Motorcycle Racing Forum

Racing Discussion => Rules and Regs => Topic started by: cornercamping on January 31, 2005, 04:57:51 PM

Title: Slipper Clutch Question..
Post by: cornercamping on January 31, 2005, 04:57:51 PM
If you are racing SS, and your bike has a slipper clutch as original equipment, when you replace the clutch, does it have to be OE components?  Meaning, if my bike has a slipper, and I replace it, can I use an STM when replacing it, or do I have to use the OE stuff?

 ???
Title: Re: Slipper Clutch Question..
Post by: xseal on February 02, 2005, 12:26:25 PM
they should allow slippers on SS bikes, period.

Don't know the answer for sure, but my instinct is it needs to be the stock one.
Title: Re: Slipper Clutch Question..
Post by: motomadness on February 05, 2005, 02:30:25 PM
I asked Kevin Elliot the very same question.  From his answer I understood that slipper clutches are legal whether they are OE or not.
Title: Re: Slipper Clutch Question..
Post by: cornercamping on February 06, 2005, 07:07:44 AM
Sweet  8)  Now I gotta get an STM in there  :D  I like the STM's for some reason.  Seem to work better.  I had a "Motowheel's" slipper from www.motowheels.com and it worked alright, but the STM worked better and was worth the extra $.   Yoyodyne also has their own slipper, and a friend has it on his 998, but I never rode the bike so I don't know how it acts.

 :)
Title: Re: Slipper Clutch Question..
Post by: Thumper881 on February 06, 2005, 12:30:12 PM
I have a Yoyo in my 1000 ss. I've used both and I can't tell the diff. I like the start's better with the Yoyo. It's less $ too. But i have nothing good to say about Fred. >:(
Title: Re: Slipper Clutch Question..
Post by: WebCrush on February 06, 2005, 08:42:48 PM
QuoteI have a Yoyo in my 1000 ss. I've used both and I can't tell the diff. I like the start's better with the Yoyo. It's less $ too. But i have nothing good to say about Fred. >:(

I have yet to put a slipper in my 1k yet, but when I do it will likely be a Yoyodyne.

Sorry you had a bad experience, I've had nothing but top notch service from him and recommend him to all my friends.
Title: Re: Slipper Clutch Question..
Post by: cornercamping on February 09, 2005, 09:58:52 AM
I don't know if the Motowheels and Yoyodyne slippers are the same manufactuerer with a different logo, but, the Motowheels seemed to engage differently as opposed to the STM I had.  I think, but I"m not sure, that the Motowheels and Yoyo slippers are the same company, just different branding.  I had the same plates in the STM and the Motowheels.  The Motowheels slipper was definetly great for the money.  :)
Title: Re: Slipper Clutch Question..
Post by: Bill_Ritger on March 11, 2005, 04:21:05 AM
Question.. If a bike has a slipper clutch can it be bump (push) started if it stalls?
Title: Re: Slipper Clutch Question..
Post by: Woofentino Pugrossi on March 11, 2005, 09:15:39 AM
QuoteQuestion.. If a bike has a slipper clutch can it be bump (push) started if it stalls?

My guess is yes. Seen a street ZX10R pop started last year.
Title: Re: Slipper Clutch Question..
Post by: Eric Kelcher on March 11, 2005, 09:36:56 AM
QuoteQuestion.. If a bike has a slipper clutch can it be bump (push) started if it stalls?


I would say without question as the MotoGP bikes all have slipper clutches and all of them use some form of roller to start.
Title: Re: Slipper Clutch Question..
Post by: EX#996 on March 11, 2005, 09:41:53 AM
The 'busa had a slipper clutch, I thought it was used to protect the engine in case you downshifted too early and generated too many revs.

I agree with Eric about MotoGP.

The one thing that you can't bump start is those dang SV's, its rollers or a starter or the rear just locks up.   :-/

Dawn  
Title: Re: Slipper Clutch Question..
Post by: Woofentino Pugrossi on March 11, 2005, 08:26:42 PM
QuoteThe one thing that you can't bump start is those dang SV's, its rollers or a starter or the rear just locks up.   :-/

Dawn  

Twins can be more of a PITA to bump start.
Title: Re: Slipper Clutch Question..
Post by: WebCrush on March 17, 2005, 04:43:07 AM
Well, I got to use my Yoyodyne slipper last week at Daytona, and this thing was GREAT.  Only downside was that it was sooo smooth I would sometimes forget which gear I was in and start to wonder if I missed downshifts.

As for bumpstarting, yes, you absolutely can.  My battery died on the grid (long story) but I was able to bump start mine within 3 running steps (I was shocked how easy it was, my 600 isn't that easy)
Title: Re: Slipper Clutch Question..
Post by: Jeff on April 27, 2005, 06:49:27 AM
QuoteI asked Kevin Elliot the very same question.  From his answer I understood that slipper clutches are legal whether they are OE or not.

whew... I was a little freaked out when questioned about it on the main forum.  My intrepretation was that they were legal, but again, it could be open to intrepretation.

The only SS class I run is heavyweight (on my 600), and I only chose it becasue of where it fell on the schedule for Road A.  I want to run the same classes all year, so if it isn't legal, I need to switch to HWSB now vice sometime later in the season.