Front Forks and spin on oil filter

[Tengu]

Folks,

I recently installed the Penske shock on my '90 FJand love it! She doesnt sag when I roll on the throttle at all, very nice feeling!
Soon I will adjust the seat height as well. But before I do I wanted to make sure the front forks were up to scratch as well.
Having seen Randy RPM's new fork springs I was hoping for some advice on which spring would be best - the 0.85, 0.9 or 1.0 kg/mm
The fellow who installed the Penske recommended the 1.0 straight away. Thoughts?
I am around 80kg and my girl is around the same (she is often on the bike with me)
What weight oil should I use as well? Ive never taken the forks off or done any work on them so I was wondering how much work is actually involved and is there anything else I need to do to them at the same time (like seals)(and yes I will be getting some more knowledgable hands on assistance for this)
Is there another thread that covers this? (I couldnt find it)

I am awaiting RPM Randy to get together a larger oil cooler as well, but its time for an oil change as well so I thought I would get the spin on oil filter mod kit.
I have read a couple of threads here saying its a good idea, so my main question is how hard is it to get the spin on filters here in Australia (tho I plan on getting Randy to send me a couple extra of them.

thanks folks

[Mike 86 in San Dimas]

In File section, modifications, is thread about spin on oil filters that may help.

http://www.fjowners.com/index.php?topic=677.0

It show which filters fit. I assume you can find them in your auto parts stores. Check it out.
Mike

[racerman_27410]

1.0kg springs are right in the range for FJs

if you carry a passenger or loaded up with luggage regularly then you may want to think about 1.05kg or 1.10kg springs.

i run the 1.10kg springs since i weigh about 215lbs, often carry about 90lbs of luggage and have a slight tendancy to ride agressively in the twisties.


you want to run the lightest weight oil that will give you the rebound damping required to keep the springs from pogo=ing.

this may take some experimenting but i would start with 5wt fork oil


KOokaloo!


Frank

[racerrad8]

I changed my adapter to be more international friendly, so the list on that file link won't interchange. My adapters use metric threads which are 20x1.5mm which is a common application. I include a list of filters on the installation instructions.

Randy - RPM

[Pominoz]

Tengu,
take the info supplied with the adaptor kit into any auto parts shop. There's plenty of choice of filters available in Oz.

Martin,

[oldktmdude]

  Tengu, I use  Ryco Z148a (or cheaper brand) . These are readily available in Oz and fairly cheap. Some brands are already black so painting is not required.              .                                                                                                                                                                                                              Regards, Pete.

[fj11.5]

hey oldktm i use a ryko z144  short filter, is the one you buy long or short , , oh and  paint is an improvement 

[oldktmdude]

  G'day fj11.5, the Z148A is just over 100mm long and about 80mm dia, so it's fairly compact. If you buy the Cooper branded filter they are already black. These may not be as easy to find as the Ryco filters.     Regards, Pete.

[rktmanfj]

and have a slight tendancy to ride agressively in the twisties.

Yeah, very slight...       

[hein]

Morning Tengu.
    I weigh about 90kg. and I'm using the 1.0kg/mm springs. My riding is split about 70% solo and 30% two up and usually with a bunch off stuff in the Givi bags. If you ride a lot of two up perhaps a slightly higher spring rate is required.
    I don't know if you'r planning on using the Race Tech emulators but I'd highly recomend them. With these units you can control the rebound from the compression damping seperately. The emulators will control the compression and the oil viscosity will determine the rebound. My current setup with the emulators uses 10wt and I'm happy with the compliance and front end feel

Hein.

[Tengu]

Thanks for all the info folks, it's really appreciated

Where should I be looking for info re the emulators? (IE where do I get them and how much)
Is it a lot of work to install them?

I think I will go the spin on filter...
just waiting on Randy to tell me the oil cooler is a go

[Harvy]

Randy was having emulators made too. Not sure how far he is down that path.

Racetech:
http://racetech.com/ProductSearch/2/Yamaha/FJ1200/1990-93
or
http://racetech.com/ProductSearch/2/Yamaha/FJ1200/1986-89
or
http://racetech.com/ProductSearch/2/Yamaha/FJ1100/1984-85

Harvy

[racerrad8]

Since, we are talking about the next two new RPM products, I might as well give an update including the third new item.

Once I was able to get the fork valves back, the testing is back on track. I now have two sets out being tested and one more set to install in the next couple of weeks.

I am scheduled to have the new rear shock in time to install on the bike that is going to get the third set of fork valves. The final installation will give the final test and at the minimum the fork valves will be ready to go and if the rear shock works great then it will head into production as well after testing on both year applications.

To date, the valves have been great, but since the stock springs were so light the valve was being allow to lift from the seat allowing oil to bypass. The new springs are being used in all testing applications.

The benefits to this fork valve is the actual shim pack valving designed just like the USD fork application but in a drop in cartridge and no major modifications. There will not be any drilling of the internal parts of the forks to ensure proper application. The only modification is the elimination of the "D" rod after setting the "factory" valving.

So, far the spring application is lighter than those used on the other brand of emulator as these are a shim pack and not utilizing the spring to control compression.

I have purchased 20 coolers and have them in hand, the mounting brackets are being manufactured and the final pieces of the puzzle are the hoses & fitting are on the list of items to get headed my way this week.

One monkey wrench that popped up a couple of weeks ago was the newer FJ and the motor mount system used. I have to determine if I can modify the hoses to fit all applications or if a different hose set will be required. Fortunately, I have two 93's at my shop to play with them this week.

I am hoping to have the fork valves and oil cooler kits ready and on-line late February/early March. I am really disappointed I have not been able to have the fork valves out and ready to go yet, but as well documented here, situations out of my control has delayed the testing and progress of getting them ready for use.

Thank you for your support,

Randy - RPM

[1tinindian]

I'm in line for the fork valves and springs you are working on Randy!
Thanks.

[nvmike24]

I am in on 2 coolers for the 84 & 90 and 1 shock for the 84