Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > Slipper clutch

[the old man]

I ran Sigma slipper clutch in 2006 and can recommend it - I will be running a Sigma clutck in my Thunderbike next year.

Mine was a 5 speed 620SS. The standard clutch has a tendency to grab when coming off the line and I know others have had problems with clutch slip (mine was OK with an extra steel plate in the pack).

The Sigma slipper clutch cured all those problems; it gave smooth take up coming off the line; never slipped (once we'd got the correct spring combinations sorted) and made the bike much more stable on the brakes into the turns - I was a sceptic but ended a convert!

[the old man]

The clutck is a new Sigma development (was a secret till I just blabbed it now!!).

It is based on the standard Sigma device but incorporates some of the ideas Neil Spalding picked up in the MotoGP padocks - specifically it incorporated a set of sun and planet gears, causing the heavier clutch drum to rotate "backwards" emulating the Yamaha MotoGP engine (with its backward rotating crank) and - in theory at least - reducing engine gyroscopic effect.

Having the engine gyroscopic effects opposite to those of the wheels (both rotating forward - usually) reduces the overall gyroscopic effect fely by the chasis and makes the bike more nimble, improves traction and reduces the tendency to wheelie under power.

[MLC Racing]

Slipper clutches eek! My old DLS bike with 58bhp, high bars, and std clutch came 2nd in 2005. Boggy's bike won 2005 without one. Is this not a case of over egging the pudding!!!!

[Rattler]

Originally Posted by MLC Racing

Slipper clutches eek! My old DLS bike with 58bhp, high bars, and std clutch came 2nd in 2005. Boggy's bike won 2005 without one. Is this not a case of over egging the pudding!!!!

Maybe, but could that bike come second next year???? Progress my boy, progress.....

[fil2]

Originally Posted by Rattler

Maybe, but could that bike come second next year???? Progress my boy, progress.....

the 05 bike lol...be lucky if it makes top 5 .......

no slipper clutch...no 6 speed box......and these are the " 07 " must haves for any DD'er serious in 07..aint they.?

[Chris Wood]

As long as the pudding has fruit...is served warm...and is called a struedel. I'm in!!!

My 2007 bike has one...std I think?? I'll ask Boggy and Baines...

I just ride it and hang on!

[Chaz]

Originally Posted by MLC Racing

Slipper clutches eek! My old DLS bike with 58bhp, high bars, and std clutch came 2nd in 2005. Boggy's bike won 2005 without one. Is this not a case of over egging the pudding!!!!

Whitch was the DLS bike you had last year who has it now?

[fil2]

Originally Posted by chass

Whitch was the DLS bike you had last year who has it now?

you do LOL LOL.......its the white monnie u bought off tony, who bought off me, who bought off Teetol, who got it off DLS when they *closed * and the one that TP is riding next year

[domski]

MLC Racing is Dave Ainscough, aren't you Dave. He owns the ex-Clint DeTarnowsky DLS bike, which finished 2nd in 2005.

Chass & Louigi Moto now own the 'other' ex-DLS bike (Mike Dawson's) which Tetol, Fil2 and Couch owned.

Clear?

[domski]

Incidently, I don't have a slipper (apart from that servo thingy) and it's fine. Don't need a slipper thanks - unless you can't change gear properly???

What did they do in WSB/GP 10 or 15 years ago? Slipper my arse!!

We're riding 60bhp road bikes ffs