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05-05-2015, 12:52 AM,
#1
Adjusting/replacing cam chain tensioners?
I've ridden my 2005 v star 650 about 1500 miles now (~16,700 miles on it now, bought it beginning of January), and as long as I've had the bike it has rattled right at a favorite engine rpm, corresponding to around 30 mph in 4th, and then at about 40 mph in 5th. (It rattles at the same rpm in each gear, but 4th and 5th are the ones I remember the speeds for off the top of my head.) I feel it most strongly in the footboards, so it seems to be coming from the engine. I've read the cam chains can rattle if the tensioners are shot. Has anyone here had to do anything with the cam chain tensioners? I haven't been able to turn up any v star specific procedures on google. And I've read that Yamaha recommends the procedure be done by a "qualified technician," but wouldn't they for everything... From what I've read about other bikes and even cars it seems like replacing the tensioners is a simple fix...

So how can I confirm or eliminate the cam chain tensioners as the problem? And if they are, what do about it? If it's not the tensioners...what else could it be?
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05-05-2015, 06:43 AM, (This post was last modified: 05-05-2015, 06:46 AM by pauli466.)
#2
RE: Adjusting/replacing cam chain tensioners?
(05-05-2015, 12:52 AM)Crispy Wrote: I've ridden my 2005 v star 650 about 1500 miles now (~16,700 miles on it now, bought it beginning of January), and as long as I've had the bike it has rattled right at a favorite engine rpm, corresponding to around 30 mph in 4th, and then at about 40 mph in 5th. (It rattles at the same rpm in each gear, but 4th and 5th are the ones I remember the speeds for off the top of my head.) I feel it most strongly in the footboards, so it seems to be coming from the engine. I've read the cam chains can rattle if the tensioners are shot. Has anyone here had to do anything with the cam chain tensioners? I haven't been able to turn up any v star specific procedures on google. And I've read that Yamaha recommends the procedure be done by a "qualified technician," but wouldn't they for everything... From what I've read about other bikes and even cars it seems like replacing the tensioners is a simple fix...

So how can I confirm or eliminate the cam chain tensioners as the problem? And if they are, what do about it? If it's not the tensioners...what else could it be?
sounds like your luging the engine at 40 in 5th rpms are way to low causing vibrations the best power band on a 650 engine is around 2500 to 4000 rpm. in other words don't strain the engine. or it will shake. also chain tensioners are not adjustable and rarely wear out. the guides may wear after 100,000 miles
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05-05-2015, 10:17 AM,
#3
RE: Adjusting/replacing cam chain tensioners?
My understanding is that the chain tensioner is self-adjusting though I have heard of them sticking. Even if a chain tensioner was shot though I don't think it would cause the problem you describe. Something pretty heavy has got to be out of sorts if you're feeling the vibration in the floorboards.

Does it happen only under heavy load as when accelerating fairly hard or climbing a hill? Pauli is right about lugging it if the is throttle mostly open at those speeds in those gears when you experience the vibration. BTW, if you're shifting at the points recommended in the manual...stop that! Seriously, the manual lists shift points that are way, way to low unless you only weigh 90 pounds and are always riding down hill...

But, if the vibration happens even when more-or-less coasting along it's not a case of lugging. My 650 is perfectly happy to hum along at 40 in fifth unless I'm climbing a hill or accelerating...and I weight a "bit" more than 90 pounds... LOL
===========================
2011 V-Star 650 Custom (new in fall 2013)
V&H Cruzer Pipes, Memphis Shades Bat Wing, Floorboards, Highway Bars,
Locking Bags, Tail Rack, LED Signals & Aux Brake Lights, Headlight Modulator,
Brake Light Modulator, 5/8" Gel Pad Under Upholstery.
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05-05-2015, 06:02 PM, (This post was last modified: 05-05-2015, 06:08 PM by pauli466.)
#4
RE: Adjusting/replacing cam chain tensioners?
(05-05-2015, 10:17 AM)OldePhart Wrote: My understanding is that the chain tensioner is self-adjusting though I have heard of them sticking. Even if a chain tensioner was shot though I don't think it would cause the problem you describe. Something pretty heavy has got to be out of sorts if you're feeling the vibration in the floorboards.

Does it happen only under heavy load as when accelerating fairly hard or climbing a hill? Pauli is right about lugging it if the is throttle mostly open at those speeds in those gears when you experience the vibration. BTW, if you're shifting at the points recommended in the manual...stop that! Seriously, the manual lists shift points that are way, way to low unless you only weigh 90 pounds and are always riding down hill...

But, if the vibration happens even when more-or-less coasting along it's not a case of lugging. My 650 is perfectly happy to hum along at 40 in fifth unless I'm climbing a hill or accelerating...and I weight a "bit" more than 90 pounds... LOL
your right 40 in 5th is ok if your not looking for torque. 40 on my 650 is the bare minimum for 5th it. bucks a little under that

(05-05-2015, 06:02 PM)pauli466 Wrote:
(05-05-2015, 10:17 AM)OldePhart Wrote: My understanding is that the chain tensioner is self-adjusting though I have heard of them sticking. Even if a chain tensioner was shot though I don't think it would cause the problem you describe. Something pretty heavy has got to be out of sorts if you're feeling the vibration in the floorboards.

Does it happen only under heavy load as when accelerating fairly hard or climbing a hill? Pauli is right about lugging it if the is throttle mostly open at those speeds in those gears when you experience the vibration. BTW, if you're shifting at the points recommended in the manual...stop that! Seriously, the manual lists shift points that are way, way to low unless you only weigh 90 pounds and are always riding down hill...

But, if the vibration happens even when more-or-less coasting along it's not a case of lugging. My 650 is perfectly happy to hum along at 40 in fifth unless I'm climbing a hill or accelerating...and I weight a "bit" more than 90 pounds... LOL
your right 40 in 5th is ok if your not looking for torque. 40 on my 650 is the bare minimum for 5th it. bucks a little under that. does your tranny growl when straining the eng? mine does. just a little til it picks up speed.im thinking that may be what he's talking about. the only other thing I know of are the AIS box man are they noisy. like a chirping belt.
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08-08-2016, 05:27 PM,
#5
RE: Adjusting/replacing cam chain tensioners?
Crispy, did you ever find the cause of this issue? I have the same issue that you describe.
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08-26-2016, 10:04 PM,
#6
RE: Adjusting/replacing cam chain tensioners?
I'm exploring the idea of dealing with both my tensioners. I believe they're spring loaded as mentioned in my Clymer's manual. A buddy just told me that the plunger can drop down when trying to replace the think which would turn into a much bigger job. He also said that the cam chain has got to be slack when loosening up on the center bolt re reset the plunger tighter against the chain. Not sure if that is accomplished when adjusting the valves with piston at TDC on compression stroke. I'd really like to get rid of some of my chain clatter. It gets annoying now that I installed my quiter, original exhaust pipes.
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