Cam chain tensioner Fourtrax 250 - Honda ATV Forum
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post #1 of 8 (permalink) Old 10-16-2010, 08:44 PM Thread Starter
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Cam chain tensioner Fourtrax 250

Hi everyone, does anyone know if there is a way to adjust the tension on the cam chain of a 1985 Fourtrax 250? Is the tensioner replaceable? Thanks
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post #2 of 8 (permalink) Old 10-16-2010, 08:55 PM
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Yes, the tensioner is replaceable, but the following shows how to install it. If it still doesn't tension the chain enough, you will need a new chain.

Click the image to open in full size.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #3 of 8 (permalink) Old 10-16-2010, 09:01 PM Thread Starter
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Thanks Helmut, do you know the part # or where to get the tensioner?
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post #4 of 8 (permalink) Old 10-16-2010, 09:16 PM
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Quote:
Originally Posted by cablerum View Post
Thanks Helmut, do you know the part # or where to get the tensioner?
Bad news, I just tried to look up the part number for the tensioner and it seems that they have been discontinued. You might be able to locate one on Ebay.

The '87 had a different tensioner and it might fit, I'm not sure. The two tensioners look completely different, but the gasket looks like it's shaped about the same. The cylinder might be made the same where the tensioner bolts to it. Here is what the '87 tensioner looks like.

Click the image to open in full size.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #5 of 8 (permalink) Old 10-16-2010, 09:23 PM
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Yes, the '87 tensioner should work on the '85 cylinder, because the part numbers for both the '85 cylinder and the '87 cylinder are the same.

The part number for the '87 tensioner is Honda part #14520-HA0-771.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #6 of 8 (permalink) Old 10-16-2010, 09:54 PM Thread Starter
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Thanks again...do you know of a place to order this part for a good price or is it a trip to the dealer?
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post #7 of 8 (permalink) Old 10-16-2010, 09:58 PM
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yep heres the link Honda Power Equipment, Honda Motorcycles, California Sidecar - Honda Powersports Parts Springdale, AR (888) 853-8468 they ship fast and cheap

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post #8 of 8 (permalink) Old 10-17-2010, 10:41 PM
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like helmut said..replacing the tensioner won't always solve your problem..if your timming chain is too far stretched..it won't matter how many tensioners you put on it..you still will need a new timming chain..the tensioners on these atv's hardley ever go bad..most times..it's the chain..or timming chain guides.

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