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View Full Version : FRESH REBUILD ATC 90! needs more hp



effort=results
03-08-2014, 08:06 PM
so i just got the 90 broke in.50.25 bore, runs good lil burble at high throttle. but starts anytime. but she is lacking in the hp department,when compared to my 110 which is cobra piped, dratv cam,53mm bore, 22mm carbed. now i know the 90 is not gonna feel like the 110. but for giggles, i thru on a freshly rebuilt 110 carb, and she really woke up. bbbuuuuttt, she is hell to start and hard to keep a constant idle. so what jets do i need to dial her back in. i cant be the only one who has done this . i plan on getting a dratv cam for it shortly . i will probably get at the same time some jets from dratv. help please. :wondering\

188612

shortline10
03-09-2014, 08:33 AM
Those 90/110 dratv cams are no improvement over stock IMO just a good stock replacement .
If you want a real performance cam give me a pm .
Did you replace the points ?

effort=results
03-09-2014, 09:49 AM
yes new points new valves new piston and rings . readjusted valves after break in.