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How fast can your 49cc 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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  #1  
Old 02-22-2009, 03:19 AM
stv1jzgte stv1jzgte is offline
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Default How fast can your 49cc Really go?

I have seen the 67cc(80cc) speed from 25-50mph but how fast have you gotten your 49cc bike to?
with a lil tweeking ive gotten up to 47kmh 30mph on flat ground!
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Old 02-22-2009, 09:47 AM
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Default Re: How fast can your 49cc Really go?

I have not ridden mine enough to break it in yet (winter) but so far it goes 25 mph no problem. I am believeing it will go just as fast as the 70cc kits, they just have a little more torque.
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Old 02-24-2009, 01:39 PM
Etacovda Etacovda is offline
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Default Re: How fast can your 49cc Really go?

i had mine at 47km without any tweaking.
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Old 02-25-2009, 06:26 AM
cnico cnico is offline
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Default Re: How fast can your 49cc Really go?

my 48cc will sit on 55km/h on the flat but with a little tail wind it will sit on 60km/h, top speed down a moderate hill has been 68km/h
only mods that i have done is matched the inlet and exhaust manifolds to the ports removing any burs, leaned of the carby as the stock carby is the same for both 66cc and 48cc (much to rich for the 48cc), fitted an expansion chamber off a 48cc pocket bike and changed the rear sprocket from the stock 44 tooth down to a 28 tooth
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Old 02-25-2009, 06:32 AM
stv1jzgte stv1jzgte is offline
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Default Re: How fast can your 49cc Really go?

51.0kmh now! haha
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Old 02-28-2009, 08:46 PM
Creative Engineering Creative Engineering is offline
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Default Re: How fast can your 49cc Really go?

I'll say 52-58 MPH installed in the right bike...engine slightly prepped...no billet replacement parts, just machine work on the existing parts...and a light weight rider, (160 or less), with a shorty plexi fairing.

Jim
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Old 02-28-2009, 10:41 PM
stv1jzgte stv1jzgte is offline
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Default Re: How fast can your 49cc Really go?

Quote:
Originally Posted by Creative Engineering View Post
I'll say 52-58 MPH installed in the right bike...engine slightly prepped...no billet replacement parts, just machine work on the existing parts...and a light weight rider, (160 or less), with a shorty plexi fairing.

Jim
Not a pipe dream thread! How fast can your 49cc really go? Maufacture says.... 30-35kmh 21.7mph
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Old 02-28-2009, 10:56 PM
stv1jzgte stv1jzgte is offline
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Default Re: How fast can your 49cc Really go?

Quote:
Originally Posted by Bikeguy Joe View Post
I am believeing it will go just as fast as the 70cc kits, they just have a little more torque.
As im sure you know its dam near impossible it incress torque without incressing power.
Every distributor that ive seen that sells these kits in Australia and the States, power figures are always higher for the 80cc70cc whateva so of course Torque will be a little more!

Do the same mods to a 49cc and an 80cc i guarantee you the 80 will have a higher top speed!

steve
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Old 02-28-2009, 11:36 PM
Creative Engineering Creative Engineering is offline
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Default Re: How fast can your 49cc Really go?

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Originally Posted by stv1jzgte View Post
Not a pipe dream thread! How fast can your 49cc really go? Maufacture says.... 30-35kmh 21.7mph
Moderate machine work will make a world of difference in the perfomance!

50+ MPH is easily doable if you have the balls to ride it!...My race car engine customers ask me all the time "what about this", "what about that", I tell them sure...just hang on...it's going to be a ride!!!

Jim
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Old 02-28-2009, 11:56 PM
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Default Re: How fast can your 49cc Really go?

Quote:
Originally Posted by stv1jzgte View Post
As im sure you know its dam near impossible it incress torque without incressing power.
Every distributor that ive seen that sells these kits in Australia and the States, power figures are always higher for the 80cc70cc whateva so of course Torque will be a little more!

Do the same mods to a 49cc and an 80cc i guarantee you the 80 will have a higher top speed!

steve
Yes, but we are speaking of motors with no mod.
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