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| Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance. |
Chain problem
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle Trouble Shooting forum. I am having problem getting the chain to work right. I tried the tensioner but limited luck.
My motor twists ...  | | 
09-21-2009, 08:29 AM
| | Motorized Bicycle Newbie | | Join Date: Sep 2009 Location: Indiana
Posts: 17
| |  Chain problem
I am having problem getting the chain to work right. I tried the tensioner but limited luck.
My motor twists slightly in the frame could this be the problem?
I am going today for a new motor mount by modding a electric farm motor mount.
If this does not fix the problem I am thinking I will try a belt drive conversion.
Has this been done with a grubee motor b4?
Stats grubee 66 cc engine
damondback ful size cruiser bike with front suspension. |
09-21-2009, 09:29 AM
| | Motorized Bicycle Elite Member | | Join Date: Feb 2009 Location: australia
Posts: 265
| | Re: Chain problem
Quote:
Originally Posted by Bmetz  I am having problem getting the chain to work right. I tried the tensioner but limited luck.
My motor twists slightly in the frame could this be the problem?
I am going today for a new motor mount by modding a electric farm motor mount.
If this does not fix the problem I am thinking I will try a belt drive conversion.
Has this been done with a grubee motor b4?
Stats grubee 66 cc engine
damondback ful size cruiser bike with front suspension. |
You need to tighten the mount bolts, the motor is not ment to move. |
09-21-2009, 10:49 AM
|  | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,081
| | Re: Chain problem
You should be able to get the engine on straight and then tighten it sufficiently.
What is causing it to be crooked?
__________________
If it ain't broke, and you mess with it long enough, it will be. |
09-22-2009, 03:22 PM
|  | Custom Builder / Dealer | | Join Date: Mar 2008 Location: Los Angeles, CA.
Posts: 1,434
| | Re: Chain problem
There are three things that you must do...
#1 Make sure your rear sprocket spins perfectly straight!!!
#2 Make sure your chain tensioner is feeding the chain straight onto the rear sprocket & then drill a hole & SCREW IT INTO THE FRAME!!! You can also bend the tensioner to make it line up with the chain a little better.
#3 Make sure your engine isn't moving around... NO RUBBER MOUNTS!
Last edited by Venice Motor Bikes : 09-22-2009 at 08:35 PM.
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09-22-2009, 05:07 PM
| | Motorized Bicycle Member | | Join Date: Feb 2009 Location: Charlotte, NC
Posts: 47
| | Re: Chain problem
Venice Boy,
What is easiest way to bend the chain tensioner? I put the chain on today after removing some links and when everything looks good and lined up, the roller seems to be a little off, like it may run in a bind.
Thanks,
D. J. Pedal Pusher |
09-22-2009, 05:21 PM
| | Custom Builder / Dealer | | Join Date: Mar 2008 Location: Los Angeles, CA.
Posts: 1,434
| | Re: Chain problem
Quote:
Originally Posted by pedal pusher Venice Boy,
What is easiest way to bend the chain tensioner? I put the chain on today after removing some links and when everything looks good and lined up, the roller seems to be a little off, like it may run in a bind.
Thanks,
D. J. Pedal Pusher | Put it in a vice & bend it with a large adjustable wrench... Or just use two wrenches.
You can "fine tune" it with a hammer. |
10-04-2009, 10:40 AM
| | Motorized Bicycle Newbie | | Join Date: Sep 2009 Location: Indiana
Posts: 17
| | Re: Chain problem
Ok I got the chain issue worked out. I got the number 43 chain from tractor supply, the rubber spring mounted chain tensioner from tractor supply and re mounted the engine with a bit of plumbing rubber seal in the mounts to dampen the vibration.
although now I have bent the rim cause the chain jumped off while getting the whole mess aligned right and got caught up.
next purchase is HD axle and good rim.
Asked local bike shop about respoking wheel and they quoted me $70! Guess I will find a youtube tutorial to do it myself. Any suggestions on where to buy the 12ga spokes online? |
10-04-2009, 10:44 AM
| | Motorized Bicycle Newbie | | Join Date: Sep 2009 Location: Indiana
Posts: 17
| | Re: Chain problem
with even the wobbling rim i still have hit 30mph or so.
note when you get a chinese kit, remove all the bolts nuts and studs and replace with good American hardware. also get some good lock washers and thread lock |
10-04-2009, 11:44 AM
|  | Motorized Bicycle Elite Member | | Join Date: Jul 2009 Location: Mi
Posts: 644
| | Re: Chain problem
Got coaster brake? I bought the whole (12G spoke HD rim) wheel for $43 at my LBS. |
10-04-2009, 12:50 PM
| | Motorized Bicycle Newbie | | Join Date: Sep 2009 Location: Indiana
Posts: 17
| | Re: Chain problem
caliper brakes front and back, would like to find a nice disc brake. saw a guy in cali who had fabbed a disc brake setup on the front but i suspect that i will have to buy a high end fork with a disc brake installed already to avoid the endless experimentation and wasting of $ | | Thread Tools | | | | Display Modes |  Linear Mode | 
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