head

Huge loss of power. So i opened the engine And here this. There was metal looked like the needle from the bearing, but the bearing Is completaly fine. Can anyone Tell what Broke?

Hoping for some advice on head/carb combination Current setup: 26" wheel 36T sprocket 49cc Stock slant head with 2 gaskets from soda can SKF main bearings Stihl top needle bearing RSE reed valve Banana expansion w/ stock exhaust's whole header (~20cm) Custom CDI (kx/jag/ivanh/rohmell...)...

Does it matter which way the head faces? I'd like the plug to face the other way.

im building this new bike its a shimano 21 speed. its got really large tubes in the frame and there is only so much space in the v portion of the bike. Ive got a 48cc skyhawk and the spark plug normally points to the rear but on this bike the spark plug sticking up and there is no room to fit...

So I just ordered 50cc flat head 2 stroke motor kit from BGF a few days ago to put on an old bike. I have been preparing the bike this weekend, I have all of the tools ready, I moved the front brake lever to the right side temporarily removed the rear brake's cable and handle until I can get a...

If the head bolts/nuts are supposed to be torqued to 12-15 ft/lbs for the 80cc engines, does that mean the spark plug should also be torqued to 12-15 ft/lbs too?

Whats the difference between a grubee sky gt5 and the gt5-A?

Just a FYI, if you have an angle plug head on a smaller framed bike, you can easily create the clearance you need by flipping the cylinder head... YouTube - ‪engine mounting trick, reverse the head‬‏