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Author Topic: 1989 cr 250 clutch cover  (Read 2334 times)

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Offline evo550

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1989 cr 250 clutch cover
« on: January 10, 2012, 08:13:04 pm »
I was reading on another forum, a fix for earlier cr 250 (85 to 88)water pump corrosion is to fit a clutch cover from a '89 as these are aluminum and still available. Can anyone confirm that the '89 cover was aluminium ? I had a 500 but those covers where mag.
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Offline motomaniac

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Re: 1989 cr 250 clutch cover
« Reply #1 on: January 10, 2012, 10:35:23 pm »
I dont think that that is correct. I think they are all mag , anyway the later ones are different in that they have a seperate removable clutch cover  and different bits to activate the power valves
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STW996

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Re: 1989 cr 250 clutch cover
« Reply #2 on: January 11, 2012, 07:02:25 am »
I have a 89 250 and have just had to devcon the case. the fact is they all have a percentage of magnesium in them, these have less than the older 84 cases did but due to their age and what we put in them it will always be a problem.

Some of my 84 cases are pretty bad and have used devcon and work well.
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Offline Hoony

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Re: 1989 cr 250 clutch cover
« Reply #3 on: January 11, 2012, 06:14:18 pm »
Quote from: evo550 on January 10, 2012, 08:13:04 pm
I was reading on another forum, a fix for earlier cr 250 (85 to 88)water pump corrosion is to fit a clutch cover from a '89 as these are aluminum and still available. Can anyone confirm that the '89 cover was aluminium ? I had a 500 but those covers where mag.

 i read this too EVO (may have been on "CR500riders")
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Offline evo550

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Re: 1989 cr 250 clutch cover
« Reply #4 on: January 15, 2012, 05:50:07 pm »
No Hooney I read it on vitalmx, the info on cr500riders is a fix for the early 500's, I've been checking out a few different covers for the 250's and it seems the covers changed around the power valve mechanism the same time clutch cover became removable (went from a small 8mm hex head bolt to a large flat screwdriver bolt), question is can the later removable cover be substituted with an earlier model non removable clutch ie fit an '86 cover to an '87 ?
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CamP

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Re: 1989 cr 250 clutch cover
« Reply #5 on: January 28, 2012, 04:30:28 am »
Quote from: evo550 on January 15, 2012, 05:50:07 pm
No Hooney I read it on vitalmx, the info on cr500riders is a fix for the early 500's, I've been checking out a few different covers for the 250's and it seems the covers changed around the power valve mechanism the same time clutch cover became removable (went from a small 8mm hex head bolt to a large flat screwdriver bolt), question is can the later removable cover be substituted with an earlier model non removable clutch ie fit an '86 cover to an '87 ?

I have friends that race '87 and '88 CR250's. Both have installed '91 CR250 clutch side covers on their bikes.
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