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spud

mountain bike, powered by gas engine

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Gary Fisher mountain bike with a 49cc gas motor could be larger cc not sure, it's fast. This one will get you out in the hills and back $350.00

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Edited by spud
add price
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Most of those Chines Engine are unmarked 66cc.   Listed as 80cc the chines include the Combustion chamber in they're calculations.   Pop that head off, Replace the Head Gasket and torque down .  

Is the ex-host port like 40mm or 32 ?? 

"" 
A good rule of thumb is to shoot for 8mm head bolts @ 120 to 140 inch pounds. For all other engine fasteners, 6mm, set your torque wrench to 60 to 80 inch pounds. Those values will keep you out of trouble.  ""

Replacement Parts can be had DIRT Cheap for the things.  

 

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There are like three versions of piston they use in those things. This one is the most common.

https://www.ebay.com/itm/47mm-66-80CC-Gas-Motorized-Bicycle-Bike-Engine-parts-1-1-16-type-B-Piston-KIT/191722418481?hash=item2ca38bf131:g:SLkAAOSwe-FU94~q:sc:USPSFirstClass!88030!US!-1:rk:1:pf:0   

 

Edited by homefire

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Sounds like lawn equiptment

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Actually you can get them to quiet right up.   If Bike Berry Sells it , you can get it for half the price on E-Bay   ..

 

 

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Thanks, Hopefully, someone  can put this to use, I have a new hip and  not taking any chances  of falling 

 

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sold

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