Backfire on a 2003 CRF450r

[mr73]

Anyone experience any backfiring on thier CRF? When I rev my bike at idle it backfires a little sometimes, this normal for the CRF?
Mabe its the crap gas here in cali, I use 91 premium.

 

[Ol'89r]

franco.

If you rev the engine while in neutral or with the clutch pulled in, you are most likely hitting the rev limiter. This is normal.

If it does it while pulling in gear, that is not normal.

Just my $ .02