Vintage Dirt Bike Q & A

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PostPosted: Thu Jul 08, 2010 9:27 am 
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Joined: Mon Dec 22, 2008 8:55 am
Posts: 5
I just ran across a cheap 76 TS400 and want to make a fun motocrosser out of it. I also just picked up a 74 TM400 top end I want to put on the TS. I heard the frame downtube may interfer with the exhaust so I may have to modify the downtube, but does anyone else have any advice on what other modifications they may do? Thanks in advance. Keith


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PostPosted: Tue Aug 10, 2010 5:58 am 
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Joined: Tue Aug 03, 2010 11:52 pm
Posts: 8
I replaced crankest and bottom bracket with a used Shimano 105 39/53 tooth. The gear ratios with the stock chain ring are too high. The 39 tooth front ring makes for a much more useful bike. and Replaced folding alloy pedals with Shimano SPD pedals. I prefer SPD pedals and cleats and the non-folding pedal is not an issue.

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