Originally Posted by
E-Dog
Hi guy's, I just put away a Go 5PT in favor of a new Sirio for my buggy.
Hit & miss for me on tuning finally got the best of me and purchased a new mill.
Anyway after pulling it apart to clean it for storing I found the piston crown really dark with goo as well as the turbo button
and seamed to be more on the exhaust side than everywhere else, also when it would flameout after about 8-9min on track it would blow smoke from the pipe looking like a steam engine
for a few seconds
Running:
Maxy's 20% / OD 97 Plug / Sirio carb / Dynamite 086 pipe.
Also after I pulled it apart for cleaning I found the front bearing was leaking bad, I found a lot of goo on the Flywheel, clutch & chassis. Maybe going on for a while I think it may also contribute to tuning problem, what u guy's think ?
Hi E-Dog, sounds to me like you had a case of too rich on the bottom and too lean on the top, a common senario when not tuning the long LSN carb properly. Hence the blackened piston top and the excess oil coming from the front bearing (too rich down low) and the flame outs (too lean on top perhaps).
Before you give up on the 5 Port (which is a really great motor), get yourself an intermediate or short LSN needle and try it again. They run great on the long needle, but if you can't get your head around the difference in tuning then make the swap to a shorter needle which will tune like any other motor.