Rear mono shock skid

[Irv]

Typically the Yamaha are valved too stiff in low speed compression and too soft in high speed compression which gives you a rough ride in the studders and bottoms out easily in big bumps.



AS mentioned in Rex article Yamaha uses a single tapered valve stack only. Most every shock revalvers will put at two stage or three stage valve stack in the shocks which will (properly done) give you a compliant ride in the studders and yet still have much better bottoming resistence than stock. Personally I use two stage stacks in compression and rebound with great results.

If your using stock valving your back is paying the price, no amount of suspension adjustments can make up for a poorly valved shock.

Heres some interesting reading:

http://www.shimrestackor.com/

Thanks Suprfst, great info.

I wrote Frank at Shock Tec this morning so I am waiting to hear back from him.
I noticed this paragraph and it got my attention so hopefully he knows exactly what I am after and has a fix?

"Yamaha Mono shock- we have a new valve stack for the yamaha mono shock RA, there are alot of complaints about bottoming, this set-up will virtually eliminate bottoming while maintaining the excellent cushiony feel."

Like I mentioned earlier, I would like to try and use someone in Ontario or at least Canada as Duty, shipping and tx's kill us up here!

Thanks for the input

 

[welterracer]

when I first got my apex I complain about the riding to soft... bought the slightly bigger spring and had pioneerperformance.net do a revalve and upgrade the seal... I think it rides great and I never complain about it... and that was 7000 miles ago

 

[Irv]

when I first got my apex I complain about the riding to soft... bought the slightly bigger spring and had pioneerperformance.net do a revalve and upgrade the seal... I think it rides great and I never complain about it... and that was 7000 miles ago

Good to hear Weltracer.

You mean you haven't serviced them in 7000 miles or it was 7000 miles since you had them rebuilt?

When do most on here have their shocks refreshened/rebuilt?

 

[TBay Sledhead]

Typically the Yamaha are valved too stiff in low speed compression and too soft in high speed compression which gives you a rough ride in the studders and bottoms out easily in big bumps.



AS mentioned in Rex article Yamaha uses a single tapered valve stack only. Most every shock revalvers will put at two stage or three stage valve stack in the shocks which will (properly done) give you a compliant ride in the studders and yet still have much better bottoming resistence than stock. Personally I use two stage stacks in compression and rebound with great results.

If your using stock valving your back is paying the price, no amount of suspension adjustments can make up for a poorly valved shock.

Heres some interesting reading:

http://www.shimrestackor.com/

Thanks Suprfst, great info.

I wrote Frank at Shock Tec this morning so I am waiting to hear back from him.
I noticed this paragraph and it got my attention so hopefully he knows exactly what I am after and has a fix?

"Yamaha Mono shock- we have a new valve stack for the yamaha mono shock RA, there are alot of complaints about bottoming, this set-up will virtually eliminate bottoming while maintaining the excellent cushiony feel."

Like I mentioned earlier, I would like to try and use someone in Ontario or at least Canada as Duty, shipping and tx's kill us up here!


It's the shipping that gets you because there is no duty and the price to do it in the US is usually cheaper, therefore less tax. But depending where you live, shipping to and from the US will take forever and cost you a fortune. Shipping in Canada cost a small fortune. It's cheaper for me to drive 45 min to the border and ship from there than it is to ship within Canada and have the job done.
Thanks for the input

 

[Irv]

Typically the Yamaha are valved too stiff in low speed compression and too soft in high speed compression which gives you a rough ride in the studders and bottoms out easily in big bumps.



AS mentioned in Rex article Yamaha uses a single tapered valve stack only. Most every shock revalvers will put at two stage or three stage valve stack in the shocks which will (properly done) give you a compliant ride in the studders and yet still have much better bottoming resistence than stock. Personally I use two stage stacks in compression and rebound with great results.

If your using stock valving your back is paying the price, no amount of suspension adjustments can make up for a poorly valved shock.

Heres some interesting reading:

http://www.shimrestackor.com/

Thanks Suprfst, great info.

I wrote Frank at Shock Tec this morning so I am waiting to hear back from him.
I noticed this paragraph and it got my attention so hopefully he knows exactly what I am after and has a fix?

"Yamaha Mono shock- we have a new valve stack for the yamaha mono shock RA, there are alot of complaints about bottoming, this set-up will virtually eliminate bottoming while maintaining the excellent cushiony feel."

Like I mentioned earlier, I would like to try and use someone in Ontario or at least Canada as Duty, shipping and tx's kill us up here!


It's the shipping that gets you because there is no duty and the price to do it in the US is usually cheaper, therefore less tax. But depending where you live, shipping to and from the US will take forever and cost you a fortune. Shipping in Canada cost a small fortune. It's cheaper for me to drive 45 min to the border and ship from there than it is to ship within Canada and have the job done.Thanks for the input

I assume the bolded part is your;s TBay?

Unfortunately, I don't live close enough to a border, (3-4hrs each way east or west) so that is why I am hoping to have it done in Ontario or at least Canada?
I haven't looked up to see where Drayton Ont is yet as that is where Shock-Tec is located, but hopefully it is not too far nor expensive?

 

[welterracer]

I have 12,000 miles on my slide now had that shock rebuild 7000 miles ago...... realistically you should have the oil changed out every 3500 miles.... I have friends who have all their shots results every year

 

[welterracer]

I have 12,000 miles on my sled now ..had that shock rebuild 7000 miles ago...... realistically you should have the oil changed out every 3500 miles.... I have friends who have all their shocks rebuilt every year..

 

[Blue Dave]

Third time may be the charm? LOL, just kidding. You can fix your typo's with the edit button in one "shot" (pun intended).

I get my shocks rebuilt every other year which usually works out to about 2,000 miles for me. Like most other maintenance items the maximum mileage between required servicing will vary depending on the severity of use.