I think i'm running lean?
 

I took 5 disks out of my White Brothers E seris exhaust and when i took it out today it had I lot more power but when I slow down the exhaust starts poping. In the manual for it it says a lean engine will back fire on deceleration. If i am running lean could I jsut put like 3-4 disks back in would I be good. I don't want to have to rejet takes too long.

I think i'm running lean?
 

Run it again,check the plug .Then add a couple disk's back to it then check the plug again.It may be a pain to rejet but it's alot easier than rebuilding.

I think i'm running lean?
 

Ced is right! Rejet $2.50 and an hour of your time. Rebuild 400 bucks and some choice words. Jay

I think i'm running lean?
 

This may sound stuiped but, where is the spark pulg on my bike. To do A plug test all you do is get going pretty fast and the shut off the bike and check the plug.

I think i'm running lean?
 

see if the plug is white then it is lean