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How fast can your 80cc really go?

We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us. Also check out some of our racing members builds


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Old 08-15-2008, 02:31 AM
freshwater freshwater is offline
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Default 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?
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Old 08-15-2008, 05:18 AM
Scotty Scotty is offline
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Default Re: How fast can your 80cc really go?

Ive done 60mph on a bike without a motor, just find a big hill.
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Old 08-15-2008, 05:22 AM
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Default 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.
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Last edited by Venice Motor Bikes; 04-10-2009 at 09:02 AM.
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Old 08-15-2008, 05:46 AM
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Default 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.
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Old 08-15-2008, 06:29 AM
tylerlough tylerlough is offline
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Default 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.
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Old 08-15-2008, 06:43 AM
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Default 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!
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Old 08-15-2008, 07:10 AM
tylerlough tylerlough is offline
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Default Re: How fast can your 80cc really go?

More oil the better in my view, just switched over to 22:1 from 16:1
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Old 08-15-2008, 08:16 AM
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Default Re: How fast can your 80cc really go?

Quote:
Originally Posted by freshwater View Post
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)
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Old 08-15-2008, 09:19 AM
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jasonh jasonh is offline
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Default 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.
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Old 08-15-2008, 09:52 AM
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Default Re: How fast can your 80cc really go?

The highest I got on my stock HT was 34mph with a 44 tooth sprocket.
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