Slipper clutch

[cr500binks]

i want a slipper clutch for my 96 cr500 engine. I ride my bike on mx, enduro and on the road and i need some advice on which one to get, can anyone who's got one give me good advice or point me in the right direction

[TYSTYX]

Ive never tried a slipper on a dirtbike.......but I love the slipper on my CBR1000. It really keeps the ass end from locking up when I'm a little hot coming into a corner and have to drop an extra gear to "engine brake" a little......or alot

That being said, Ive never seen a slipper clutch for a dirtbike. There is the Rekluse clutch, but it is not a slipper like the one on my crotch rocket....its the complete opposite.....maybe its what your looking for......it works by slipping the clutch to keep the bike from stalling when RPM's are low. It also allows you to shift up or down without using the clutch lever. Here's their website.
www.rekluse.com






.

[Roostius_Maximus]

there was a slipper for sale on ebay a few weeks ago, needed a big plexi clutch cover too

[cr500binks]

basically all the tracks near where i live are quite small and tight and im forever using the clutch lever so i thought a slipper is what i need ! my mate has got a ktm supermoto i think its a 690 and its got a slipper clutch as standard and he can drop it from 5th to 3rd in a corner and the thing dont even so much as twitch ! thats what i want !

[B440]

Can a slipper allow the motor to idle when coasting down a hill? Like a bicycle does?

[NightBiker07]

basically all the tracks near where i live are quite small and tight and im forever using the clutch lever so i thought a slipper is what i need ! my mate has got a ktm supermoto i think its a 690 and its got a slipper clutch as standard and he can drop it from 5th to 3rd in a corner and the thing dont even so much as twitch ! thats what i want !

I think you're talking about a Rekluse clutch.

[2strokeforever]

http://www.rockymountainatvmc.com/p/43/ ... UTCH+CABLE

[oldie 30]

I fitted a STM to mine, I don't see the relivance for your application, maybe if you were riding alot of track or supermoto. You would not get any improvement on dirt as theres not much back pressure.
There are other makes out there. they tell me STM are the best?. A Slipper for a 02-08 crf450 goes in STM, I'm not sure about other makes, there expensive.
[img]http://i1117.photobucket.com/album ... .jpg[/img]

[NightBiker07]

I would like a Rekluse for mine for the stall protection. I am so used to my 250, which is practically impossible to stall, that I am always stalling this thing on hills and in the tight stuff.

[2strokeforever]

I am so used to my 250, which is practically impossible to stall

then get the digital 250 ignition, yes you want the light flywheel too

[oldie 30]

Good vid. Thats heaps better, I would be riding the clutch thought that. Thats snow your riding though

[NightBiker07]

my problem is when I am lugging up a hill and hit a bump at low-rpm and it yanks the motor to even lower RPM, the 500 stalls where my 250 recovers. Ive had instances where the 250 seemed to completely shot off, and recover. Does the 250 ignition respond like that as well?

[2strokeforever]

watch closely at 1:33.... it stalls then starts back up.... it dosent do it every time but it does it fairly often (the oe500 stuff has never done that)

i had the same issues with the 500 stuff stalling when it really shouldnt, mostly hitting small logs in 2nd or 3rd lower rpms, as the tire hit it would stall, sending me over the bars or how it would just cut out at low rpm like a four stroke, with the 250 stuff it wont do that

it will still stall if you force it to but its better than a rekluse (you get to keep your balls)

id say with the 1999 250 ignition if youre on the throttle it will be harder to stall than any 250, but if your not giving it gas it will stall slightly easier



notice how im NOT slipping it on the corners, just pull it in then dump it on the way out, try that with your 500 stuff

[oldie 30]

I have a couple of 250 igintions, but haven't got to try them. Its obvious from the start because of the lighter flywheel stalling is harder, that in its self in single track would be of benefit, it must rev faster aswell

[2strokeforever]

the lighter flywheel makes it easier to stall, on the 500cdi its pretty much unrideable
the lighter flywheel does make the bike feel 10lbs lighter, also a light flywheel gives you a more direct/positive connection with the ground..... more traction if you want it but at the same time it will break loose easier and start spinning like mad if you want it to, and if if starts spinning it stops way faster just by letting off the throttle..... basically it gives you more control

another thing to consider at very low rpms the flywheel weight affects the ignition timing, im not sure how much but i think its pretty noticable
your cdi takes the average rpm and fires X degrees before TDC.....
what it dosent consider is that your crank is going real slow at the end of the compression stroke and pretty quick at the end of the power stroke
so if you add a bunch of weight it will retard the timing, and if you lighten it the timing will be advanced..... the degree #s will be the same but the time it takes after the ignition fires to get to tdc will be different

the 1999 250 ignition makes any rider faster in the trails

[rantala616]

Let's talk about the slipper clutch. Anyone used a STM slipper from CRF 450? Which year I should use? Was it hard to fit?

The only information I have is this, said by one dude:
"02-08 crf clutches work but you will want to machine down the outer diameter of the basket if you want to be able to pull it out from the access cover. I believe you have to swap the cr500 gears onto the outer basket."

Can someone confirm this? The clutches are quite expensive

[rantala616]

I bought Honda CRF 450 02-06 slipper clutch (STM clutch FHN-M030) for my supermoto.

It needs the same amount of plates as 1990 forward CR500. So it needs also 1990 right clutch cover. I use 1989 clutch lifter rod with two bearing balls because that was long enough. Almost too long tough. 1990 clutch lifter rod and bearing are coming in mail. Might be better. Also CRF450 lifter rod coming.

I tried to fit the clutch in stock clutch basket with playing some washers and got it in. The clutch axle for CR500 is little bit too short so the nut isn't easy to get on thread. However when you tighten it gets deeper in the thread because the clutch nut tightens STM primary spring.

I tried with 30kg secondary spring first and it was ok but my clutch got stuck in engaged mode for some reason and slipped all the time. Then I put 40 kg secondary spring (stock) and it didn't get stuck anymore but didn't slip enough either on engine braking... Also now it still slips when hitting powerband sometimes.

Next I'm going to try with a right height clutch basket. Mitaka billet CRF450 clutch basket. It may need machining to get it fit through clutch inspection cover but it can hold right amount of plates without stupid tricks. Gears also needs to be installed from CR500 basket.

Also I ordered 150kg primary spring to reduce slipping on powerband. Might help with the clutch getting stuck also. Stock primary spring is 130kg.

I'll report back how it works out.

[rantala616]

Finally got STM slipper clutch really working in my supermoto. For CR 500 89-01 you need:
- STM clutch FHN-M030
- 150 kg primary spring
- 30 kg secondary spring
- 1 mm thick washer placed under clutch basket bearing rest
- Mitaka CRF450 03-08 clutch basket
- Small sprocket from CRF 450 02-08 OEM clutch basket
- Big sprocket from CR 500 89- clutch basket
- 1mm thick washer between hub and basket
- CRF 450 02-08 clutch lifter rod and bearing etc (CR 500 90- might not need this)
- CR 500 90- right case cover

Have fun!