Carb Re-jetting

[jimbo]

Do you have rejet the carb when you put on a aftermarket exhaust. How do you know if it does, or do you just do it and see if makes it better? If I take off the airbox cover and remove the stock filter, it will idle but as soon as you give it gas it dies. Does this sound right, I thought it would rev betterfaster/ with less restriction at the airbox? I am trying to get better throttle response. That is what I am looking for, I would never run it without an air filter, but someone suggested cutting holes in the air box............

 

[ogener]

If it is doing that I would say you need to rejet to a larger main jet. you can tell by looking at the spark plug after some wide open runs. black=to rich, white=to lean, tanish=just right. you usually do have to rejet after putting on an aftermarket pipe.

 

[montigo]

I put a pro-circuit t-4 pipe on my bike and it was running good w/o re jetting, but there was still a noticeable power difference, I just put in an aftermarket air filter, and took the lid off, and it is running horrible. Now I'm working on re-jetting the carb :S

 

[jimbo]

Let me know if rejetting makes a huge difference. I guess I will do the same.........

 

[jimbo]

My plug is black around the edge, but not so much in the middle, just a little white around the edges where the spark is???? Does this mean anything?

 

[ogener]

is your warior burning a little oil?

 

[jimbo]

No, its not burning oil.

 

[ogener]

idk what to say about your jetting then, its kinda weird that it has black with the white. try to put a larger main jet in or moving the needle up one clip. and see if that makes a difference.