Millhouse 50:1 with Yamalube 2R is really lean. You should run 40:1. Yamalube is a semisynthetic and doesn't lube good at that ratio as say Belray MC1 which is full synthetic. It will not effect your proformance if you up it to 40:1

 

I've run Golden Spectro a "Full synthetic" @ a ratio of 50:1 (12oz to 5 gals) for years and never had a problem. I did however recently drop the ratio to 40:1 (12oz to 4 gals) just to be a little more on the safe side with more lubrication. If it's a semi-synthetic type I would stay at or below 40:1 if it's non-synthetic stay @ 32:1. Remember a little too much oil will just foul plugs but not enough will run the motor lean and could seize it up.

Rude Dog

 

i think i run 50:1 if that is 12 onzes to 5 gal of gas.
i run pj1 pro race 2 i think thats what its called .
only had the bike 4 days

 

Roger that dunepilot858. graydon's recommeded it to me when i was running 32:1 two years ago. i thought it sounded extreme when i heard it but.. 40:1 it is.