we fouled plugs using the BR8's and the BR9's. i dont ride wide open, just 2nd and 3rd gear. were going to put in the water pump seal tonight and possibly new grips. it fouls after about 20-45min. of riding. i really want to fix this problem and soon! +30, we own a compression tester measuring in PSI's. do you just put that in the exhaust and start the bike? ive heard about float level for a long time, but i dont know what your float level is. there is only one other thing i need to say/ask, whether the plug is fouled or not, if i take it out, it'll always be black with oil, fouled or not. and if you look into the cylinder, you can see oil. to explain that( possibly), when i first got this 125, i didnt know about down-shifting and clutching. i used to have a good bit of oil come out of the silencer, but know, since i mastered those two techniques( im only 13y/o), almost no oil will come out of the silencer. do you think that i did something to the bike other than it always fouling plugs? i know that i ride right and im not the one fouling the plugs, ( it's all the engine's fault!). if you guys know can think of anything else or help me with problems already stated, ( right side seal, float level, etc.) i would appreciate it very much! thanx!