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How fast can your 80cc really go?
Discussion at Motorized Bicycle Engine Kit Forum in the High Performance Bicycle Engine Tips forum. The makers of the engine claim that the motor can do 35 mph, but can it really go that fast ...  | | 
08-15-2008, 03:31 AM
| | Motorized Bicycle Member | | Join Date: Aug 2008
Posts: 22
| |  How fast can your 80cc really go?
The makers of the engine claim that the motor can do 35 mph, but can it really go that fast or even faster? How fast have you gotten your bike to and what did you do to make it go that fast? |
08-15-2008, 06:18 AM
| | Motorized Bicycle Member | | Join Date: Jul 2008 Location: Melbourne Australia
Posts: 32
| | Re: How fast can your 80cc really go?
Ive done 60mph on a bike without a motor, just find a big hill.  |
08-15-2008, 06:22 AM
|  | Custom Builder / Dealer | | Join Date: Mar 2008 Location: Los Angeles, CA.
Posts: 1,434
| | Re: How fast can your 80cc really go?
I can make my bikes go over 40 MPH with a sprocket, match porting, exaust mod & jetting.
Last edited by Venice Motor Bikes : 04-10-2009 at 10:02 AM.
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08-15-2008, 06:46 AM
|  | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,081
| | Re: How fast can your 80cc really go?
I have gone over 40 mph, but not checking with a GPS, only a cars speedometer.
Depending on the engine, and other factors, plus figuring it's up around "self destruct" on the rpm range, I would not suggest long high rpm runs.
__________________
If it ain't broke, and you mess with it long enough, it will be. |
08-15-2008, 07:29 AM
| | Motorized Bicycle Senior Member | | Join Date: May 2008 Location: Mishawaka, IN
Posts: 89
| | Re: How fast can your 80cc really go?
I've done 28 with a 50 tooth sprocket, that means my engine was spinning over 7000 rpms. When I get my 33 tooth that would be 42 mph. I don't advise spinning the engine that fast for more than a few seconds. |
08-15-2008, 07:43 AM
| | Custom Builder / Dealer | | Join Date: Mar 2008 Location: Los Angeles, CA.
Posts: 1,434
| | Re: How fast can your 80cc really go?
I run them at full speed for miles at a time!! So far all the engines are fine.
I mix my fuel at 25/1 after break-in, just to be safe! |
08-15-2008, 08:10 AM
| | Motorized Bicycle Senior Member | | Join Date: May 2008 Location: Mishawaka, IN
Posts: 89
| | Re: How fast can your 80cc really go?
More oil the better in my view, just switched over to 22:1 from 16:1 |
08-15-2008, 09:16 AM
|  | Master Bike Builder & Forum Sponsor | | Join Date: Dec 2007 Location: Duvall, WA PNW
Posts: 2,683
| | Re: How fast can your 80cc really go?
Quote:
Originally Posted by freshwater  The makers of the engine claim that the motor can do 35 mph, but can it really go that fast or even faster? How fast have you gotten your bike to and what did you do to make it go that fast? | 40 mph seems to be the practical limit. Mild tuning will get you there quite easily with a 67cc. Always pushing the engine limit, not gear ratio (with the kit) |
08-15-2008, 10:19 AM
|  | Motorized Bicycle Elite Member | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 1,597
| | Re: How fast can your 80cc really go?
Well with my stock setup I've only gotten up to around 28 or so on the flat. I'm a bit heavier than the average Joe though, so that might have something to do with it. |
08-15-2008, 10:52 AM
|  | Santa Cruz Scooter Works | | Join Date: Jan 2008 Location: Nor*Cal
Posts: 952
| | Re: How fast can your 80cc really go?
The highest I got on my stock HT was 34mph with a 44 tooth sprocket. | | Thread Tools | | | | Display Modes |  Linear Mode | 
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