ADVrider

Go Back   ADVrider > Bikes > Trials
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-11-2013, 11:58 AM   #1
GAwoody83 OP
Gnarly Adventurer
 
GAwoody83's Avatar
 
Joined: May 2010
Location: Good Hope, GA
Oddometer: 172
Beta TR33 Hydraulic clutch retrofit

Hey guys, I have been riding around on my brothers 99 Sherco and noticed how much of an improvement the hydraulic clutch really is. I was wondering if anyone has retrofitted a hydraulic clutch system such as a Magura setup on to the older trials bikes. Thoughts, Ideas?


Link to something simular.
http://www.ebay.com/itm/Magura-Hydra...#ht_1102wt_873
GAwoody83 is offline   Reply With Quote
Old 09-11-2013, 02:00 PM   #2
lineaway
Beastly Adventurer
 
Joined: Oct 2011
Location: nm
Oddometer: 1,754
Quote:
Originally Posted by GAwoody83 View Post
Hey guys, I have been riding around on my brothers 99 Sherco and noticed how much of an improvement the hydraulic clutch really is. I was wondering if anyone has retrofitted a hydraulic clutch system such as a Magura setup on to the older trials bikes. Thoughts, Ideas?


Link to something simular.
http://www.ebay.com/itm/Magura-Hydra...#ht_1102wt_873
If you are crazy enough to want the hydraulic on your bike that has finally made it to vintage status, just find a trashed techno and all the parts would probably fit. A good working cable clutch on the old beta`s did not pull hard, but it was an improvement. Personally I would just upgrade to a newer bike and keep the tr33 for vintage.
lineaway is offline   Reply With Quote
Old 09-11-2013, 11:31 PM   #3
Twin-shocker
Beastly Adventurer
 
Joined: Jan 2012
Oddometer: 1,673
Quote:
Originally Posted by GAwoody83 View Post
Hey guys, I have been riding around on my brothers 99 Sherco and noticed how much of an improvement the hydraulic clutch really is. I was wondering if anyone has retrofitted a hydraulic clutch system such as a Magura setup on to the older trials bikes. Thoughts, Ideas?


Link to something simular.
http://www.ebay.com/itm/Magura-Hydra...#ht_1102wt_873

Why not try a hydraulic intended for pit-bike use? They are very cheap and dont look too badly made.

If no good, then the Hebo hydraulic is much better than the Magura. Changing from cable clutch is well worth doing, and will make bike nicer to ride.
Twin-shocker is offline   Reply With Quote
Old 09-12-2013, 04:26 AM   #4
Monty348
Adventurer
 
Monty348's Avatar
 
Joined: Oct 2007
Location: Pennsylvania
Oddometer: 57
This guy tried a conversion.
http://www.motorspecial.it/sezioni/t...beta_tr_34.htm

Google Translate version
http://translate.google.com/translat...%26prmd%3Divns
Monty348 is offline   Reply With Quote
Old 09-12-2013, 06:21 AM   #5
motobene
Motoing for 43 years
 
Joined: Mar 2013
Location: Wichita Mountains SW Oklahoma
Oddometer: 623
The Betas of that era did not have great clutch designs. Vague feel and too much drag even after pulling the lever a long way. You could do a fantastic job converting to hydraulic actuation and then bump into limitations of the crude clutch design.

I used to make the older bike clutches work as good as could be expected by making my own clutch cables from the excellent Japanese TSK cables used on many Japanese bikes with cable clutches. The TSK cables are tough and have the low friction inner plastic sheath. Then I'd lube them with oil instead of running them dry. I'd go to a local moto shop, back when they had a rack of cables for various bikes, pick one that was close, and get the length right. These days picking one may be hard because they'll say, "I can order one for ya. Which one you want?" To which I'd reply, "I can't know without seeing the cable." And we vainly loop.

Sometimes I'd tweak the length of the actuating arm. I could lengthen them for easier pull, but only on clutches that would fully release earlier in the lever throw. Maybe you have a beta that does that. If not, no type of actuation improvement will get you away from a dragging clutch or a really stiff lever.

No wait! There is another trick! If that Beta uses an even number of clutch springs you can remove two of the springs to reduce drag and ease the pull. If the clutch doesn't slip under power you'll like the clutch a bunch more.
motobene is offline   Reply With Quote
Old 09-12-2013, 09:59 AM   #6
Rockcat
LDA
 
Rockcat's Avatar
 
Joined: Oct 2005
Location: Portland, OR
Oddometer: 341
Quote:
Originally Posted by GAwoody83 View Post
I've ridden a YZ450 with one of these kits. I did not notice it being substantially better than a cable. It certainly did not turn it into a KTM.
Rockcat is offline   Reply With Quote
Old 01-04-2014, 02:32 PM   #7
GAwoody83 OP
Gnarly Adventurer
 
GAwoody83's Avatar
 
Joined: May 2010
Location: Good Hope, GA
Oddometer: 172
ok so I have been tinkering with the setup and have come to this:
new bolt/slave cylinder holder
rotated the clutch pull lever forward
Magura kit for a 94-02 Kawasaki kx125 with a 41mm rod, actuall pull is from 56-59mm

so far the pull is nearly effortless, just need to finish some other projects on the bike to tell if it will actually work or if i will need to change out the rod or do some other mods to it to increase the length of the pull form the slave cylinder.



GAwoody83 is offline   Reply With Quote
Old 01-05-2014, 09:33 AM   #8
motobene
Motoing for 43 years
 
Joined: Mar 2013
Location: Wichita Mountains SW Oklahoma
Oddometer: 623
That's a slick looking kit.

You describe pull as "nearly effortless." What about clutch action? With respect to lever travel when set up to be ergonomic (not too far out or in when fully released), how far in does the lever have to go to slip release the clutch, and to fully release the clutch?

How sticky is snicking in to neutral at idle, lever fully in, engine warmed up?

Just curious how substantial an enhancement this is for the older clutch designs. How much did it cost? (If you haven't mentioned that already).
motobene is offline   Reply With Quote
Old 01-05-2014, 10:21 AM   #9
GAwoody83 OP
Gnarly Adventurer
 
GAwoody83's Avatar
 
Joined: May 2010
Location: Good Hope, GA
Oddometer: 172
The kit was 200 from eBay and it was new, I haven't tried the bike out yet as I am waiting for a replacement bushing for the rear suspension, then I will tell more about it and hopefully all is well with it.
GAwoody83 is offline   Reply With Quote
Old 02-07-2014, 07:43 AM   #10
GAwoody83 OP
Gnarly Adventurer
 
GAwoody83's Avatar
 
Joined: May 2010
Location: Good Hope, GA
Oddometer: 172
Ok so all is on and works great, will go back and add in a spacer to pull the clutch arm a little more so that I am not using all the action of the slave cylinder.
GAwoody83 is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 12:04 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014