)
1971 Yamaha LT2 (9 horsepower of FURY.)Comment
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So if the previous owner had the jets switched (which is what I found) could this cause a problem machanicaly ie valves burningComment
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Some models come with a step richer mains in the middle cylinders to help them run cooler.
If yours were reversed, then it's possible you could burn the valves. The mains supply fuel at 3/4 throttle and more. So the bike would have had to been ridden at high speeds for a while to burn the valves. Possible, but I would suspect the tappet clearances are too tight before blaming the main jetting.And on the seventh day,after resting from all that he had done,God went for a ride on his GS!
Upon seeing that it was good, he went out again on his ZX14! But just a little bit faster!
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