cylinder head

any tips for purchasing a cylinder head? how do I know which one will give a better performance boost and whatnot, I've just been going by what people say in reviews and stuff. the pic is my bike

Hello, i am new to the Forum. I am posting because im afraid my motor is going to blow. my build is as follows, -66/80cc silver slant kit "From Gasbike.net" -NGK #BPR6HIX Spark Plug -Super Charge HI-Preformance CDI "From Gasbike.net" -Stock Carburetor -Stock Air Intake Tube "Ported by me"...

First time bike build. I put everything together correctly but I cant seem to get fuel into my chamber from my carburetor / intake. I took off and am looking through the intake tube between the carb and the cylinder head. I can see my piston moving up and down as spin the wheel, but it wont go...

Hello All, I'm new to the forum and have discovered a ton of info here. Thank you all for offering your discoveries and wisdom. We have opened the first E-Bike shop dedicated to motorized bicycles in NJ. We have a special focus on vintage bike frames and vintage motors. We have an...

Hello everyone! It's great to be part of this forum, I have read many threads to get to where I am with my project. First, I am a newbie and this is my first built. I have a RAW Silver Slant 66/80CC. 1. First issue I had was mountin the engine to my Schwinn Clairmont 26" so bought a...