Motorized Bicycle Engine Kit Forum  


Go Back   Motorized Bicycle Engine Kit Forum > Motorized Bicycle > Motorized Bicycle General Discussion

Motorized Bicycle General Discussion All topics regarding bicycles with engines.

Thread Tools Display Modes
Old 11-27-2009, 06:06 PM
Tcams's Avatar
Tcams Tcams is offline
Motorized Bicycle Elite Member
Join Date: Oct 2009
Location: Tucson, ZonieLand
Posts: 412
Default Re: Problem!

just ran it without the air filter. Still the same jerking. It only jerks back and forth when I let off the gas..and when I its at full throttle.
Reply With Quote
Old 11-29-2009, 01:09 AM
AnthonyX99 AnthonyX99 is offline
Motorized Bicycle Elite Member
Join Date: Oct 2009
Location: Winnipeg
Posts: 127
Default Re: Problem!

are u sure the chain didn't get caught on the frame or anywhere else if it did your engines done that happen to me that crap 415 chain that cam with the kit didn't last 100 kilometers so what happen is it put my engine out of timing and the piston was late also the key was it worked fine till it was really hard to start and I mean hard I had to pedal for 2 blocks to fire it up and sometimes it' didn't start at all I removed the magnet and coil there was a lot of play when the piston was at the top it missed the spark I haven't the chance to open the whole engine yet but if it's hard to start you chain might have got caught and it also backfired as well. btw is if bogging it might be out of timing.

Last edited by AnthonyX99; 11-29-2009 at 02:27 AM.
Reply With Quote
Old 11-29-2009, 03:48 PM
Norman's Avatar
Norman Norman is offline
LORD VADER Moderator
Join Date: Jan 2008
Location: pampa texas
Posts: 2,606
Default Re: Problem!

I don't know if this will help or not.If you think it might be out of time a little
you can pull the mag coil off then the mag rotor see if your wood ruff key is sheared.
Mark the mag rotor before you take it off so you will be sure to install it the same way it came off.
use a dab of super glue to help hold the wood ruff key in place as the magnetic force of the mag rotor will try to pull the key out of its slot when your reinstalling the mag rotor.
If the wood ruff key is sheared you can get a new key from one of the vendors here on the side bars.
also check the seal on the crank while your there make sure it is seated flush or a little more than flush with the crank cases surface. If the seal is leaking you will see a black oily poo leaking out of it.
Some keys are factory installed wrong and will rub the seal ruining it the mag rotor can also rub the seal if the seal is not installed properly. The same thing can happen to the crank seal on the drive gear side.

Last edited by Norman; 11-29-2009 at 03:53 PM.
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 02:16 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.