Hey guys I used to ride my bike 20 Miles one way to work on a Walmart road master bike since I have a Dui and my friend Showed me her Motorized bike so I had to have one My motor is on the bike and was running great, I Gpsed it at 34 mph and have clocked 89 miles on it so far riding with my friend but now Im having problems with my chain tensioner sliding over into my spokes and for some reason when I do have my tensioner on right it only goes 23mph on flats now.. any idea why its slower now? I have swapped spark plugs from the china lp to the ngk b6hs gapped at 0.28 since i have fouled that plug with the 16:1 ratio of break in oil. Its currently on a 32:1 ratio of oil now and i was wondering if I can go ahead and switch to 50:1 with a lucas semi synthetic 2stroke oil?? Is it okay to take the tensioner off if I remove a few links from my chain? Was also wondering about the pinion gear for the clutch since the teeth on it are shredded to bits! Is that a common occurrence with these 66cc motors?