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Old 02-10-2013, 07:56 PM
bwader bwader is offline
Motorized Bicycle Member
Join Date: Feb 2013
Location: hampton roads VA
Posts: 21
Default Roadmaster Mtn bike 49cc bike

Hi, I'll say I started with a 49cc bike kit from BGF/LEB luckyearlybird about 2 years ago. Got it all put together and only got it to run for 30 sec. I ended up turning a head bolt a little too much and it stripped. I tried my darndest retapping a new hole and using a HELICOIL like brand thread saver in the spot and didn't work.

After watching a lot of youtube videos and some forums I have bought a new chain (I cut it too short and destroyed the remainder of it with a hammer and flathead.
New carb. and now a new "speed carb". Haven't tried the speed carb. yet.
another CDI coil checked connections to magneto seemed ok. Got spark turning the engine.
Fresh premium gas and mixed 16-1.
Tried different spark plugs still spark with each so led me to the conclusion after making sure the intake and carb. connections are sealed.

So now I got a New 49cc engine from LEB. Checked it , it was a little rusty inside the clutch gear though it had red grease in between the gears, made the clutch work how I want it.

So now after all this rambling about stuff I've done over the past years. The part I have trouble now is IF this new engine works like it should. I just need to get it mounted to the frame good. The quick and easy answer I know is just get a beach cruiser bike or larger frame.

But I'm making this work on my Huffy Roadmaster. I got a slanted head for the spark plug which gives me more room to work with than before.

Anybody know the size of 49cc mounting studs, they are too short to go around the frame and the U bolt won't work. The studs make it about half way around the frame. So if I had a female stud extender I could have a working front mount. Right now I can make the rear mounting bolts secure.

Sorry no pictures I don't have a camera or it would be sooo much easier.

Also I use an off-set intake for the carb to be able to fit the frame.

Last edited by bwader; 02-21-2013 at 11:53 AM.
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