In preparation for my Scotland trip, I recently fitted an Oberon clutch slave cylinder to my FJ.
I'd been having to bleed air from the system every 1000 miles or so and the paint had started to peel off the oil filter cover again, so rather than just cleaning up the piston and bore and replacing the seals, I decided to splash out the £117 ($140) for the upgraded Oberon unit and I must say, i am heartily impressed.
It looked like a great quality unit, has given a slightly lighter feel at the lever and gearchanges, especially down the box, actually seem noticeably smoother.
All in all, it seems to have been a worthwhile upgrade.
Dean,
That looks really good. Although I note that they say it is not serviceable - must be returned to the UK if it needs work. I had planned to buy a new slave from RPM the next time I need to redo my clutch. Or even better, before the next time.
Dean, don't throw away your old clutch slave.
https://fjowners.com/index.php?topic=12294.0
Quote from: Pat Conlon on August 30, 2025, 10:49:22 PMDean, don't throw away your old clutch slave.
https://fjowners.com/index.php?topic=12294.0
I won't Pat. I'm going to rebuild it anyway (as I have the kits and parts) and will likely donate it to another FJ owner at sone point, as I already have 2 spare rebuilt OE units on the shelf in the garage, from my previous spares donor bikes :sarcastic:
I too have recently fitted the Oberon Clutch Slave... I could not be happier with the unit. In all my years of owning an FJ (from 1987 on) bleeding the clutch has always been such a pain in the ass. As you all know, there are whole threads dedicated to the tricks and methods use to try to purge all the air from the stock system.
I believe the seal design and bleed screw placement on the Oberon unit are superior to stock.
I was able to bleed the Oberon in minutes using regular methods and it has provided me with better lever feel and engagement than I have experienced in a long time with the stock set up. My bike shifts better and I can find neutral more easily.
My conclusion is that I was not truly getting all the air out of the system so - not full lever engagement - despite thinking that the system was fully bled because no more air bubbles were appearing.
Highly recommend the Oberon
Are the materials better? My stock slave cylinder has to be taken apart every couple of years and cleaned out.
I've just bought one.
Quote from: Waiex191 on August 31, 2025, 04:32:07 PMAre the materials better? My stock slave cylinder has to be taken apart every couple of years and cleaned out.
You can read about them here: https://iwt-customparts.com/en/product/clutch-slave-cylinder-black/
I fit a red one on my '89 a few years ago and have had no issues. Actually he used my bike to promote his product on his website.
My clutch slave had a fair amount of corrosion when I put a rebuild kit in this spring. Now I have drips of brake fluid under my bike. I looked at the oberon slave . Since the oberon isn't rebuildable by the user I've decided to go with the oem unit while they are still available. I'm betting rebuild kits will be around for a long tume.
My last OEM slave unit lasted 20+ years, not a bad value.
My original slave cylinder seemed crappy when the bike was new. I found I had to disassemble and clean it up every couple of years. I'm hoping the Oberon is an improvement. If it lasts 20+ years I'll call it a win.
My original had lasted over 100,000 miles and 36 years, but I'm happy with the Oberon one for now. Better "feel", lighter pull.
I also put an Oberon on my 84 FJ. Haven't had much opportunity to give it a try tho.