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Help me, help out a student, please?

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Hi guys,

I'm a guidance counsellor at a high school and I'm trying to help out a student with an old (80 - 83) xr250. Nice kid and we've been working at it awhile. I'm usually pretty competent but I cant seem to figure out the cam chain on this thing.

A. The young man in question has bought a new Cam chain and now we can't seem to get it on the cam. i.e. it looks/feels too short?

B. Once we do get the chain on how do we tighten/loosen it. I believe my initial problem is because the tensioner is fully extended and I need to pull it back in. IS there a way to do this with it in the engine?

I know on the little XR's you just lift the tensioner out hook up the chain and then drop your tensioner back in.

Any tips/advise would be welcome and much appreciated I think this would be a great Xmas present for this young fellow.

This board has always been great and thanks for your help Fellas.

May you and yours have the best Christmas ever.:bonk:

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First of all, let's make sure of the year of the bike. There should be a plate on the steering head showing the year of manufacture.

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It's a 1980 but I think ?? from 78 -84 ther cam chain set up is the same isn't it?

Thanks for the tip bud!

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I was working on a 86' XL250 and I think I took the cam sprocket off put the chain on then attached the sprocket back to the cam.

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It's a 1980 but I think ?? from 78 -84 ther cam chain set up is the same isn't it?
Almost.

For USA, XR250 and XR250R models

84 CHAIN, CAM 14401-KK1-003

83 No XR250R

82 CHAIN, CAM 14401-428-003

81 CHAIN, CAM 14401-428-003

80 CHAIN, CAM 14401-428-003

79 CHAIN, CAM 14401-428-003

78 No XR250

Here's some additional info.

These sites show limited, but useful, info about XR250 and XR250R. Nice overview of the XR lineage:

http://www.cyclechaos.com/wiki/Honda_XR250R

http://www.cyclechaos.com/wiki/Honda_XR250

http://www.motorera.com/honda/h0250/xr250r/xr250r.htm

The R suffix is important.

Here's a good place to check part numbers:

http://sericehonda.com <-- linky

Click here: > B. Easy OEM <

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Thanks for the links fellas. I am sure he,ll enjoy the lineage links as well as the more detailed mechanical pics. Thanks so much for all your help boys.

Merry Christmas to you and yours guys!

This board rocks !!!

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