Put this 4th over one in and run it until you need to re-bore then either get it plated back to this size or go to YZ400 STD. If your current 2nd OS bore is just worn and lost the proper fit plate it back to the proper size for 2nd, the plated bores hold up fantastic and is the way to go for vintage racing, U.S Chrome and Milleneum Technologies in the states, you should have someone in the UK doing it also. https://www.ebay.com/itm/284384136993?hash=item42369d8f21:g:QKUAAOSwlbF…
Put this 4th over one in and run it until you need to re-bore then either get it plated back to this size or go to...
Put this 4th over one in and run it until you need to re-bore then either get it plated back to this size or go to YZ400 STD. If your current 2nd OS bore is just worn and lost the proper fit plate it back to the proper size for 2nd, the plated bores hold up fantastic and is the way to go for vintage racing, U.S Chrome and Milleneum Technologies in the states, you should have someone in the UK doing it also. https://www.ebay.com/itm/284384136993?hash=item42369d8f21:g:QKUAAOSwlbF…
https://www.ebay.com/itm/284384136993?hash=item42369d8f21:g:QKUAAOSwlbF…
https://speedandsportinc.com/
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