Decided to try and rebuild my 83 250r. just wondering how far i can safely overbore it? thanks for the help
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New to the board
Decided to try and rebuild my 83 250r. just wondering how far i can safely overbore it? thanks for the help
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'84 ATC 110
'84 200x
'85 350x
'86 125m
'03 Shadow ACE 750
'05 Brute Force 650
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It really depends on how much it has been bored in the past? If the cylinder is on it's original bore you have room for several more, unless the bore is scarred or grooved really bad. If the cylinder is on it's last bore, you will need to sleeve it.
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1986 ATC250R (sectional pipe and Klemm Research silencer)
1986 ATC250R (Desert Bike, WAX-ON seat, Dual Cibie lights, Steering Stabilizer)
1979 ATC110 (Bandito frame and forks, Turbo wheels, disc braked)
1982 ATC70 (Lifan manual 125)
1987 LT80 (piped, widened)
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Its .010 over at the moment.
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You can bore it out to .080. But if you are only at .010. IMO go to .020 or .030 depending on how the cylinder looks.
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81 250R- DG pipe,DG silencer, DG head, DG boost bottle, 34mm flatslide carb, UNI filter, Works shock, Nasa +5 axle
85 Tecate-
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