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Message started by rijopiatt on 12/29/15 at 10:05:39

Title: cam chain check simplified please
Post by rijopiatt on 12/29/15 at 10:05:39

I'm getting ready to install my new Verslavy chain tensioner and the tech section instructions from V1 are very easy to follow, so I don't anticipate any problems.
However, in that text there is reference ( good photos with the chain removed from the engine) to checking the chain for wear and a statement 'Here's a chain check I'm trying to work out" (dated 02/01/10) with a thread to click on that takes me to more discussions that reference more threads to click on and it goes on, and on, and on. I think a European member was measuring distances between several links with the chain in place, then doing some simply math to get a measurement. The V1 post (at the 2010 post) says remove the clutch and primary gear, etc. But when I follow other threads, others say don't remove these (unless you have a known specific problem?) as you will create a nightmare for yourself.
There is so much written on the subject, spanning so many years, that I find it overwhelming. As I've never worked on a motorcycle before, perhaps I would be getting in over my ability. I hate to take it to a dealer. If this info has been distilled down somewhere that I've overlooked on the forum, please direct me there.

Title: Re: cam chain check simplified please
Post by verslagen1 on 12/29/15 at 11:20:36

1st... don't panic (which one's the friendly font again?)
2nd... thing's in there require putting back with a torque wrench.
if you don't have one... don't do it.
if you feel it's beyond you... don't do it. (it really isn't, but some day you'll get there)

Having said this, you need a good measuring stick to make this check. granny's yard stick won't do.
HF has a digital caliper on sale with a coupon for $10, go get it.
The required measurement is over 21 pins or 20 links, 127mm or 5" is brand new from the center to center.
That's kinda hard to do, with the digital caliper, you can set zero over 1 pin and then just measure over the outside of the 21 pins and get the center to center distance.
If you measure anything over 5" on 21 pins that's the stretch you have, you're allowed .075"

Now, without removing the chain you can't measure over 21 pins. And I think without removing the gear you can't measure over 11 pins for half the distance. so measure the number of pins you can measure, divide that number by 20, then multiply by 5 for the "new" length. repeat for .075 for the allowance.

Title: Re: cam chain check simplified please
Post by rijopiatt on 12/29/15 at 13:24:53

I'll set up an equation using known results for a new chain.

20 links/21 pins on a new chain= 5.0"

5.0" divided by 20 links= .25 " for each link

If I could only measure 9 pins/ 8 links that would= 2.0"

2.0 divided by 20= .10

.10 multiplied by 5= .5" ( not 5.0")

Is there a typo in your text or am I not understanding?

Title: Re: cam chain check simplified please
Post by verslagen1 on 12/29/15 at 13:51:18

3D2625203F262E3B3B4F0 wrote:

You're understanding the principle, but I wasn't clear enough for you.

Quote:

so measure the number of pins you can measure, divide that number by 20, then multiply by 5 for the "new" length. repeat for .075 for the allowance.

(8links/20links)*5newlength=2.0"=expected measurement
(8/20)*.075=.030" max. allowance

Title: Re: cam chain check simplified please
Post by rijopiatt on 12/29/15 at 18:08:31

Got it. If I were at 2.030", using the example, it's time to replace the chain. Thanks for your patience.

Title: Re: cam chain check simplified please
Post by justin_o_guy2 on 12/29/15 at 21:26:51

What's the mileage?

Title: Re: cam chain check simplified please
Post by rijopiatt on 12/30/15 at 06:53:07

12,000 miles.

Title: Re: cam chain check simplified please
Post by justin_o_guy2 on 12/30/15 at 09:59:33

Is there some indication that there is a problem? That's a few thousand below the typical time when it really needs to be done.
Unless you have a real reason, noises, etc, then id ride and read and really get this process worked through mentally, before I grabbed a wrench.
An organized disassembly makes a job easier.
Know where you are going to put things before you have them in hand.
A profile of the engine on cardboard with a slot stabbed in it where each bolt goes.
Some people have needed attention to the chain tensioner at around 12, not sure we fully understand exactly what causes some to need attention sooner than others, but there is plenty of speculation, and, IF we say that the chains themselves are created equal, which I have my doubts about, then we get to how long, on average, the engine was run when it was started. And RPM, and what oil,
But I don't think it's time for a chain.

Seems like on the early bikes the chain lasted longer.
What year model is it?

But, Do get the Versy and the gasket. You Will be in there one day.

Title: Re: cam chain check simplified please
Post by Tocsik on 12/30/15 at 12:15:21

I was just recently at 19mm with 10K on the bike. Bought it with less than 3K so I know for a fact all but those first 3K miles were run with Rotella oil and zinc booster.
Indication was chain noise getting progressively louder and I thought it best to check it when I dropped the oil for the 10K service.
'Slavy installed, noise gone.

Some need intervention sooner than others. Many have speculated that premature chain stretch could be due to shorter rides. I don't ride short 5-10 mile runs but the bike is my commuter vehicle so it does only run about 24 miles one way.

Title: Re: cam chain check simplified please
Post by rijopiatt on 12/30/15 at 18:18:31

To All- No problem that I'm aware of. I'm simply taking advantage of having the chain exposed while installing the "Versy" to educate myself more about the engine, as I've never worked on one before. I figure I'll have a benchmark for future reference when checking the advancement of chain wear.
Between Clymer, The Motorcycle Companion, Tech Section and all the knowledgeable forum members, I hope to avoid having to rely on a dealership for mechanical work as much as possible. I do have mechanical ability and I'm detail oriented, as I've built an ultralight aircraft from scratch, requiring the design and fabrication of components. However, my experience with engines is very limited. I think that incrementally I will be able to go deeper, literally, into the engine when required with the resources mentioned.

Title: Re: cam chain check simplified please
Post by justin_o_guy2 on 12/30/15 at 18:20:27

Tocsik, what year model was that?

Aside from the idea that the length of trip/time engine stays at operating temperatures, rather than just getting warmed up, shutting off, rinse, repeat,,
I'm wondering if the chains are just not as good as they were a few years ago.

I'm gonna have to start a thread...

19 mm at 10,000 miles is just hard to imagine. Wow...