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Mr Riggs Hydraulic Clutch Conversion

Discussion in 'The Garage' started by Bewarethemoon, Jul 30, 2020.

  1. ShaggyMech

    ShaggyMech Socal Mechanic.

    Thank you very much! I have a very hot motor running about 12:1 and the smoother the clutch the better. I will be very excited to have this on my experimental bike.
    buzzword and Bewarethemoon like this.
  2. Boy this is really taking off, personally I can’t wait either
    Bewarethemoon likes this.
  3. Bewarethemoon

    Bewarethemoon XS650 Junkie XS650.com Supporter Top Contributor

    Sounds very interesting! @ShaggyMech

    Do you have a thread with more information on your engine? I’d love to know more as I’m building a ‘hot’ engine myself.

    Paul Sutton likes this.
  4. Bewarethemoon

    Bewarethemoon XS650 Junkie XS650.com Supporter Top Contributor

    It really does seem to be, I didn’t expect quite this much interest to be honest but I’m thrilled that there has been! Feels good to be able to offer something that people are into and kick back to this great community.

    As I said a few posts back I’m stopping by my machinists place after work Wednesday, I fully expect he’ll have the slave body pretty much finished so I’ll take a few photos.

  5. Bewarethemoon

    Bewarethemoon XS650 Junkie XS650.com Supporter Top Contributor

    Please correct me if I’m misunderstanding @kopcicle but one solution could be for you guys to measure the depth of your casing where the slave cylinder passes through and we can cut the cir-clip groove to suit?

    Obviously then your slave cylinder would be matched to a particular casing but I don’t think that would be a huge issue would it?

  6. A specific made to measure is obviously preferred, but do the side covers vary much from model to model? I would not have thought so; however, to be confident that the fit is appropriate then surely a few shims inside the cover between the side cover and master cylinder should do the job if necessary ... better to have a bit more than not enough depth.

    Bewarethemoon likes this.
  7. Bewarethemoon

    Bewarethemoon XS650 Junkie XS650.com Supporter Top Contributor

    I’m with you on this @Slippery

    I think it would be helpful if we could get a few measurements off various side covers to get a bit of picture here.

    TwoManyXS1Bs likes this.
  8. 650Skull

    650Skull SSSSSSSSSlither Top Contributor

    Clutch push rod will determine the difference.......2M did a lot of work with the clutch and at one time got some push-rods made, do a search
    gggGary, Paul Sutton and TwoManyXS1Bs like this.
  9. 650Skull

    650Skull SSSSSSSSSlither Top Contributor

  10. Bewarethemoon

    Bewarethemoon XS650 Junkie XS650.com Supporter Top Contributor

    That’s brilliant @650Skull Thank you!

    I do love a good rabbit hole to clamber down, especially some of the well informed ones on this forum!

    I’ve quickly skim-read the first two pages of the thread, it has me wondering about offering the 1 piece alloy clutch push-rod with steel tips like @TwoManyXS1Bs had made??? With his permission of course.

    Last edited: Mar 29, 2021
  11. GLJ

    GLJ Never go faster than your guardian angle can fly. Top Contributor

    gggGary and TwoManyXS1Bs like this.
  12. wannabridin

    wannabridin XS650 Guru

    2M's rods are one piece 7075T6 aluminum. It's quite a nice piece and comes in one length that he determined ideal length.
    gggGary, TwoManyXS1Bs and buzzword like this.
  13. ShaggyMech

    ShaggyMech Socal Mechanic.

    When I get around to tearing the engine down for refresh I will go through a detailed analysis. I am going as far as I can without breaking cases.
  14. Just to come back to the clutch spring analysis - I have never understood why they are so stiff in the 650 ... in my early days of fast 2 strokes, riders always rode with 1-2 fingers on the clutch lever ; as that's all it took to disengage when a seizure lept up to get you (1960s) before Suzuki introduced posiforce lubrication, then everybody did it and no more lock-ups. I believe the springs are way over engineered and to relieve the issues of drag etc just delete a plate or two to relieve the pressure; should they then slip just add washers behind the springs to micro adjust pressure. Anyone else have some thoughts?
  15. joebgd

    joebgd XS650 Junkie

    What do you mean by that?

    I prefer my original 2 piece push rod. I feel the middle ball keeps it from spinning in the seal and apparently a much better heat differential than the oem 1 piece.
    gggGary and TwoManyXS1Bs like this.
  16. kopcicle

    kopcicle antidisestablishmentarian

    1,2,4,8,16~ thousands of an inch
  17. kopcicle

    kopcicle antidisestablishmentarian

    Early two stroke seizures were characterized by a slight loss of power and a sudden welding of the piston to cylinder.
    It's something of a geographical joke. If you weren't there you don't get it.
    Imagine riding along and having a broom handle stuffed into your rear wheel...
    Mailman, gggGary, Paul Sutton and 5 others like this.
  18. madmax-im

    madmax-im Yamaha...Go your own way... XS650.com Supporter Top Contributor

    My clutch lever is so hard to pull..Arthralgia in my hands makes it difficult at best to operate the brake and especially the clutch lever...I'm on the fence over what to do yet..Lets see how this plays out...but I am interested..
    gggGary and Paul Sutton like this.
  19. RC4MAN

    RC4MAN XS650 Addict

    Back in the day, knew a lot of guys with RD350 cafe racers, a couple worked at the local Yam dealer and had access to mod their engines even as far as buying the aircooled TR350 racer cylinders, heads and pistons to fit on them. We'd take them up to Summit Point Raceway for track days.
    They always said, "Keep one finger on the clutch lever at all times, if you feel the slightest reduction in power pull the clutch in because a seizure is eminent"
    Mailman, Team Junk, gggGary and 3 others like this.
  20. ShaggyMech

    ShaggyMech Socal Mechanic.

    Mailman, gggGary and Bewarethemoon like this.

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