Paging Frank Moore; I've found a slipper clutch for your beast.

[Pat Conlon]

Hey big guy, I recall in the past where you were mentioning your big motor along with the lightened crank was a handful (ball smasher?) on decelleration....
Courtesy of Doc at the UK FJ group:
http://www.fjracer.com/#/new-mods-2009/4532386616

Hope this helps...

paddy

[racerrad8]

I read this a couple of weeks ago when I joined the FJ-uk group. I contacted Sigma who advised they built this for the XJR1300. I spoke with Neil and told him all of the clutches were the same from the beginning of the FJ1100 and he advised it should work without issue. The price is pretty steep at close to $1000.00 plus tax (VAT) & shipping.

I am still in conversation with Neil regarding the ability of the unit to handle horsepower & load. My goal is to try and obtain one for some testing and maybe be able to some sort of group purchase to help deter some of the cost.

Randy - RPM

[thuber3040]

Try here first for the us


http://www.mtceng.com/index.php?option=com_virtuemart&page=shop.browse&category_id=60&Itemid=60

[racerrad8]

Try here first for the us


http://www.mtceng.com/index.php?option=com_virtuemart&page=shop.browse&category_id=60&Itemid=60

I looked through their site a few months back. I was able to find multi-stage clutches for a drag bike, but nothing indicating slipper clutches. But, I will look again.

Randy - RPM

[thuber3040]

Send them a note, I have a few of their items on my other bike, good products.
Good thing I bought my larger priced parts way back when, LOL

[racerman_27410]

AHHHHHHH..... that looks tits.....of course now that i have the DRZ SM i dont really ride the FJ as aggressively in the twisties as i used to.....still..... it would be very trick to have wouldnt it? 

Randy,
I would be more than willing to be a test pig.... brutus is putting solid 115lb /ft to the rear wheel.... either the clutch can handle it or it cant.

Kookaloo!

Frank

[SlowOldGuy]

You know, the first gen R1 used the exact same clutch as the FJ, except is used all large plates.  I wonder if the later model R1 changed it or if it is still compatible?

DavidR.

[racerman_27410]

You know, the first gen R1 used the exact same clutch as the FJ, except is used all large plates.  I wonder if the later model R1 changed it or if it is still compatible?

DavidR.

hmmm.... now ya got the modifier in me thinkin....... i bet ya i can find a wrecked R1 clutch somewhere....or maybe even a slipper clutch for a R1?

http://cgi.ebay.com/ebaymotors/STM-ROAD-SLIPPER-CLUTCH-FITS-YAMAHA-99-03-YZFR1_W0QQcmdZViewItemQQhashZitem2c4ee82a9eQQitemZ190302399134QQptZMotorcyclesQ5fPartsQ5fAccessories


Kookaloo!

[thuber3040]

I guess I'm a little unclear why you want the slipper, if its drag racing then that works, for street I dont understand, I run full barnett kit and springs on my kz and its in the mid 180 hp range, and it doesn't slip if I don't want it to.

[racerman_27410]

I guess I'm a little unclear why you want the slipper, if its drag racing then that works, for street I dont understand, I run full barnett kit and springs on my kz and its in the mid 180 hp range, and it doesn't slip if I don't want it to.

LMAO.... its all good brother.... a slipper clutch doesnt slip on acceleration...... its designed to slip when the backtorque of the engine ( when downshifting) would normally cause the rear tire to break traction and either hop or slide (can you say highside?) ... like if you pulled in the clutch at high RPMs... downshifted two gears and then just dumped the clutch while still at high speed..... a slipper clutch would release at that point and let the engine and drivetrain work independantly until such time as either you got back on the throttle or the engine torque and rear wheel speed match back up as the bike speed decreases..... could also save ones ass should the wrong gear be selected via too many downshifts going into the corner.

the beauty of them is they are adjustable so you can tune them to suit your riding style.... all the way from freewheeling into the corner to locked up completely.

i dont really need one as i have become accustomed to the performance of my engine and just ride it with a gentle hand........ lest i be weighed, measured.... and found wanting.


but still cool nonetheless and definitely fun to mess with 

[thuber3040]

ahhh, well the kz is 99% drag only so its doesnt go on the curves very often, thats why ive come back to fj's the best of all worlds without killing you with one feature over all others

Thanks

[racerman_27410]

 slipper clutches were designed for road racing motorcycles... when the rider needs to bang multiple gearshifts and let out the clutch without the bike doing anything funny in the turn (like spit him off)....

the benefit is having the bike in the right gear (with clutch out) for the drive out of the turn before ever entering the turn.


i rode a ZX10 with a slipper clutch and it definitely is a benefit in the twisties.... it allowed me to ride the bike smoother at higher RPMs.. which is where those bikes make their power.

for my FJ, which has a lightened crank, a slipper clutch could help with the lightening fast deceleration that happens when i close the throttle from high RPM ...which then causes my weight to transfer forward.... resulting in my junk getting smashed up againt the tank lest i have a firm grip with my knees...which i normally do.... the slipper clutch would/could absorb most (all? depending on tuning) of the torque that normally goes straight to the back wheel.... .so a slipper would help in keeping the bike more stable (less weight transfer) on deceleration.

there is no problem with my acceleration   

KOokaloo!

Frank

[Harvy]

You know, the first gen R1 used the exact same clutch as the FJ, except is used all large plates.  I wonder if the later model R1 changed it or if it is still compatible?

DavidR.

hmmm.... now ya got the modifier in me thinkin....... i bet ya i can find a wrecked R1 clutch somewhere....or maybe even a slipper clutch for a R1?

http://cgi.ebay.com/ebaymotors/STM-ROAD-SLIPPER-CLUTCH-FITS-YAMAHA-99-03-YZFR1_W0QQcmdZViewItemQQhashZitem2c4ee82a9eQQitemZ190302399134QQptZMotorcyclesQ5fPartsQ5fAccessories


Kookaloo!

Frank..... thats gotta be a good price for keeping the squirrels happy.   

Harvy

[threejagsteve]

You know, the first gen R1 used the exact same clutch as the FJ, except is used all large plates.  I wonder if the later model R1 changed it or if it is still compatible?

DavidR.

hmmm.... now ya got the modifier in me thinkin....... i bet ya i can find a wrecked R1 clutch somewhere....or maybe even a slipper clutch for a R1?

http://cgi.ebay.com/ebaymotors/STM-ROAD-SLIPPER-CLUTCH-FITS-YAMAHA-99-03-YZFR1_W0QQcmdZViewItemQQhashZitem2c4ee82a9eQQitemZ190302399134QQptZMotorcyclesQ5fPartsQ5fAccessories


Kookaloo!

Hoo-yeah!
Do you think my wife would mind if I sold her car?

[Harvy]

Frank......speaking of saving up for something you want.

The more you look at that slipper clutch the more feasible it sounds....... quote from the listing on eBay....
"STM Yamaha Slipper Clutch ( Sug. retail $1049.95 )
Wet slipper clutch utilizes "FLS" – Forced Lubrication System
Utilizes a 125mm diaphragm spring to handle 1000cc horsepower output
Diaphragm spring provides more pressure under lock up, less drag than helicoil spring and digressive lever engagement
Utilizes OEM basket & clutch plates
Fits Yamaha 99-03 YZFR1"

Utilizes OEM Basket and plates......is not a problem and the '99 R1 pressure plate is the exact same part no as my '91.......should be the same as yours if FJ clutch and XJR unit are the same......just can't find a parts lookup for them at the moment.

Just trying to spend your money for you mate...  me!
Harvy