660 big bore kit

[JAYE642]

i recently installed a big bore kit on a 660 sthil and i am having problems with it not running right i have checked for air leakes tried to clean carb and put a new kit in it but it still acts like it runs like it is running out of gas. and it will not idle any help would be appreciated.


thanks jaye

 

[oscar4883]

You did a pressure/vac test to check for air leaks? Does the saw engine race like it does before you run out of gas or does it seem like it just isn'tgetting fuel? If so you may want to go through your fuel system again. Also, was this a planned modification or did the stock top get roached?