HillTopper
Member
- Aug 22, 2001
- 13
- 0
On my 98 XR400, its totally stock except for 160/60 jetting, airbox removed, 3 holes drilled in spark arrestor, uni air filter.
When i rev the bike, it throws out a very light puff of black smoke. no, it doesnt fill the yard up or anything, but when i put my hand behind the exhaust and rev it, black moisture is on my hands(dont know the word for it). its really only noticable when i rev it.
Anyways, is this just a little rich? it doesnt sputter around either, i'm just a concerned owner.
When i rev the bike, it throws out a very light puff of black smoke. no, it doesnt fill the yard up or anything, but when i put my hand behind the exhaust and rev it, black moisture is on my hands(dont know the word for it). its really only noticable when i rev it.
Anyways, is this just a little rich? it doesnt sputter around either, i'm just a concerned owner.