jetting

[BlaineKaiser450]

Waht jetting should i run with a Weapon Mx full system and the airbox lid off? right now i have a 165 main and its popping slightly during deceleration

[300ex_#387]

If its running fine when your on the gas, and popping when you let off try leaving your main the same and bumping the pilot up to like a 48.

[BlaineKaiser450]

ill try that

[d3ktrix]

Your sig says your running an 04, does it have the stock carb?

A 165 main jet sounds really lean for an 04 carb.
Thats 06+ range jetting.

[GIXXER1KR]

Also b4 rejetting try adjusting your air mixture screw.:) I had the same issue and went crazy changing the pilot jet and ending up back at the 42 and just fine tuning the air mixture.

[BlaineKaiser450]

Originally posted by d3ktrix
Your sig says your running an 04, does it have the stock carb?

A 165 main jet sounds really lean for an 04 carb.
Thats 06+ range jetting. when i pulled it out, it had a 118 :eek2:. yes it has the stock carb.

Does anyone know where i could get some jets to mess around with? thanks

[BlaineKaiser450]

also, would a Sparks jet kit be any good? i would think it would work because my exhaust is a lot like a Sparks

[d3ktrix]

Originally posted by BlaineKaiser450
when i pulled it out, it had a 118 :eek2:. yes it has the stock carb.

Does anyone know where i could get some jets to mess around with? thanks

Well that makes sense because the stock jet is a 118 :P
For an 04-05 though, 165MJ is too lean. Unless maybe u live in some crazy high elevation you should be closer to 180-185MJ with the air box lid off.

People with 06-08 FCR carbs should be running around 165, not in a 04 bike.



Originally posted by
BlaineKaiser450
also, would a Sparks jet kit be any good? i would think it would work because my exhaust is a lot like a Sparks

The brand of the jet kit has nothing to do with the brand of the exhaust.
The sparks jet kit comes with keihin jets anyway I think.

[BlaineKaiser450]

Originally posted by d3ktrix
Well that makes sense because the stock jet is a 118 :P
For an 04-05 though, 165MJ is too lean. Unless maybe u live in some crazy high elevation you should be closer to 180-185MJ with the air box lid off.

People with 06-08 FCR carbs should be running around 165, not in a 04 bike.




The brand of the jet kit has nothing to do with the brand of the exhaust.
The sparks jet kit comes with keihin jets anyway I think. ok everyone was saying that a 118 was too small, i guess they were wrong. So i should try a 185 main? and would the Sparks kit work or not?

[300ex_#387]

Are you running a stock filter? I would try a 175 main jet, and bump the pilot up to a 48. You shouldn't have to buy the sparks kit. Do you have a local dealer? They should carry jets in stock.

[bloodmoney23]

yes the sparks kit is nice but you still may need to tweak it a bit because i am pretty sure they only come with the jets and needle that go hand in hand with thier pipe and filter.

[BlaineKaiser450]

Originally posted by 300ex_#387
Are you running a stock filter? no ive got an uni