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Author Topic: Husky 701 Cam Chain Tensioner  (Read 507 times)

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Offline BuRP

Husky 701 Cam Chain Tensioner
« on: June 12, 2018, 09:57:52 pm »
My bike when warm on startup sometimes makes quite a racket due to the camchain rattling.
This goes away after a varying-length while, I guess up to 30 seconds, when the hydraulic tensioner starts to do its work.
Bike's a 2018 model, 1200km on odo, oil's renewed twice already, filters once.
Anyone has this also?
Is there a cure for it, other than buying the mechanical tensioner offered on the net?
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline w@nted

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Re: Husky 701 Cam Chain Tensioner
« Reply #1 on: June 13, 2018, 08:22:45 am »
This is common on the 701. Mine does it as well, makes a noise, especially during startup when the engine is hot. After about 15 seconds it is quiet again. After the first service, the dealership put fully synthetic 10W60 oil in, which is supposed to help with this noise a bit. I did not hear a difference, noise is still there for a few seconds.
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Offline spankme

Re: Husky 701 Cam Chain Tensioner
« Reply #2 on: June 18, 2018, 12:36:35 pm »
Hedley in cape town had some solution but never got round to it.
 

Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #3 on: June 18, 2018, 06:06:15 pm »
Hedley is a member here, or a business?
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #4 on: June 21, 2018, 11:52:44 am »
Sent hedleyj a PM regarding this, can't find any post from him on this subject though.
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline Welsh

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Re: Husky 701 Cam Chain Tensioner
« Reply #5 on: June 21, 2018, 12:09:36 pm »
Sent hedleyj a PM regarding this, can't find any post from him on this subject though.

Try Heddles.  8)
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Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #6 on: June 21, 2018, 12:37:11 pm »
Thanks, done so, he's the correct dude it seems.
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #7 on: June 21, 2018, 12:40:31 pm »
Refer my post here: http://www.wilddog.za.net/forum/index.php?topic=211243.0

I've asked Heddles, who must have seen many failed std units by now, why the OEM units fail.
If that can be improved on I rather fix that than putting a mechanical one in.
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline SparkMark

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Re: Husky 701 Cam Chain Tensioner
« Reply #8 on: September 14, 2018, 03:24:16 pm »
So this past weekend mine has started to make a noise ... 3500 km's on the clock.

Dropped it off with E2R for them to have a look.

My speedo also stopped working.
 

Offline BiG DoM

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Re: Husky 701 Cam Chain Tensioner
« Reply #9 on: October 20, 2018, 08:05:09 pm »
What was the prognosis and remedy on this?
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Offline SparkMark

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Re: Husky 701 Cam Chain Tensioner
« Reply #10 on: October 21, 2018, 07:01:27 pm »
They checked it, said it was fine.
 

Offline BiG DoM

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Re: Husky 701 Cam Chain Tensioner
« Reply #11 on: October 21, 2018, 08:44:28 pm »
They checked it, said it was fine.

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"Love is the feeling you get when you like something as much as your motorcycle" - Hunter S. Thompson

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Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #12 on: October 22, 2018, 08:37:54 am »
They checked it, said it was fine.

Mine is also fine: at times (when started warm) it makes a hell of a racket for a disturbingly long time... but then eventually goes away as some oilpressure mysteriously finds its way to the tensioner. This can be up to a minute, a really long time.
They checked it, which probably means: they waited until the racket subsided, and then triumphantically exclaimed "See? Gone! It's fine"

The absence of a bit of oilpressure (this tensioner-thing does not need a lot) for such a long time is a serious problem, mainly because the rest of the engine - read: crank, conrod, piston, cams etc - cannot have sufficient oil pressure either!
So, I suppose we should consider ourselves lucky that the cam makes a big racket when there's hardly any oilpressure, so we can actually hear the engine's not happy at all, and then those with some brain will let their engine idle until there is pressure, audibly so!
Lucky?
Yeah, bad luck, but that's still lick innit?

