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where can i find a 1980 CR250 Rod kit
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Author:  montywa [ Thu Nov 04, 2010 11:54 pm ]
Post subject:  where can i find a 1980 CR250 Rod kit
Race season is over and its time for a rebuild. I searched a bit and i had trouble finding a rod kit for the red rocket. Although one company in england was selling the same rod for 78-01 cr250. None of the other companies sell the same rod for the same years?? ANy help would be appreciated.

Thanks
Author:  b-joe [ Fri Nov 05, 2010 10:00 am ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
you can use all rodkits you can get for cr250 till 01.
they all have a crankpin that´s 60mm long but for 78-80 models you need a 58mm pin.
your rebuilder has to shorten it about these 2mm.
Author:  montywa [ Sat Nov 06, 2010 9:27 am ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
that pin is very hard i think, i have access to a full machine shop but i wonder if it could be shortened in a lathe?
Author:  b-joe [ Sat Nov 06, 2010 2:44 pm ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
this pin is hardned to 58-62 HRC.
it can be machined with a CBN tool.
Author:  redrocket190 [ Tue Nov 09, 2010 1:27 pm ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
http://www.racerstoystore.com/. Did two of my engines and dropped in an IMS Hot Rod kit from a later Honda.
Author:  montywa [ Wed Nov 10, 2010 1:52 pm ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
Well i ordered a newer rod kit, and a guy i race with is an expert machinist for a production shop. We were talking about how to shorten a pin that hard without marking the pin. He says he can put in on a magnetic table, and precision surface grind the 2mm off it no sweat. I am going to press apart one of my spare cranks and measure first then match it with the new pin. SHould be good to go!! Thanks for all the help guys.
Author:  montywa [ Wed Nov 10, 2010 1:53 pm ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
redrocket190 wrote:
http://www.racerstoystore.com/. Did two of my engines and dropped in an IMS Hot Rod kit from a later Honda.



Just to clarify, they didnt modify the pin at all? As in all that i just mentioned is a waste of time most likely?
Author:  redrocket190 [ Tue Nov 16, 2010 10:41 pm ]
Post subject:  Re: where can i find a 1980 CR250 Rod kit
Must have been a don't ask, don't tell thing.
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