Vintage Dirt Bike Q & A

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 Post subject: different topends
PostPosted: Thu Apr 04, 2013 11:04 pm 
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Joined: Thu Mar 21, 2013 1:38 am
Posts: 55
Just wondering what larger cylinders will bolt to a mt125 lower case. just wondering if there is a feasable way of getting more cc's without too much trouble. not really wanting to go to extreme boring as i'd like to keep the original cylinder incase of going back to stock.


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 Post subject: Re: different topends
PostPosted: Fri Apr 05, 2013 5:47 am 
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Joined: Sun Nov 30, 2008 12:10 pm
Posts: 1010
Location: Connecticut, USA
The easiest and best way is to bolt in an MR175 motor, which uses nearly-identical cases and the same mounting bolt setup as the MT125. There will be the usual carb and ignition interfacing issues, but in this case they should be minor.

Ray

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'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric


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