Listen guys, i need to know if you can tell if my bike is lean or not.....i've got a youtube video of it running now...Skip to 2:00 in the video to hear it run...
Jetting, can sound tell you ??
- Thread starter Blaster200boy
- Start date
Sound can give you a clue, but only if you are VERY familiar with what YOUR bike sounds like when it's dead on perfect. Why don't you just do a plug read? Having people guess by listening is really quite useless and a good way to cook a piston if you do happen to be lean.
well it just does RING---------ding----ding----ding--ding--ding-ding. isn't it supposed to go RING-ding ding ding ding?
I agree with doc....just check the plug and do a few plug chops to get it right. Trying to guess by sound could very easily lead to a melted piston. A few sparkplugs for plug chops is still a lot cheaper than replacing your topend, take the time and do it right. It may get pretty annoying having to pull the plug and chop it and rejet a few times but its definitely better than trying to cut corners and ruining a topend.
good idea...i just ordered a #340 jet and a TORS block off Kit...and getting some plugs tomorrow! =)
I've heard of people saying they could hear the engine and tell you either if its rich or lean...My guess its rich only because my elevation is 900ft, my garage was 50*F closed airbox with a 330 main....it could've been my stupid a/f mixture screw...i forgot to add that i didn't turn it back out after i cleaned it....lol. maybe thats why it went slow...it was too rich?
my engine builder can tell how an engine is jetted by playing with the throttle a few times. I don't know how he does it, I sure as hell can't hear a difference
your a bit lean..... bump up on the pilot not the main... i think your main is just fine....b
i saw your vid
i saw your vid
I have my a/f screw turned all the way in, that might be the issue....its supposed to be at 1.5 turns...
I have my a/f screw turned all the way in, that might be the issue....its supposed to be at 1.5 turns...
approximatly 1.5 turns out is a good starting piont,(not writen in stone) if you need to turn it out further its a good indicator that you could go down a size on your idle jet, if it runs best at less that 3/4 turn out you could go up a size on your idle jet
once you get it close you can pretty much leave the idle jet the same and make adjustments with the a/f screw
I believe once you have done enough messing around with jetting you can tell alot by the sound but it also takes sight and feeling.
cutting the plugs threads off (plug chop) and inspecting the base of the insulator as posted above is the best way to tell pre and post jetting.
ther is also a noise we refer to as breaking up ahrd to explain but its when the main is to fat and it keeps the engine from reving past a certain range
yeah turn that airscrew 1.5 turns out and if that doesn't do it then go to the next size pilot....
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