old hands need new clutch..devolution
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Addicted
Old douglas ..smallie with polini 115..super with nasco 177
Joined: 07 Nov 2013
Posts: 529
Location: New Zealand
Thu May 09, 2019 12:56 pm quote
at 52 its getting harder to pull the clutch handle in.....all because of stronger springs, 4 plates. banded baskets 22 teeth that I installed through my 40s to harvest power from the tuning bug

Twas thinking of devolution using a stock standard clutch and springs in a dr177 tune and then thought someones had prob done it already

will it slip?
Molto Verboso
1979 P150X, 1983 P200E, 1987 T5, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1384
Location: Veria, Greece
Thu May 09, 2019 1:21 pm quote
COSA II clutch, 4 stock springs & 4 SIP "L" springs, CR80 plates and it's like butter on my Ratty longstroke PX200. If you want to take it further, the MRP "adjustable" actuator will help even more...
Ossessionato
1979 P200e
Joined: 18 Mar 2013
Posts: 2357
Location: West of Boston
Thu May 09, 2019 2:59 pm quote
OK, first thought that popped into my head....

Are we not men? We are DEVO!

Which actually stood for de-evolution

[img]http://stmedia.stimg.co/ctyp_devo_press.jpg?w=800[/img]
Addicted
Joined: 03 Nov 2011
Posts: 933
Location: Racing Capital of the World
Thu May 09, 2019 3:22 pm quote
DR177 does not need anything but a stock, 6 spring clutch. It will not slip.
Hooked
2006 px125
Joined: 28 Sep 2016
Posts: 105
Location: Not Sunny Southport
Thu May 09, 2019 3:24 pm quote
https://beedspeed.com/products/vespa-clutch-easy-clutch-full-kit

I've knackered hands/wrists and stumbled on this whilst looking for future mods due to health
Addicted
Old douglas ..smallie with polini 115..super with nasco 177
Joined: 07 Nov 2013
Posts: 529
Location: New Zealand
Thu May 09, 2019 6:45 pm quote
whip it good
Woops..should have mentioned its VBC cases so PX 200 clutch wont fit (even tho I have ground away the oil channel in the clutch cover to accommodate the banded basket (smaller diameter clutch to PX)

yo ruffstuff...I could not see any deets on the easy clutch..how do they achieve it.....physics and fulcrums on the lclutch cover lever?????
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 6783
Location: Victoria, Australia
Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1007
Location: UK (South East)
Fri May 10, 2019 12:40 am quote
I'm using a stock Cosa II in my PX/DR177. It operates perfectly and is a breeze to use. It's my city scoot, as none of my other PXs are welcome in central London any more (ULEZ). The light clutch is a real bonus in traffic, combined with the peppy pull of the DR.
Hooked
2006 px125
Joined: 28 Sep 2016
Posts: 105
Location: Not Sunny Southport
Fri May 10, 2019 12:47 am quote
Re: whip it good
Bluecati wrote:
yo ruffstuff...I could not see any deets on the easy clutch..how do they achieve it.....physics and fulcrums on the lclutch cover lever?????
I presume it's a cable guide/ in there so you pull cable 1 and it makes cable 2 do more work, like a problem solver for a mtb mech, only guessing tho
Member
1972 Vespa Rally 180
Joined: 28 Mar 2012
Posts: 44
Location: Austin, TX
Fri May 10, 2019 6:52 am quote
Yep, it's using the mechanical advantage of a fulcrum. Move the center of effort out from the pivot point and it multiplies the force exerted.
Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1007
Location: UK (South East)
Fri May 10, 2019 7:49 am quote
Re: whip it good
Bluecati wrote:
Woops..should have mentioned its VBC cases so PX 200 clutch wont fit (even tho I have ground away the oil channel in the clutch cover to accommodate the banded basket (smaller diameter clutch to PX)
Cosa clutch fits fine in my VBC case. It's the banded SIP Sport type and case is 1976 VBC. Like Sprint V or early P series, but with old crank + bearings setup.
Molto Verboso
1979 P150X, 1983 P200E, 1987 T5, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1384
Location: Veria, Greece
Hooked
1974 Vespa Primavera 125, 1980 Bajaj Chetak
Joined: 07 Jul 2017
Posts: 356
Location: Boston, MA
Mon May 13, 2019 6:54 am quote
Crimaz makes a push rod clutch that is supposed to be great. It's available for about $60 and available from SIP. You could also go with a hydraulic clutch.
Molto Verboso
px200
Joined: 13 Apr 2010
Posts: 1261
Location: london
Mon May 13, 2019 1:51 pm quote
I assume you have tried a dogleg lever.

Grumpy
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