Two Speed Automatic Transmission

Discussion in 'Hubs, Gearboxes, Sprockets and Chains' started by msrfan, Apr 14, 2013.

  1. msrfan

    msrfan Well-Known Member

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    Made a bracket to hold my catch can and got rid of the hose clamp. Looks like I need an elbow for the top hose.



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  2. Trey

    Trey $50 Cruiser

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    You sure have kept the quality up on this whole deal, looks great.
    I found some brass-like elbow fittings that have one barbed end, and one threaded, in the plumbing section of the hardware store. I think that might work for you... Here's a pic of the one I use. Good luck!
     

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  3. msrfan

    msrfan Well-Known Member

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    Thanks Trey, I'll check out that fitting.
     
  4. msrfan

    msrfan Well-Known Member

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    Well, the bike held up well at the last Grange race. Down in power with the altitude but shifted perfectly and finished. Looks like I'm building too much crankcase pressure and blowing a lot of oil out. My PTO side crank seal was pushed out allowing some leakage and the stock breather doesn't seam to keep up. I'm going to try to fab up a bigger, better breather and see if that helps. I used blue loctite to hold the seal in and may need to plumb to the intake to help evacuate. It's hard to get to the oil fill/dipstick with my new chain guards in place, so I installed a 1 1/4'' sight glass in the side cover to check the oil level.


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  5. culvercityclassic

    culvercityclassic Well-Known Member

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    Looks great Dale
     
  6. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Very nice, that sight glass worked out pretty slick......I really like your primary cover as well.
     
  7. silverbear

    silverbear The Boy Who Never Grew Up

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    Dale,
    Just wanted to say that I admire what you are able to do... make up a transmission like that... work out the problems with clever solutions... and your willingness to share with others here speaks well of you as a person and forum member.
    Well, sir, it is pretty remarkable. I don't have the skill to be able to apply what you have shared, but I can see it and comment as a kind of cheer leader. Well done sir! And down the line someone who has seen this will think of a refinement and make it better yet.
    And so this sport/hobby/fascination keeps getting taken to new levels of excellence. You guys amaze me.
    SB
     
  8. msrfan

    msrfan Well-Known Member

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    Thanks Jeff, add-ons and improvements are always a lot more fun than repairs.
     
  9. msrfan

    msrfan Well-Known Member

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    Thanks Scotto, I carved out the cover so I could see more, and it looked too klunky before. Have you had to modify your breathers with your four strokes?
     
  10. msrfan

    msrfan Well-Known Member

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    Thanks SB, I'm okay at roughing out stuff, but I'll leave the artistic and aesthetics to guys like you. Keep plugging and we'll get some more projects done.
     
  11. SemperKeith

    SemperKeith New Member

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    I would just like to second this well said complement, plus, you are just oozing talent and creativity. Just jaw dropping amazing. You certainly give us all a high bar to strive for in this wonderful motor bicycling world. Thanks for sharing.
     
  12. msrfan

    msrfan Well-Known Member

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    Thanks semperkieth, I have a lot of fun building this stuff and I'm glad others enjoy it too.
     
  13. Tang

    Tang New Member

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    Very good work. Nice trans. I have learned a lot from this forum in the short time learning and working with MoBs. Wish there was more people in Indianapolis.

    Keep up the good work

    Tang
     
  14. msrfan

    msrfan Well-Known Member

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    Thanks Tang. Yeah, I knew everything until I joined this forum and found I knew nothing.
     
  15. ratman150

    ratman150 New Member

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    How has the tranny been? I keep stumbling upon this post (and just today figured out how it works). What kind of engine do you have as well?
     
  16. msrfan

    msrfan Well-Known Member

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    Hey ratman. The tranny works great. I'm still playing with different internal sprocket ratios, clutch springs and weights, just to see what's the best engagement and shift rpms. I guess it's the best it will ever be with the simple (cheap) Max Torque clutches. They seem to have a lot of slop and could benefit from blueprinting, but there's not a lot to work with. A precision clutch would do much better but cost around $300 each and are much bulkier. So I'll use it as is because it's as compact as I can get it. Overall I'm happy with it and it's a joy to ride. I just get out with traffic like a real motorcycle and avoid the fast and busy streets. I'm working on an adjustable timing mechanism now, so I can introduce some advance at higher rpms making it start real easy and add top speed. Thanks for the inquiry.
     
  17. chargehard

    chargehard New Member

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    this is awesome
    guys im new here, but if anyone wants a hand just ask
    love inventing stuff, looks like ill be right at home here
     
  18. MEASURE TWICE

    MEASURE TWICE Well-Known Member

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    This is a bit of an old thread but msrfan is still on the site posting. Tony01 I think it is also made a bike using the two clutch idea for two speed automatic and has a hf tool predator 212 running it. I had come across this thread prior so thanks, & welcome!
     
  19. motorhedfred

    motorhedfred Member

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    I know this is an old thread but I've been toying with this type of centrifugal clutch based multi-speed transmission, running the power flow through from the engine through the various clutches, chains and sprockets. I can't wrap my mind around whether there's any compression (engine) braking with it. Part of me thinks it dies at the last freewheeling sprocket closest to the drivewheel and another part of me thinks as long as either of the clutches are engaged, there's compression braking.

    If not, would keyed sprockets that freewheel in the opposite direction catch on deceleration for engine braking? Another part of me thinks that would just lock up the whole shebang.

    My brain hurts.
     
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  20. curtisfox

    curtisfox Well-Known Member

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    #60 curtisfox, Nov 15, 2019
    Last edited: Nov 15, 2019
    motorhedfred likes this.

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