I have a 49cc cateye with a non clutch transmission. i dont know what kind of tranny its considered. some background of this bike is that i received it from my brother and he did some upgrade to the engine and put some type of timing system in it also. he did this 5 years ago and ever since it has sat in a garage/outside in the rain/heat to rust and build up dirt/grease. i have replaced the gas tank, pull start, spark plug (bm6a is what i currently have in it). i also fixed up the broken fuse/ charger port wires. my problem is now that it starts but wont accelerate or dies quickly. i opened up the tranny to see if the drive sprocket was running and it runs fine. it just seems as if the engine isnt burning the gas properly/ efficiently so the bike dies or wont go faster than 3-5 mph. also when the tranny/chains are on, the chains wont move even though i can spin the tires and the chains run smooth. in the tank i put 91 octane gas when i just tried to run it to see if it would run and then i put racing gas w/ oil at 1 gal of gas to 2oz of oil (at first the spark plug i tried became covered in thick gas and the exhaust had the same thick black gas around the manifold area. im really not sure what to do at this point to get it running properly.