by Blurr » Mon Nov 18, 2013 4:25 pm
Certainly could be fuel pump.
It could run fine when cold but when hot the ecu starts to lean the fuel out however the bike is already lean due to a partly blocked fuel pump. Thus the surging and lack of power when secondaries open.
Could also be blocked fuel lines, dud spark plug, maybe O2 sensor
Chariot of Fury 50cc 2stroke Race bike
Team Gumby in red
SAM & SRT Survived