Timing tensioner adjustment? - Honda Rincon Forum : RinconRiders Honda Rincon Forums
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post #1 of 11 (permalink) Old 09-15-2011, 10:31 AM Thread Starter
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Timing tensioner adjustment?

Hello all, I have a '05 650 trx650fa and while it was sitting idling it died, turns out the timing chain tensioner broke off and threw the chain. I have replaced the chain and tensioner and am in the process of putting everything back together and was looking through my Honda service manual and it has no specs on the tensioner that I can find.

Can some one enlighten me on the tensioner specs? How often does it need to be adjusted?

Thanks in advance.
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post #2 of 11 (permalink) Old 09-15-2011, 11:16 AM
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When I installed my cam, I recall it being spring tension, self adjusting type from the left side of the motor, like most Hondas.
Most important make sure the cam is aligned right.

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post #3 of 11 (permalink) Old 09-15-2011, 02:08 PM
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The tensioner is a ratcheting type. Remove it. Take a key or small screw driver and retract plunger. A manual will tell you how and it takes too much time to explain here...do a little home work.

After retracting, let the plunger out slowly with your thumb on it and as it comes out under internal spring tension it should lock into place at any point if you put pressure on it with thumb.

That is how to make sure its good. If not sure...be sure replace it.


This is critical...when installing tensioner back onto cylinder head, the plunger must be fully retracted and held there until the tensioner assembly is bolted down properly. Then release key and plunger will self adjust against the timing chain guide. If you screw up and install it with plunger completely out you will likely break something inside or have way too much tension on your new cam chain.

If this is confusing get some more help...Im on my way to Florida by motobike in a few days and will not be around.

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post #4 of 11 (permalink) Old 09-15-2011, 03:02 PM Thread Starter
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After getting the cam in and chain on I noticed there was no tension on the chain at all so I pulled the tensioner lifter is what my manual called it, out and the plunger is back (retracted) and has only about 1/8 in movement. This is may be why the tensioner broke in the first place.
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post #5 of 11 (permalink) Old 09-15-2011, 04:31 PM
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Could be. The tensioner lifter (plunger) should move out about 3/8 inch or even a little more.

What troubles me is the tensioner lifter should have been removed until the new chain and guides are back in, then reinstalled if working, released, and allowed to take up slack.

If the lifter plunger does not have something to push against (the chain guide) it would come all the way out and lock into place (fully extended).

I hope your tensioner lifter is bad. And several have stuck and/or failed causing issues.

Good Luck

2003 green Rinny (11,800 miles), "25" Bighorn Radials (white letters out) full of extra slime, water pump mod, no warning labels, E Trex, everything else like Mr. Honda made it. 2000 XR 400r (est 3,500 miles). RIDE RED EVEN IF ITS GOT GREEN PLASTIC!

2013 Yamaha Super Te'ne're' (7,400 miles in 4 months), 1996 Toyota Tacoma 4x4 (365,000 miles) on tight and original motor. 2001 4Runner (79,000 miles).
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post #6 of 11 (permalink) Old 09-15-2011, 04:55 PM Thread Starter
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Yep, I took it apart the spring inside was broken, looked online and i guess it has to be purchased as a unit, can't get just a spring. Now I wait...

Thanks for the help, forums are great tools to learn from, the Honda factory manual leaves a lot to be desired, wish Clymer had one.
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post #7 of 11 (permalink) Old 06-17-2015, 02:54 PM
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corndog....your a pure genius...interesting trick to get plunger to stick.....all I did was clean mine....suddenly very quiet...
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post #8 of 11 (permalink) Old 06-17-2015, 06:27 PM
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Corndog, where in Florida are you heading.

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post #9 of 11 (permalink) Old 06-21-2015, 04:57 PM
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Quote:
Originally Posted by Joe maran View Post
Corndog, where in Florida are you heading.
Just wanted to mention that Corndogs trip to Florida was in 2011....older post.
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post #10 of 11 (permalink) Old 06-21-2015, 07:14 PM
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I'm sorry I didn't realize I live in hope sound on the East Coast of South Florida there's three main roads lone is US one I live one block off of US one, The other is 95 I'm 2 miles off 95, the third is turnpike I'm 2 1/2 miles off the turnpike. I figured I'd be a good host I'm also half-mile off the beach if anything a quick stop for a cold one just a thought.

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2007 Rincon camo, 12in ITP rims (black), 26in mudlites ,the rest stock for now.
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