KTM should address this problem, for a genuine problem it IS!  >:D

Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #13 on: October 22, 2018, 08:45:40 am »
The absence of some oilpresssure which causes the tensioner to slacken the chain which then protests LOUDLY is the reason why installing a (aftermarket) mechanical tensioner is a patently bad idea.... because, by doing that you deprive yourself of the only feedback the engine has, the racket it makes when there's no oilpressure!

This engine has 2 oilpumps & 2 filter systems, and obviously one of them 'drives' this tensioner.
Does anyone know which one?
If someone knows of a detailed schematic of the lubrication system of this engine pls post it here?
I've been unable to find such, and would like to have a look at what must, should or does go on.
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline Amsterdam

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Re: Husky 701 Cam Chain Tensioner
« Reply #14 on: October 22, 2018, 09:27:18 am »
2017 engine

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Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #15 on: October 22, 2018, 10:07:40 am »
Dankie Amsterdam!
I have my doubts about no's 10, 11 & 12 being correct though, they may be hashed.
What's the source of this schematic?

I haven't opened this engine yet so am not too sure about any oil-jets or nozzles present in the head, which, if they are present, will act as chokes hence will cause a higher pressure in the oil gallery feeding it - in which the tensioner sits!
If none are present then the system's pressure will be lower, and it follows that the tensioner then will operate at a lower pressure too.

My hunch is that air enters the oil system when it is switched off warm i.e not running.
Engine warm means thin oil hence faster & free-er flowing, and my bike proves this to happen quite quick.
If no jets are present in the head then this would be the logical place to suspect where air is sucked in - and if true a few simple non-return valves would then solve this problem.

Note that when the tensioner is slack i.e during the chain being noisy there's little chance of the cams being lubricated.
I never rev the engine to speed up "the noise going away", and now that you know the above you may want to do same.
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline Amsterdam

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Re: Husky 701 Cam Chain Tensioner
« Reply #16 on: October 22, 2018, 02:36:22 pm »
What's the source of this schematic?


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Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #17 on: October 23, 2018, 08:05:49 am »
OK, kak me out, I never looked there  :-[ :P
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701
 

Offline Amsterdam

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Re: Husky 701 Cam Chain Tensioner
« Reply #18 on: October 23, 2018, 09:29:30 am »
OK, kak me out, I never looked there  :-[ :P

My first thought was that you must be young and therefore know that you need a manual only as a last resort (i.e. when standing with a bucket of left over bolts in hand) but looking at the list of bikes in your signature it is more likely a case of early Alzheimer's.  And us pensioners never make jokes about that anymore.

Heddles never answered your question about the reason for the timer mechanism failing.  Looking at the schematic and the other descriptions in the manual my best guess is that it is most likely associated with oil contamination.  Anybody know for real what the cause is?
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Offline BuRP

Re: Husky 701 Cam Chain Tensioner
« Reply #19 on: October 23, 2018, 10:52:15 am »
A'dam.

Nope, neither youngster nor forgetful, probably more like underestimating the completeness of this manual - which I actually have.
Your bucket of leftover goodies rings a younger bell though, we always joked we'd make a bicycle out of it.
Young and onnosel still, those were the days!  ;)

Regarding the tensioner's failing, I'd not mind seeing one for my self.
Anyone has one?
I'll pay for the postage to send it to me, or if in Gauteng I'll come collect - please let me know, here or via PM?

Reason is I'd like to see what kind of seal is used, and also inspect the way how it's breathing function works.
Several suspicions but I have to see one first.
On your oil contamination - perhaps, but then only for those who really keep their oil in for 10KKm, a thing I'll not do, not even close.
This is a post-filter gallery, by definition the cleanest environment, and I could think of sludge/water only - but it's 2018 now, those days have gone I think  ;)
Sparta MC50, 46 other 50cc's, Garelli Cross, Jawa 250, Kawasaki S1 250/3, S2 350/3, H1 500/3, H2 750/3, Suzuki GT380/3 - 10 year gap - KDX200, BMW 1150GS Adventure, Honda CBR600RR, Honda XR650R 2007 & 2003, Honda CRF230, Yamaha BWS100, BMW F800GS Adventure, Husqvarna 701