Author Topic: Slipper Dry Clutch (Read 22486 times)

mec · « **Reply #25 on:** April 14, 2011, 02:42:16 AM »

hello,

yesterday i brought all the related parts to my transmission machinist. according to him, it will take up to 6 weeks until all the parts are done.

i will report, when there are news.

mec

jaguar · « **Reply #26 on:** May 02, 2011, 12:44:40 PM »

thats along time to wait and see how this will turn out.....

CR750 · « **Reply #27 on:** June 06, 2011, 12:44:13 PM »

Hi Mec,

6 weeks are over by now - so how dry is your clutch

?

Ps. I love reading your threads - Filled with detailed tech info on the SOHC engines/bikes and great pics. THNX for sharing !

mec · « **Reply #28 on:** June 06, 2011, 01:20:22 PM »

thanx for reminding me that 6 weeks are over.
the latest news from my transmission man (~ one week ago) was, that the transmission shaft was nearly finished and was ready to be shipped for fabrication of the DIN5482 toothing on this shaft.
it seems that its not easy to make such an "strange" toothing (although the toothing is a stock ducati feature). from what i understand is, that this toothing cant be done on an ordinary mill. it takes a gear machining mill with milling cutter in the +700€ range.
after the toothing is done, the shaft needs to be hardened and grinded (?). i can tell you more, when all the parts are in my house again, what will happen the next days (i hope).

in the meantime i am wood working and building something like a garden-house

from trees to buildings.

mec

wannabridin · « **Reply #29 on:** June 06, 2011, 01:25:07 PM »

geeze! are there any tools you dont have??

progress is lovely, i can't wait to hear the racket it's going to make!!

CR750 · « **Reply #30 on:** June 13, 2011, 11:58:16 AM »

Something like a garden house - definition
a shed mostly made of wood to accomodate ones motorbikes, or parts thereof.

and Mec..... most of buy the planks of wood to build a shed in the DIY store, hell... most of us buy the complete shed there, you primeval man

mec · « **Reply #31 on:** June 28, 2011, 07:25:12 AM »

hi,

garden house is finished

.

tomorrow we will start our journey to the 4h of Spa. My raceguzzi wants to be moved. we will see if it eats another kardan (or better we will finish the race).

my transmission guru told me, that all parts for my dry clutch will be finished on monday. my plan is to tear down the engine on tuesday and assemble it again with all the goodies on wednesday. first rollout should take place at the "rupert hollaus gedenkrennen" (http://www.igfc.at/bilder/red2011.jpg) at the Red Bull ring in austria the following weekend.

this sounds like stress is coming.

mec

mec · « **Reply #32 on:** July 06, 2011, 12:41:12 PM »

hi folks,

we write the 6th of july 2011 and my slipper clutch came to life, yeahhh.

just two words to Spa: the event was awesome as it is each year.
but: it seemed to me that the main focus is "how to make money". the practice sessions for the endurance riders are becoming shorter and shorter. all other classes have priority (free riding in countless groups, electric bikes practice and race, side cars, superstars demosessions, two stroke class, guzzi demo ride..............). this is where the money is.
in addition there is a more than obscure technical reglement which led to many discomfort during the technical acceptance. many teams complained to have problems with the technical commissaires (i dont want to go into detail, often it was ridicolous). another consequence of this fact was, that the winning segarra guzzi was disqualified after the race. till now it is unknown why (from official side).
for us all ran fine. our guzzi seemed to withstand all the stress and loads put on the engine and drive train, till.......in the night time the track was covered with oil and this led to a crash of our #1 rider. rider ok, the bike with minor damage, but not repairable at the track.
next week i will find time to restore the bike.

to be continued

mec · « **Reply #33 on:** July 06, 2011, 12:44:05 PM »

slipper dc:
on monday i received all missing parts: longer transmission shaft, clutch hub for the outer clutch basket, corresponding 1st gear wheel on the main shaft.

monday evening the engine was separated from the bike. tuesday the engine disassembled, all the new parts incorporated (this took some time, cause i had to shorten screws connecting the hub and basket, make fit the hub sliding on the primary gear, took 2 hours, a.s.o.).
but it seemed that everything came perfect together. tuesday evening the engine was in the frame again. today i mounted the rest of the periphery, filled oil and made the definitive assembling of the clutch.

i started the bike with my external starter and it run immediately (carbs are a little bit on the rich side). the first thing i mentioned was the wonderfull rattle of the disk plates. i love this song.
switching into first i learned that it is difficult to come into neutral again (probably because of the one slighly bent steel plate). next thing i was surprised that there was no slipper effect during starting. ok, i started with a 1300N secondary spring, which is in the medium range.
i did a short test ride at home, nothing abnormal to notice.

the bike came back in my shop, i added half a liter oil, changed the above mentioned disk plate to a normal one and replaced the spring by a 950N one.
further tests will follow.

conclusion: at the moment it seems that all works fine. when the complete setup works one or two racing seasons, i would call it a successfull upgrade.
overall costs: 2500€ clutch, 1200€ transmission parts, 100€ gl1000 primary, some small parts and a lot of work.

mec

p.s.: big thanks to Martin Slancar (transmission guru)
ditto to Roger Sutter from Suter technologies

Tintop · « **Reply #34 on:** July 06, 2011, 02:05:33 PM »

Congrats mec, a very nice, clean install. Look forward to hearing how it does in the races.

Flying J · « **Reply #35 on:** July 06, 2011, 02:37:08 PM »

Very nice, we need a video with some sound.

Syscrush · « **Reply #36 on:** July 06, 2011, 04:55:34 PM »

That is really beautiful. If you have to lowside, make sure you do in in a left-hander!!!

