Rpm valves

[magge52]

Would using a heavier weight oil give similar results to adding more 5 wt oil? BTW, the fork tool is 'not currently available' at RPM.

[Bones]

I'd stick with the 5wt oil, the valves were designed to work with that weight and adding thicker will probably give you a harsher ride because it wont flow through the shim stack as easy as the thin oil.

[Arnie]

Would using a heavier weight oil give similar results to adding more 5 wt oil?

No, they do different things.  A heavier wt oil will flow more slowly through any orifice or control mechanism (fork valve).  Putting more oil in will make the spring rate increase more rapid as you approach full travel.

BTW, the fork tool is 'not currently available' at RPM.

So, make your own.  A 3/4" nut has an outer measurement of 27mm (which is what you need).  Weld that nut to a socket or to a piece of rod and that will work to hold the damper rod in place while you remove that 10mm head allen bolt from the bottom of the fork.

[movenon]

Would using a heavier weight oil give similar results to adding more 5 wt oil?

No, they do different things.  A heavier wt oil will flow more slowly through any orifice or control mechanism (fork valve).  Putting more oil in will make the spring rate increase more rapid as you approach full travel.

BTW, the fork tool is 'not currently available' at RPM.

So, make your own.  A 3/4" nut has an outer measurement of 27mm (which is what you need).  Weld that nut to a socket or to a piece of rod and that will work to hold the damper rod in place while you remove that 10mm head allen bolt from the bottom of the fork.

Like this. Or similar.  I think it is an 18mm bolt. Head size 27mm

George

[racerrad8]

All of the fork tools are in stock, the link posted was from a cart.

Yamaha Damper Rod Holder

I will respond in depth later this week about all of the recent posts.

Trev, fork valves are pretty simple to install, give the directions a few reads before starting and let me know if you have any questions.

5wt oil only and only Motul 5 wt. I covered this in depth in the original posts on the valves.

The air gap was also part of the testing of the valves and the depth listed in the directions is pretty important as it does change the way the valves work.

I will try and get the detailed reply by Wednesday.

Randy - RPM

[Steve_in_Florida]

I'll chime in as a happy RPM Fork Valve/Race-Tech Spring user!

Just rebuilt my first set of FJ forks last week, and performed the checkout ride last night.

Wow!

Followed Randy's instructions and recommendations, and could not be happier.

Thank you (again), RPM!   

Steve