please help HuaSheng problems

[evilhippy]

I recently bought a second hand motorized bike with a HuaSheng 4 stroke. Within a few days it broke a connecting rod for the piston. Ordered a new one installed it and two days later the new one broke. Any ideas why this keeps happening?

 

[BigBlue]

Sounds like your over revving the engine and destroying the rods. Here's a warning from BirdDog Distributing, owner of Bicycle-engines.com:
http://motorbicycling.com/showthread.php?t=40327&highlight=oil+connecting+rod

Good Luck,

Chris
AKA: BigBlue

 

[MotorBicycleRacing]

I recently bought a second hand motorized bike with a HuaSheng 4 stroke. Within a few days it broke a connecting rod for the piston. Ordered a new one installed it and two days later the new one broke. Any ideas why this keeps happening?

Did the new HS break its connecting rod too?

Where did you buy the motor from? new? used?

What gearbox are you running?

What is your gearing ratio and how fast are you riding it? Downhill?

Do you have a pic of your bike?

How much oil are you putting in the motor? or are you?

evilhippy? Do you have a curse on you?

Welcome to the forum.

 

[evilhippy]

the whole bike was second hand with the engine and everything attached already.no clue on the gearbox name or where the kit came from.

 

[evilhippy]

thanks bigblue. i'll try and mod the next connecting rod