Just finished rebuild have one question

[Witterracing]

Just put in a new top end replaced oem piston with a Wiseco piston stock bore. Broke it in nice and easy like I use to with all my other 2 strokes. On take off it starts great but falls on its face half way thru then picks right back up. Never had this problem before the rebuild. Any help would be great thanks.

[Witterracing]

Rt around 9000 rpms to about 9600 rpms is when it bogs down alittle

[Tim kapopoulos]

I would cruise It around the problem rpm( 9300) pull the plug dont let it idle down you'll get a false reading. I'd bet needle position or jetting. Readjust pilot screw to highest ilde setting. That's what I do. Hope It helps.