Originally Posted by skeller

The needles being wrong is what causes these engines to tune different. The "good tune" window is very small....and usually is found by using the lsn the most which is completely backwards from all other engines. Also...out of the box the needle settings are not far from race tune. People instinctivley reach to the hsn to lean out some during break in....it's almost perfect out of the box. These engines tune almost totally from the lsn.....sometimes even when you have high engine temps (280+ deg. F.) leaning the lsn will make it better if your hsn is set properly....usually around flush.

I also strongly recommend that everyone seal the slide boot to the carb....it can suck dirt in here. It will pull dirt while your WOT...then push it into the carb when off throttle. When the dirt builds up.......it falls into the engine equalling a bad day and a toasted engine.

My '08 PTM 3R is running great with no tuning problems....I will gladly help anyone with their tuning problems if I can.

Shane Keller

205-281-3089