Jump to content
Sign in to follow this  

Need some advice on a 04 Crf450

Recommended Posts

Just purchased an 04 crf450 and I am questioning the way the bike sounds and backfires? Is this normal for it to backfire and shoot flames out? When the choke is on it runs smoothly but when I take the choke off it backfires and whatnot on the deceleration of the throttle. Any advice would be great. Thanks

Share this post


Link to post
Share on other sites

Not normal. Sounds like it is "lean popping". Cause by a lean pilot circuit. You need to confirm the pilot jet isnt blocked, then open the fuel screw 1/4 turn at a time and retest until the popping stops. Depending how many turns the fuel scew winds up at you may need to go up a size pilot jet.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...