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Old 01-19-2014, 09:34 AM   #1
Boxtriker OP
Joined: Mar 2011
Location: Devon UK
Oddometer: 20
XL OR CB 250RS into a XR 250 Frame

Exhaust crush ring's honda 250 twin port single now as some mite no i have been putting a new motor in my xr 250 honda. the motor is a 83 CB 250 rs motor i think or was told when the cash passed hands well it has the rev take off on the cam cover that the xl never had ???? now to the problem the ports are od 32 x id 22-25 kind of size all i can find listed for the CB 250 rs is.O.D 40 X ID 31.5 WTF going on hear it's spun me right out is the motor an old xl 250 lump now they had small ports looked for the size of them an cant see them in that size for the xl either help been 2 hours looking at this now . this motor swap's been fighting me all the way never had to make so many one off bit's to get a motor in a frame bike now without it's bottom frame rail's an 30mm longer

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Old 01-20-2014, 03:20 AM   #2
Gnarly Adventurer
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Joined: Aug 2011
Location: Oxford, NT Hong Kong, Moscow
Oddometer: 323
any pictures?
sounds like all that Devonshire air has gotten to you

2009 Yamaha Jog 50RR LC sold 2011
2011 Rieju Marathon Pro 125 SM sold 2013
1990 Honda VFR 400 NC30 purchased 2013
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