Quote Originally Posted by Bobthebobber View Post
Hey guys. adjusted the valves today. Runs beautiful.. with just a slight ticking (there was no tick at all before as the valves were RIDICULOUSLY OVER TIGHTENED). I swapped the stock filter back on and capped off the stupid port where the crank case breather was attached just so I dont suck dirt in there while I test run with it. I was able to cruise at 50 on flat ground with a lot of throttle left. I think the valves made a difference for sure. Maybe slightly more mid range power now... but hard to tell. Still 40-45 on inclines.. but it runs on the flat much better. It does run smoother and start easier... with no more back fire through the carb.

I opened it up all the way on flat ground and was able to do 55 indicated but not a hair more. When it's wide open throttle around 50-55 the engine starts to skip and cut out and do some weird stuff... I feel like if it was smooth at this speed and throttle.. that there would be a lot more speed left in her

I had some jets left over so I tried to put a 114 in (the smallest I had) and it was way too big and made the motor run terrible. I just ordered a 108 main to try.. Not sure if the problem around 55 and wide throttle is a lean issue or a valve float. Barnone is running a 108 so ill give it a try.

Dan you say you are running a 112 main. Are you able to full throttle rev in neutral without any engine break up? I was thinking that maybe it would break up in neutral.. but as you get up to speed with that ram air that it might start running leaner and counter act the large jet.. making it run just about right. If this was the case though, full throttle at low speeds would make it run like garbage.

Im going to try the 108 and keep the filter in the stock orientation. Barnone, don't go for the 120.. it is just too much for this bike. ( I tried 114, 115, 120) The 114 would ALMOST rev smooth with the air filter totally removed.. but as soon as I put in back on it ran like crap .. even after turning the fuel adjustment on the carb almost all the way in (bringing it out = more fuel , bringing it in = less fuel).

Im hoping the 108 with some proper adjustments will take care of my problem and allow me to cruise at 55 without the engine bucking.

Barnone are you running the stock idle jet or a 42 or 45.


Btw for those that have asked I can confirm the 2012 has a 105 main and a 40 idle stock.
Your issues sounds like a clogged fuel cap vent or the carb float level is set to low.It's starving for fuel.When it breaks up,reach over and unscrew the fuel cap for a few seconds and see if it gets better.I had a similar issues on my GS5.