Who will be changing there chain tensioner to the 14' during valve adjustment ?

[~TABASCO~]

The 2014 has a new part number 2BS-12210-00-00 for the cam chain tensioner. The old one for the 12-13 is 23P-12210-00-00. Ive read and been told its un upgrade similar to the 2014 clutch basket. Im guessing this new tensioner will keep more pressure on the chain during start up, and lesson the chain slap noise during worm up......

Who out there has or will be changing out to the 2014 unit when performing there own valve adjustment or having a shop do the work? Im 99.9% sure I will be installing the new 14 unit when I adjust my valves, just wanted to get some first hand info from some folks that have installed it on there 12 or 13 and get some real world feed back.

If your going to have one installed lets here from you, and if you own a 12 or 13 and have already installed the 14 unit we want to hear from you.... Thanks

 

[Doug C]

Parts on order already. Plan to upgrade when the time comes.

 

[cosmic]

I will do it too. 3000mls to go.

 

[autoteach]

i am not going to check my valves, but the parts are here already. The chain made one hell of a racket about a week ago and I decided that was a good warning to just do the work. will happen with some free time.

 

[carrot]

i will change it if i here that it removes the chatter. i find it to be not so bad compared to the R6 i use to have when i did the valve adjustment on the R6 I found the timing chain had stretched as i couldn't get the timing marks to line up exactly .

 

[avc8130]

I was planning on it when I got to the 52k check. I'm knocking on 40k now, so that check probably won't be until winter 2015. Yamaha has been known to blow through cam chain tensioner revisions so I will wait until I do the adjustment to order the most updated part.

My current setup makes a lot of noise at startup, and gets pretty grumpy during hard down shifts hitting the twisties.

ac

 

[scott123007]

... and gets pretty grumpy during hard down shifts hitting the twisties.

ac

Why is that do you suppose?

 

[OldRider]

Why wait until a valve adjustment to swap them out?

 

[Don in Lodi]

Why wait until a valve adjustment to swap them out?

Mainly because you need the valve cover off so you can reach down inside with a screw driver to give the tensioner a tap to unlock it from it's collapsed mode. A kill two birds with one stone sort of thing.
And I'll have an updated version in hand when I take mine in for the check.

 

[avc8130]

Mainly because you need the valve cover off so you can reach down inside with a screw driver to give the tensioner a tap to unlock it from it's collapsed mode. A kill two birds with one stone sort of thing.
And I'll have an updated version in hand when I take mine in for the check.

That step has to be done with the CLUTCH cover off actually.

ac

 

[avc8130]

Why is that do you suppose?

Because the cam chain is vibrating like crazy on decel as the force/tension becomes reversed on decel.

Cam chains are quite a violent thing:

https://www.youtube.com/watch?v=veQxzlSxgB0

ac

 

[Don in Lodi]

That step has to be done with the CLUTCH cover off actually.

ac

Really? I had a completely different picture in my head of where said parts are. Wow, from the bottom up, wonder why they would do it that way... More labor for the shop?

 

[OldRider]

That step has to be done with the CLUTCH cover off actually.

ac

Sort of a different way to build a simple chain tensioner.

 

[oKLRider]

::017::

 

[Ramseybella]

So I am wondering how the 100k+ mile guys feel about changing to a new 2014 Timing chain Tensioner?
I am still waiting on my Clutch basket from RM ATV.

 

[scott123007]

Because the cam chain is vibrating like crazy on decel as the force/tension becomes reversed on decel.

Cam chains are quite a violent thing:

https://www.youtube.com/watch?v=veQxzlSxgB0

ac

Cylinder firing pulses and valve opening and closing definitely cause cam chain vibrations at different RPM's, and there was definitely some un-harmonious shit going on in that video, but unlike a drive chain, where the rear wheel becomes the driving force against a slowing engine on de-acceleration, a cam chain's force/tension is NEVER reversed on de-acceleration. It is not possible. The crankshaft is always pulling the cam the same way regardless of whether the engine is under power or not. For the tension to be reversed, the cams would now have to be driving the crank, and that just aint gunna happen.

 

[~TABASCO~]

Cylinder firing pulses and valve opening and closing definitely cause cam chain vibrations at different RPM's, and there was definitely some un-harmonious shit going on in that video, but unlike a drive chain, where the rear wheel becomes the driving force against a slowing engine on de-acceleration, a cam chain's force/tension is NEVER reversed on de-acceleration. It is not possible. The crankshaft is always pulling the cam the same way regardless of whether the engine is under power or not. For the tension to be reversed, the cams would now have to be driving the crank, and that just aint gunna happen.

agreed... fact

 

[avc8130]

I agree also. I was not able to portray exactly what I meant well. Either way, pull a monster downshift and let the wheel drive the rpms up high and you get a much different clatter than if you bring the rpms high under engine load.

 

[avc8130]

if you guys truly believe the slack in the chain is constant based on rpm solely and not also based on whether the motor is under load or not, you both must work for Yamaha because you'd be making noisy cam drive systems like it's your job.

The dynamics of cam drive are so complex that it is a little known secret that most companies actually subcontract out the design of their can drives. Borg Warner is a company that particularly specializes in this field and does subcontracted work for most of the big auto makers in cam drive areas.

 

[twinrider]

Yamaha should go to gear-driven cams.