Vintage Dirt Bike Q & A

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PostPosted: Wed Jun 02, 2010 2:14 pm 
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Joined: Wed Jun 02, 2010 2:10 pm
Posts: 2
I have a 250 Pursang Mk.4 (mod. 68) that I am hoping to restore. The block is still together, but I'm planning on doing a rebuild on it (bearings, seals, gaskets, etc.). The rod big end bearing is definitely shot, but I'm not sure how feasible/expensive it is to replace it - do I take it to a machine shop or bike shop to have it separated and pressed back together, then aligned? There are several cranks w/rods in decent shape on eBay, but I am not sure which various years/models are interchangeable. The same for the clutch, as the sprocket teeth are shot and i need to replace it.

Thanks for any help or advice!


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