Getting ready to install RPM fork valves

[bugboy]

I'm hoping to install my new RPM valve and springs today. I have never "torn into" a set of motorcycle forks before and am a little hesitant.

From a previous post, Randy had posted "Here is the instructions: Drain the oil, refill with specified oil, install valves, set oil height, install specified springs and (cut "D" rod if you have one) screw the tops on."

So is it really that simple? No spacers to cut? No "sag" to measure?

I'm going to go out and take off the handle bars, get the fork caps off, and drain the oil then I'll come back and check this thread for words of wisdon and/or re-assurance.

Thanks in advance.

Kurt

[elbows]

well get on with it and take some pics so we can all have a look how easy it is to do

then take the bike out and the right a report on how you think its better than the old set up

[Mark Olson]

you will have to cut spacers for the springs to set preload. other than that it is simple.

[bugboy]

Any idea of what spacer lenght to try first.  Stock '87 FJ, no luggage, 160lb. rider.

Kurt

[Mark Olson]

it is one of those things I can't remember off the top of my head.  I think it was 15mm above the fork, check the race tech instructions.

[bugboy]

OK, thanks.  I got my Clymer and Haynes out. Randy's instructions and Race Tech's instructions and trying to meld them all together.

[rktmanfj]

OK, thanks.  I got my Clymer and Haynes out. Randy's instructions and Race Tech's instructions and trying to meld them all together.

Make sure you support the front of the bike before you take the fork caps off...

[bugboy]

From RPM's instructions for RPM Fork Valve Installation -
The RPM fork valve is made exclusively for RPM for the fitment of the 84-93 Yamaha FJ1100 and FJ1200. The valve sits on top of your damping rod and inside the fork spring.

Easy Installation:
1.  If you have the dampening adjustment then you need to adjust it to the center or medium setting.  DONE
2.  Remove the fork springs and drain the fork oil. Remove any other type of old school vavle that might be in the way. Done
3.  Fill with Motul Team Fanctory Line 5wt synthetic oil.
4.  Install RPM Fork Valve
5.  Set oil level (See below).
6.  Install your springs
7.  If you have the dampening "D" rod you need to cut it off 2" from the adjusting head.

Like this???  I hope!!
8.  Reassemble.
9. Ride and enjoy hitting bumps, dips, pot holes, etc.

Installing the fork oil and Setting the Level
1. Fork spring and RPM for Valve removed.
2. Fork fully compressed.
3. Fill forks with recomended oil: 1/2 liter of Motul 5 wt. Team Factory Sythetic oil.
4. Cycle the fork up and down to remove any trapped air.
5. Install the RPM Fork Valve with the tip up (It fits inside of the fork spring) See fig. A.  The damper rod goes in first and then the valve goes on top of that???

Like this?
6. Push RPM Fork Valve down to damping rod (using the spring for this works best, then remove the spring).
7. Measure oil level with -
            a. Shock fully compressed
            b. RPM Fork Valve covered in oil.
            c. The fork springs removed.
8. Add or remove oil as needed; reommended level of the FJ is 6" from the top of the upper fork tube.
9. Install fork spring, washer and spacer if used and install the fork end cap.

Like this? spring, washer, spacer, cap

[bugboy]

Does the above post look like I'm on the right track on this install? I'm kind of waiting on some feedback before I press on.  I don't want to screw anything up or have to do it twice. 

Thanks for you help.

Kurt

[FJmonkey]

My RPM valves arrived today, I am quite eager to see this all go together.

[racerrad8]

Kurt,

Sorry, I have been sleeping...It is hard to work Australian hours in California

You are on the right track.

You need to add the oil prior to dropping in the valves(#3 in the instructions). It is difficult for the oil to get below the valve if not.

Everything else looks correct except I do not see a spacer in the bottom photo. The spacers average between 4-5 inches (I believe working from memory).

The spacer length is determined by the second page of the spring instructions and the measurements you need to take from the spring to the top of the fork(fully extended) and the total length of the cap & washer. Subtract the distance of the cap and that give you the spacer length.

Remember, measure it all twice and only cut once...

Randy - RPM

[bugboy]

Thanks Randy.  I'll get back to work on it.

[racerrad8]

Thanks Randy.  I'll get back to work on it.

Okay, I will be back to the shop Tuesday around 1:00pm PST if you have more questions.

Randy - RPM

[Pat Conlon]

Hey Kurt, got your PM. Looks like Randy is assisting you well.

As a early adopter, if you would, take lot's of pictures and do a narrative on each one, and then you can post them in the files section to help others.

[bugboy]

I was but this shit is fighting me.