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| Mounting Techniques Every frame is different. Share and ask questions about mounting your motorized bicycle engine kit to your bicycle frame or bicycle rack |
Chain Rubs Frame
Discussion at Motorized Bicycle Engine Kit Forum in the Mounting Techniques forum. Hey, So my chain rubs the frame of the bike. I'm not sure what I can do to fix ...  | | 
07-20-2009, 01:38 PM
|  | Motorized Bicycle Member | | Join Date: Jun 2009 Location: ohio
Posts: 25
| |  Chain Rubs Frame
Hey, So my chain rubs the frame of the bike. I'm not sure what I can do to fix it. I've ridden it a little bit. The frame is slowly being ground away and the chain is too. Any suggestions?
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--If it any broke don't fix it.
--If it's already broke you can't make it worse.
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07-20-2009, 02:29 PM
| | Motorized Bicycle Elite Member | | Join Date: Mar 2009 Location: ridgway colorado
Posts: 262
| | Re: Chain Rubs Frame
can you send a pic so we can take a look? |
07-20-2009, 04:07 PM
|  | Motorized Bicycle Elite Member | | Join Date: Mar 2009 Location: upstate NY
Posts: 1,451
| | Re: Chain Rubs Frame
you didnt say what part of your frame. |
07-20-2009, 05:03 PM
|  | Motorized Bicycle Elite Member | | Join Date: May 2008 Location: Decatur,IL
Posts: 491
| | Re: Chain Rubs Frame
probably upper chain stay
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" We cannot live through a single day without making an impact on the world around us. And we all have free choice - what sort of difference do we want to make?" ~Jane Goodall~  |
07-20-2009, 05:04 PM
| | Motorized Bicycle Elite Member | | Join Date: May 2008 Location: Decatur,IL
Posts: 491
| | Re: Chain Rubs Frame
try and move rear sprocket closer to hub!
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" We cannot live through a single day without making an impact on the world around us. And we all have free choice - what sort of difference do we want to make?" ~Jane Goodall~ |
07-20-2009, 05:16 PM
| | Motorized Bicycle Member | | Join Date: Jun 2009 Location: ohio
Posts: 25
| | Re: Chain Rubs Frame
Sorry I'll send a pic as soon as I can.
The upper section of the chain is rubbing against the inside of the rear fork about 1/2 way up to where all three tubes meet.
I have a "80cc" BGF (Left side drive)
Also the sprocket is as far to the inside as I can get it.
__________________
--If it any broke don't fix it.
--If it's already broke you can't make it worse.
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07-21-2009, 07:59 AM
|  | Moderator | | Join Date: Mar 2008 Location: Cuk Ṣon, AZ
Posts: 4,722
| | Re: Chain Rubs Frame
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07-21-2009, 08:13 AM
|  | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,081
| | Re: Chain Rubs Frame
Whatever you do to fix it, keep the run of the chain straight. Do not resort to moving the sprocket to one side and having the chain run crooked so it clears the frame!
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If it ain't broke, and you mess with it long enough, it will be. |
07-21-2009, 11:42 AM
| | Motorized Bicycle Member | | Join Date: Jun 2009 Location: ohio
Posts: 25
| | Re: Chain Rubs Frame
After looking at the bike and the problem a little more, I think i am going to try some washers to spread out the frame a little bit.
__________________
--If it any broke don't fix it.
--If it's already broke you can't make it worse.
|
07-22-2009, 10:12 AM
|  | Custom Builder / Dealer | | Join Date: Mar 2008 Location: Los Angeles, CA.
Posts: 1,434
| | Re: Chain Rubs Frame
A possible solution came to me in the middle of the night...
Is it possible to lower your engine & remount it closer to the pedals???
You can do this by cutting a little off the rear engine mount on the back-flat side!!
Just make sure the engine wont touch the pedaling sprocket. | | Thread Tools | | | | Display Modes |  Linear Mode | 
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