Cool vintage race bike

guernz

Been Around the Block
Was at Unadilla MX Rewind. The bike was hauling. Wish I took more pics. Thought some or you cats would enjoy.
 

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Jawa speedway engine from what I can tell. Wonder what gearbox they are using.
 
I think it was a old British thing with mods to shift on the left. Very cool bike.
 
Likely to be an AMC gearbox Brodie. Standard fitting for a Norton and used on all Japs/Jawas with a gearbox. The right hand shift is a nice touch but the exhaust looks like a lot of work to end up on the same side - must be a reason for that...
 
Probably tuned length for the pipe.

I was wondering about the top mount section of the box.
 
Good question, need to see it from the other side. Looks like just some auxiliaries for mounting the pipe, bit hard to tell.
 
It looks like a two valve Jawa. I don;t think they've gotten around to allowing four valve engines yet.
 
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