Originally Posted by
My ST-RR EVO
It looks like you're running a buku cap on there. Is that true? Those caps gave me an issue because the front bearing would suck in the dirt embedded grease over time and really cause drag in the bearing. The engine would not rev right as a result. That extra dirty you have on your engine looks ripe for the clogging. .. If that is a buku cap on there try removing it, cleaning the front bearing thoroughly and then running w/o the cap. Those caps are great add long as you do the maintenance.
Yep, we through everything we could at it at PNB when we couldn't get it to run right. I sealed the backplate and the carb as well as put the buku cap on it. People still say it sounds like it has a leak because the idle will occasionally climb while sitting on the box for no apparent reason.