Jump to content
Sign in to follow this  

04 yfz top end pop

Recommended Posts

riding whole life, noob on forum. 04 yfz 450, gytr slip on, dynojet kit, pro designed 2 stage filter and intake, removing screen cone on box. no air lid. have not installed outer second stage filter. apx 6000 feet, northern Arizona. Per dyno jet instructions, 48 pilot, 160 main, 5th slot on needle. idles fine, falls on face when attempt wot. have not looked at plug yet. seems decent of bottom, maybe slight bog. backfires a bit off throttle, but I believe this is normal for slip on. no spark arrester in slip on. any help would be appreciated. thanks.....neondion

Share this post


Link to post
Share on other sites

Thanks for the response. Seems to rev off bottom good and as it climbs feels as if hit rev limiter and starts cutting out. I don't believe it has anything to do with limiter. I think I am too lean and was going to try a 165 main next. It only seems to occur at wot. I dont think it is needle concern, because at that thottle position, the needle would be fully retracted.

thanks again....neondion

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  

×