SuzukiSavage.com - Cam chain tensioner revisited

Dave

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Re: Cam chain tensioner revisited
Reply #15 - 05/17/16 at 14:13:50

norm92de wrote on 05/17/16 at 13:39:51:

Does batman's idea seem too cavalier? It is so simple.

That method scares me....every tensioner in every cam chain in every engine I know about - is either locked in place (manual), or has a tensioner pawl that prevents the plunger from moving backwards........or has a hydraulic "shock" system that restricts sudden movements backwards.

Allowing the tensioner to flop around unrestricted - that just doesn't seem like a good idea to me.

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norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: Cam chain tensioner revisited Reply #16 - 05/17/16 at 14:20:50 Has anybody tried drilling a 'peephole' in the oil deflector. You could then eyeball the tensioner? Could you see enough?
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norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: Cam chain tensioner revisited Reply #17 - 05/17/16 at 14:25:05 I hear you Dave. Every engine! Playing the devils advocate. What do you think is a worst case scenario?
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Re: Cam chain tensioner revisited
Reply #18 - 05/17/16 at 14:30:13

I had thought of boring a hole in the side cover and fitting a big hydraulic tank sightglass to observe the chain, but can't really be bothered. Don't know whether that would be any use.
FWIW, the Honda cx500 has a manual chain tensioner that your supposed to adjust each time the valve clearances are done. It's easy and the side cover doesn't have to come off, though. It's often, is all.

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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28780 L.A. California Gender:	Re: Cam chain tensioner revisited Reply #19 - 05/17/16 at 14:35:09 Batman's mod you have to take on blind faith. and no sonar to sense what's going on either. This works for Batman, but will it work for you? zuki engineers put that pawl in there for a reason, maybe it went out with the 4 speed, maybe it didn't.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28780 L.A. California Gender:	Re: Cam chain tensioner revisited Reply #20 - 05/17/16 at 14:43:15 Serowbot wrote on 05/17/16 at 14:03:14: Anybody recall a broken chain?... I may be wrong. I believe we've had a couple of broken chains. Remember Yonuh Adisi?
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norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: Cam chain tensioner revisited Reply #21 - 05/17/16 at 16:10:01 One thing that occurs to me is that if the cam chain tension is high, so is the load on the cam bearings in the head. I hate it when that happens. :'(
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norm92de Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1180 El Paso TX Gender:	Re: Cam chain tensioner revisited Reply #22 - 05/17/16 at 16:14:04 Talking about 5th gear I sure wish it was 5 and a half!
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28780 L.A. California Gender:	Re: Cam chain tensioner revisited Reply #23 - 05/17/16 at 19:42:41 norm... slow down yer starting to studder.
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Ruttly

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Re: Cam chain tensioner revisited
Reply #24 - 05/17/16 at 19:57:33

Loose the ratchet and the spring , use a small rubber cup like one on a wheel cylinder from a car brake system and plumb a tiny hose from a oil galley to it and use oil pressure for suppling tension, still would need a light spring for tension when engine isn't running. Honda 90s use the same basic idea ! That my extreme remedy and my 2 cents worth !

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Art Webb Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3007 columbus, Texas Gender:	Re: Cam chain tensioner revisited Reply #25 - 05/17/16 at 20:55:10 norm92de wrote on 05/17/16 at 16:14:04: Talking about 5th gear I sure wish it was 5 and a half! That's sort of the problem, it's really more like 4th and a half than 5th
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batman

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Re: Cam chain tensioner revisited
Reply #26 - 05/18/16 at 21:29:19

dave ,dave,dave,...you trust the springs in your tensioner to be strong enough to push the plunger out but not enough to hold it there? you trust that the tiny little spring and tiny little paw to hold there ? I believe my large spring holds it in tension at all times,as for flopping around I have no indication,by way of sound or it,s performance that it is moving at all. IM a bit of a wicker and ride 60 on two lane mt. roads 70 on four lane div. highways,usually with my gal, total of 345lbs onboard.

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batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: Cam chain tensioner revisited Reply #27 - 05/18/16 at 21:36:42 maybe the Suzuki eng. designed the tensioner to fail ! so you would buy the next larger bike ,and the next beginner couldn,t buy yours !
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Re: Cam chain tensioner revisited
Reply #28 - 05/18/16 at 23:13:17

Dave gave us a picture of a Porsche tensioner,that restricts movement using hydraulic pressure which on first attempt failed,I'm waiting for my tensioner spring to fail ,but I'm a patient man. and thinking about the Porsche boxer engine a 180 degree flat six with duel over head cams their need for heavy duty tensioner on a chain that might be 8 feet long might be over kill for our bikes.

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Garry

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Re: Cam chain tensioner revisited
Reply #29 - 05/19/16 at 02:36:39

The cam chain tensioner on our bikes is connected to the guide at the bottom of the guide which may be leveraging the guide to flex in the centre and straighten slightly allowing the chain to lose tension and causing the tensioner to advance unnecessarily? Most other cam chain tensioners exert pressure on the centre of the guide which I would think is the most effective place to do it. There is nothing we can do about the placement of the tensioner but there is probably something we could do regarding strengthening the guide to limit flexing? Just a thought! Shocked

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