Bike frame too big

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Judebox

New Member
Nov 13, 2019
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Hello, I bought an "80cc" engine kit off ebay, My bike has plenty room for the engine, but the problem is that its an aluminium frame, so the bar going diagonal is too thick. The adaptor that came with it is just a little bit too small. Can I do anything about this? My bike is similar to the one below
 
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Zeldanumber17

New Member
Oct 26, 2019
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Only way I know how to conquer this. Drill a hole in that plate that comes in the kit. As well as a hole in the bike frame. use a big bolt and nut. I’ve only done this to steel frame bikes. Might be an issue with aluminum frame not sure though. Someone else might know.
Cheers
 
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Judebox

New Member
Nov 13, 2019
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Zeldanumber17 said:
Only way I know how to conquer this. Drill a hole in that plate that comes in the kit. As well as a hole in the bike frame. use a big bolt and nut. I’ve only done this to steel frame bikes. Might be an issue with aluminum frame not sure though. Someone else might know.
Cheers
Click to expand...
Thanks for the Idea, Ill get to it in the morning
 
Venice Motor Bikes

Venice Motor Bikes

Custom Builder / Dealer/Los Angeles
Mar 20, 2008
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DO NOT DRILL THE FRAME!!!!!!
Get yourself a little piece of steel & a larger U bolt (& make a new front mount!
You should also cut a 'half moon' piece of pipe to use between the U bolt & the frame to protect the frame. ;)
 
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indian22

indian22

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Dec 31, 2014
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Jude auto parts stores have larger sizes. The bike vendors that advertise in our forum also have clamps that will fit. Slow down and do it with the correct parts.


Rick C.
 
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curtisfox

Well-Known Member
Dec 29, 2008
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Yes Rick is right, slow down, don't get in a big hurry, if you do you will have a bunch of problems and fixens down the road. Kits are designed for stander-ed bikes, and must be mounted solid, no rubber........Curt
 
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Venice Motor Bikes

Venice Motor Bikes

Custom Builder / Dealer/Los Angeles
Mar 20, 2008
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One more thing you should check.... Set the engine in the frame & turn the pedals to be sure the pedals don't hit the engine!
Those skinny tire bikes sometimes have narrower cranks than other bikes
 
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Judebox

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Nov 13, 2019
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Venice Motor Bikes said:
One more thing you should check.... Set the engine in the frame & turn the pedals to be sure the pedals don't hit the engine!
Those skinny tire bikes sometimes have narrower cranks than other bikes
Click to expand...
after a few turns of the the pedals,luckily, Im fairly sure they dont. Though It is quite close
 
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