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Motor sprocket change


Discussion at Motorized Bicycle Engine Kit Forum in the High Performance Bicycle Engine Tips forum. I have a stock sprocket set up on my bike, 10 on front 44 on rear. My bike will top ...
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Old 09-30-2008, 07:25 PM
Motorized Bicycle Apprentice
 
Join Date: Sep 2008
Location: Lebanon, Mo.
Posts: 15
Default Motor sprocket change

I have a stock sprocket set up on my bike, 10 on front 44 on rear. My bike will top out at 30mph. It will run all day at 25mph. What I would like to know is what sprocket combo would I need to cruise at 30mph. I would like to change the front to a 11 tooth, but I'm not sure how that would work. Any suggestions?




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Old 10-01-2008, 01:56 AM
Master Motorized Bicycle Builder
 
Join Date: Aug 2008
Posts: 184
Default Re: Motor sprocket change

10-tooth in front, 36-tooth in the rear
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Old 10-01-2008, 02:58 AM
Clotho's Avatar
Senior Motorized Bicycle Builder
 
Join Date: May 2008
Posts: 79
Default Re: Motor sprocket change

Don't touch the sprocket on the motor. Change the sprocket on the wheel. There isn't clearance for a larger sprocket on the motor and you would probably have great difficulty finding one anyways. The sprocket on the wheel however is cake. Just look to the left here. Andy makes some really nice ones.
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Old 10-01-2008, 09:48 AM
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Master Motorized Bicycle Builder
 
Join Date: Jul 2008
Location: WEST FRANKFORT, IL
Posts: 241
Default Re: Motor sprocket change

kings sales and service makes a quality light alumanum sprocket. ive got a 20" rear wheel and a 27t that cruises at 35. and ive herd around here that on a 26" wheel a 36 is the way to go with out giving up to much low end
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Old 10-01-2008, 09:46 PM
Master Motorized Bicycle Builder
 
Join Date: Sep 2008
Location: black mountain NC
Posts: 109
Default Re: Motor sprocket change

Quote:
Originally Posted by OSCAR383 View Post
kings sales and service makes a quality light alumanum sprocket. ive got a 20" rear wheel and a 27t that cruises at 35. and ive herd around here that on a 26" wheel a 36 is the way to go with out giving up to much low end
thats what I run
a 36 tooth on a 26 inch wheel
its a good all around gear
take care
JAK
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Old 10-01-2008, 09:52 PM
Smoothe's Avatar
Senior Motorized Bicycle Builder
 
Join Date: Sep 2008
Posts: 69
Default Re: Motor sprocket change

What kind of speeds are you getting with that 36t?
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Old 10-02-2008, 11:44 AM
filestyle1's Avatar
Master Motorized Bicycle Builder
 
Join Date: May 2008
Location: Decatur,IL
Posts: 225
Default Re: Motor sprocket change

cruise 30 all day , top speed has been about 37-38 mph. depends which way the wind is blowing and if on flat ground or down hill.
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Old 10-03-2008, 02:00 PM
Home-made J's Avatar
Motorized Bicycle Apprentice
 
Join Date: Sep 2008
Location: Santa Cruz, CA
Posts: 10
Default Re: Motor sprocket change

I run a 34T from Andy's shop. For my town it works killer. I can do 30-35 mph at around 5000rpm on flat ground...cruising! If I want I can go full out 6500 rpm and hit 40mph no problem. Steep hills aren't an option, though, but I can still pedal assist up some medium grades. Also, you need to go a bit faster to start, and pedal into the engines comfort zone, or the clutch won't last too long. I'm a pretty big guy (6'4" 230lbs) and the 34T is a fun one.
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Old 10-03-2008, 07:22 PM
Motorized Bicycle Apprentice
 
Join Date: Sep 2008
Location: Lebanon, Mo.
Posts: 15
Thumbs up Re: Motor sprocket change

Thanks for everybodys help. I'll get a 36T on its way............
George
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Old 10-11-2008, 03:30 PM
Motorized Bicycle Apprentice
 
Join Date: Sep 2008
Posts: 11
Default Re: Motor sprocket change

Hey I have a 22" rear wheel with a stock 44T sprocket I haven't installed yet. Just wondering what size sprocket I should go with to get the best top speed. I really don't mind having to pedal up to that point, just as long as I get to cruise at a high speed. Thanks
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