help fix broken

Engine wouldn’t start after 2 miles on a very hot day while riding. I suspected the clutch, no change. Once I opened it up, the piston looked scoured and the cylinder wall as well. I’ve never worked on the top end before and need to know what to get. What piston is this? The diameter of the...

Hi guys my motorized bike i bought a bunch of upgrades like the bbr thrust exhaust, performance carb with better air filter, new gas tank, new cylinder and cylinder head, and it keeps topping out at around 20mph im new to motorized bikes and just got this like a month ago and only been riding it...

Hi guys my motorized bike i bought a bunch of upgrades like the bbr thrust exhaust, performance carb with better air filter, new gas tank, new cylinder and cylinder head, and it keeps topping iut at around 20mph im new to motorized bikes and just got this like a month ago and only been riding it...

I have a basic Chinese motor. recently, I upgraded from my leaking NT carb to an HP carb. I put the new carb on and go for a ride, it runs great. the next time I ride I heard A lot of clicking, coming from around the piston cap. I bought a new piston cap gasket and double stacked them, I was...

I have the Aurelio Tech 80cc 2-stroke motor kit for my mountain bike. Everything has been just fine except for the chain. Originally I had the tensioner way too tight and of course the chain snapped. Luckily it just broke the master link. So I ordered a Chain Link Remover and fixed it...

hi, my China girl I've had for about a year now doesn't idle whatsoever. when i start it it 'runs away' and wont stop for anything except for unplugging the wires from the motor to the cdi. I've tried everything in my knowledge to fix it with no prevail. please help. :-||

So I'm not to familiar with combustion engines of any kind, and well I purchased an 80cc gas powered engine from ebay and a bike from walmart. I paid my friend to assemble the bike, I have owned it for about a month and about a week ago i was headed to work which is about 4 miles from my house...

Ive searched all the other threads (several times ive been working on this poblem for 4 weekends, i know how sad that is). I have a schwinn clairmont cruiser with a grubee 48cc 2 stroke on it. Everytime I fire It up and start riding it, it will only go about a hundred yards before the wheel...