Dangerous jetting

[moore020]

Is it more dangerous to be jetted to high or to low? Rejetted last night and bike runs like a champ, but i wont be able to plug chop for a bit.

[Scro]

Being jetted low is more dangerous because the motor will run hotter.

[jcs003]

i always jet a bit rich. my motors have lasted for years. with many modifications.

unless your racing i see no benefit in trying to fine tune to where it may have a lean condition. like they say, "it always runs its best right before it fails"

[moore020]

Well I removed a gauze type filter and went from flooding it in high RPMs with a 152(It was in the 60's) to a foam filter and it running really well with a 148(Last night when it was in the high 30s.

[f4iracer]

I enjoy the quote however it's certainly not true in all cases.

Most of the time symptoms appear and the motor begins to get funky before it actually craps out.

[mineralgrey01gt]

Originally posted by jcs003
i always jet a bit rich. my motors have lasted for years. with many modifications.

unless your racing i see no benefit in trying to fine tune to where it may have a lean condition. like they say, "it always runs its best right before it fails"

that quote is so true. You can ask my bro. I was racing him on my 250r with a bone stock motor, stock porting with a pipe and carb vs his 250r with a 310 with pipe, carb, reeds, etc, and my 250r was ahead of him by a bike and the bike quit running. I heard something rattling in my pipe and took it off and saw my piston skirt laying in it and the spark plug had metal jammed in it. I actually ran that bike the rest of the day and it ran like a champ. I was shocked lol

[JOHNDOE83]

Originally posted by jcs003
i always jet a bit rich. my motors have lasted for years. with many modifications.

unless your racing i see no benefit in trying to fine tune to where it may have a lean condition. like they say, "it always runs its best right before it fails"




You are 100% right, me too. I have a 220 main jet...