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Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance.

piston probs


Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle Trouble Shooting forum. hello all. ive been riding my 80cc motor i bought used from ebay for almost 7 months with no probs . ...
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Old 11-14-2009, 01:34 PM
Motorized Bicycle Newbie
 
Join Date: Apr 2009
Location: El Paso tx
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Default piston probs

hello all. ive been riding my 80cc motor i bought used from ebay for almost 7 months with no probs . my mistake was i ordered 80 cc piston rings and installed them . i droped my cyclinder and did not notice a hair line crack. so when i put it together and started it the piston froze. i tried to take it apart and broke the piston when i was knocking it out. so i had a broken piston and cycinder . so i borrowed both parts from another 80 cc motor .. there the same diameter but the new piston is taller and hits my head. what do i do to find a new piston and jug for this motor ?
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Old 11-14-2009, 01:47 PM
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Default Re: piston probs

Do you remember who you bought your engine from on ebay? Email them and ask them about the parts..

Or you could order a piston from thatsdax..
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Old 11-14-2009, 02:08 PM
Motorized Bicycle Newbie
 
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Location: El Paso tx
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Default Re: piston probs

no i cant get hold of the old owner. the diameter of my piston is 46.8 mm wide and 46.4 mm tall
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Old 11-15-2009, 12:18 AM
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Default Re: piston probs

At this point, it's probably easier (& cheaper) to just buy another engine!! (seriously!)
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Old 11-15-2009, 01:52 PM
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Default Re: piston probs

Yep gotta agree with him actually^^ You might get the wrong parts and waste more money..

Just keep this engine for spare parts and get a new engine?

Order just a replacement engine not the whole kit

thatsdax has them..
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Old 11-17-2009, 06:59 PM
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Default Re: piston probs

yeah it would .. but for some reason this motor goes ten miles per hour faster than my 80cc ebay motor thats brand new
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Old 11-18-2009, 02:47 AM
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Location: Ontario
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Default Re: piston probs

ah, but that moor doest got 10mph faster anymore..... hate bursting bubbles like that buddy but with top end damage like that reparing it wont give you the same speed..... 7 months you said? break in will give you that much more speed. that engine's toast....

sorry man buy a replacment i have to do the same thing for when mine goes
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Old 11-18-2009, 08:35 AM
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Default Re: piston probs

Quote:
Originally Posted by bk_punisher View Post
yeah it would .. but for some reason this motor goes ten miles per hour faster than my 80cc ebay motor thats brand new
The reason is it's broken in.. The new one will go just as fast after break in period..

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Old 11-18-2009, 08:30 PM
Motorized Bicycle Newbie
 
Join Date: Apr 2009
Location: El Paso tx
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Default Re: piston probs

well thanks guys. i guess ill did a grave for the beast........
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