Retro Rocket · « **Reply #37 on:** July 06, 2011, 05:53:55 PM »

Excellent work as always Mec....

Godffery · « **Reply #38 on:** July 07, 2011, 03:22:56 AM »

Hello Mec,
I've just been checking out your thread (Very nice technical work BTW) and please forgive me if you've already hit on this subject but I didn't see any conversation regarding your dissension to retain the Kick starter shaft; was that so you had a backup plain if your paddock starter failed?

mec · « **Reply #39 on:** July 07, 2011, 08:16:22 AM »

thanx for all the positive feedback.

Quote from: ffjmoore on July 06, 2011, 02:37:08 PM

Very nice, we need a video with some sound.

shall i tell you, there are soo many things that i need

eventually we will do some vids this weekend.

[/quote]

Quote from: Syscrush on July 06, 2011, 04:55:34 PM

That is really beautiful. If you have to lowside, make sure you do in in a left-hander!!!

i will try

[/quote]

Quote from: Godffery on July 07, 2011, 03:22:56 AM

Hello Mec,
I've just been checking out your thread (Very nice technical work BTW) and please forgive me if you've already hit on this subject but I didn't see any conversation regarding your dissension to retain the Kick starter shaft; was that so you had a backup plain if your paddock starter failed?

to have a kickstarter is always a good option if you dont have an electric starter.
btw there is no way to remove the kickstartershaft because the oil pump is driven by a gear wheel sitting on this shaft.

mec

Godffery · « **Reply #40 on:** July 07, 2011, 09:52:28 AM »

Quote from: mec on July 07, 2011, 08:16:22 AM

to have a kickstarter is always a good option if you dont have an electric starter.
btw there is no way to remove the kickstartershaft because the oil pump is driven by a gear wheel sitting on this shaft.

mec

I can't argue with that logic.
BTW; looking at your talents, Id say if YOU decided to remove it, you'd figure out a way. ; ]

mec · « **Reply #41 on:** July 11, 2011, 04:06:31 AM »

hello girls,

this weekend there was the 8th Rupert Hollaus Memorial Race held on the Red Bull Circuit (former A1 Ring, Österreichring) in Austria.
best weather, on the hot side 34°C however.

my first rollout with the new Suter Clutch was trouble free. everything works fine, however there is a lot of work to come: fine tuning of the system.

till now (35° ramp inserts, 950N secundary spring, medium primary spring) the clutch works as a normal clutch. i could not feel any slipper effect (exept on the external starter).

but i am happy that the bike ran troublefree as the clutch system did.
some more test runs on various circuits will come and i am sure, that once the clutch has its proper setup, it will be a great benefit for fast laps.

i drove the bike myself for the first practice session and put it on 9th place (from 60 competitors). a friend of mine rode it in the second practice session and the result was a 6th place. if he had done the first session too, i estimate we would have been on 3rd. not bad.

of course there are some vids too:
Suter Slipper Dry Clutch on Honda CB 750 Four

Rupert Hollaus Gedenkrennen 2011 Red Bull RIng

Rupert Hollaus Gedenkrennen 2011

mec

wannabridin · « **Reply #42 on:** July 11, 2011, 12:59:26 PM »

brilliant.... sounds amazing, wish i could see it in person!! great work Mec!

Syscrush · « **Reply #43 on:** July 11, 2011, 01:08:02 PM »

Think you might do some glamor shots of the whole bike at some point? Your fabrication skills are amazing and it would be great to see something that really shows this machine off!

Slams77 · « **Reply #44 on:** July 11, 2011, 11:09:01 PM »

Wow, that sounds awesome!

Retro Rocket · « **Reply #45 on:** July 12, 2011, 12:35:21 AM »

Quote from: wannabridin on July 11, 2011, 12:59:26 PM

brilliant.... sounds amazing, wish i could see it in person!! great work Mec!

+1 inspirational....

Godffery · « **Reply #46 on:** July 12, 2011, 04:47:14 AM »

+2
If this beauty hasn’t been in "the bike of the month" yet, it certainly should be now!

Lostboy Steve · « **Reply #47 on:** July 12, 2011, 05:34:58 AM »

You should post that on the kneeslider they are always looking for "different" motorcycle stuff. Very sweet setup congrats!

wannabridin · « **Reply #48 on:** July 12, 2011, 02:18:53 PM »

i wish i could have half your fabrication skills!!! maybe one of these days....

mec · « **Reply #49 on:** August 25, 2011, 12:16:49 PM »

hello,

again, thanx to all for your positive feedback.

in the meantime I did some minor changes to the clutch internals: after some measurements and drawings my cnc mill altered the inner clutch basket to except the three heels, or called by suter "rack element set". the back plate got three 3mm holes to except the pin of each heel. last but not least the clutch hub (hard steel) had to be grinded on three spots to make a free movement of these heels possible.

I have done this changes in order to make possible to start the engine with my external paddock starter. now the heels are blocking the slipper mechanism around idle rpms. with more rpms the centrifugal forces presses the heels outward and give free the slipper mechanism.
this will make possible to use the wide range of adjusting components (ramps, springs, thickness of the plate package, ...) without beeing limited by the use of my external starter (slipper effect during starting procedure).

next rollout will take place end of september raceway Rijeka.
we will compete with my race guzzi in the 2hours "endurance race" (second bike laverda 1000). the short runs with my honda-egli-replica will be done by a friend of mine. I feel more comfortable to watch the races, maybe I will do one turn by myself. I know that I am not the slowest one, but beeing far, far away from becoming world champion.

btw: three weeks ago I became vice World Champion Senior at the table soccer world champion ship held in Oberwart, hihi.

mec

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Author Topic: Slipper Dry Clutch (Read 22486 times)