Big Wheel Dual Range dune climbing desert bike

Discussion in 'Some Assembly Required' started by WILL_S, Feb 19, 2015.

  1. WILL_S

    WILL_S OUTLAW POSTIE 001

    Joined:
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    Stuck on mounting system for back engine mount ...needs to adjustable. The idea is to make the countershaft sprocket pivot for chain tensioning to the jackshaft. It also needs to pivot forward of its original mounting to clearance dual range case to countershaft.
    I can pick up the 4 case bolts that foot pegs /bash plate mount too (circled in red ) . I also have turned a spacer (red arrow) that runs between the centre stand mount ..possible attachment . The whole lot can be braced up to the old bash plate top mounts .
    Idea 1 : slot plate that attaches to case via footpeg mounts (to pivot motor ) brace up to top bash plate mount and back to centre stand mount . Motor pivots on slots.
    Idea 2 : same as 1 but no slots on footpeg mount plate . Then sandwich 2 plates , one tapped and one slotted . These would mount behind footpeg mounts . Welded to the footpeg/bashplate mount one plate , the other plate would be welded to the centrestand spacer . Maybe 5 bolts to clamp plates.
    Idea 3 ...Open to ideas ... Got any ?

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  2. Pezz_gs

    Pezz_gs Cant ride for crap

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    @WILL_S how much do you think that short length of chain will stretch?

    Maybe carry a spare primary chain and swap it out when needed. . . . :hmmmmm

    Actually that assumes its the correct length right now. . . .

    What about an eccentric chain adjuster type swingarm pivot ala early Ducati??

    Either in the frame or the swingarm pivot . .. .
  3. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Won't stretch much , not many links.
    Mostly just moving motor to clear sprocket with advantage of chain tension . It's nearly right tension when I push the motor as far forward as it will go. Got a 13t coming to make up another jackshaft sprocket which gives a little more clearance
    Did you end up mounting a quad rim to the rv hub ?
    It's looking like 12" is the go for car tyre selection , rolling diameter + width ,when I mount the hack .

    Rtw Hack Mk1... whats left of it...runs hinges to pivot it up against bike for shipping, MK2 doesn't .
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  4. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Motor adjuster might be sorted .
    New bashplate / subframe has a couple of bungs welded in that some slotted plates bolted to the motor can move along and be locked off . Still swings off the standard top engine mount .
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  5. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Chain tension is getting closer

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  6. WILL_S

    WILL_S OUTLAW POSTIE 001

    Joined:
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    Slotted adjuster/ chain tensioner .
    Motor pivots and is bolted thru top mount and bolted to the subframe, where it can be adjusted .
    Thinking about running a threaded adjuster and locking nut off the middle of the subframe up onto the motor .
    Once it's running I will know if the motor is going stay solid on the slotted mounts or if needs the extra adjuster /locking point to stop it moving back .

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  7. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Fuel and esky carrier
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  8. WILL_S

    WILL_S OUTLAW POSTIE 001

    Joined:
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    June this bike leaves for a big trip.
    Better sort a engine
    Stroked & bored to 125 ....

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  9. WILL_S

    WILL_S OUTLAW POSTIE 001

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    @DRjoe on the tools grafting two cases so the dual range motor can run
    110x 12v dc converted stator .
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  10. gkam

    gkam Been here awhile

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    :clap:clap:clap
    You have skills, imagination and risk!
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  11. WILL_S

    WILL_S OUTLAW POSTIE 001

    Joined:
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    And some good mates who are better skilled .

    Chair nearly fully mounted
    48 days to the deadline

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    So many brackets being fabbed
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  12. WILL_S

    WILL_S OUTLAW POSTIE 001

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    It's a roller again
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  13. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Nearly got rear brakes and something to rest my feet on. Left side small amount of flex that needs stiffening

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  14. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Rear pedal needs a bit of heating and shaping and some spacers

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  15. WILL_S

    WILL_S OUTLAW POSTIE 001

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    Bit of heat and now the brake pedal is offset

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    Footpeg bracket stiffened up and lightened :D
    Paint on a few bits ...getting closer

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    Hopefully fork legs and some triple trees and brakes turn up this week .
    Then it's lathe and welding time to get it to fit .
    Heaps of parts to turn up to get road legal
    Motor is about to come apart to see the gearbox condition and add 125 internals .
    34 Days to go
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  16. Z50R

    Z50R Not lost yet

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    Can you please expand on what is happening here? I am in the process of combining an S90, ATC125m, and a CT110(dual range). The last sticking point for me is getting a 12 volt stator in the 110 side case. My plan was to use the ATC125m flywheel and stator by milling the inside of the CT110 side case and fabricating a new mount for the stator. You apparently have a different solution and I’d like details if you are willing to share.

    What other engine are you grafting in for the 12 volt stator?
    Does your dual range CT have the CDI pickup coil on the head or on the flywheel?
    How about the engine being grafted in?
    Are you using the flywheel from the engine you are grafting on or the dual range CT110?

    Thank you!
  17. WILL_S

    WILL_S OUTLAW POSTIE 001

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    G'day
    We are limited down under for bits
    Here is my solution.
    I am using a ct110 dual range 6 volt motor as the base . I wanted 12 volt .
    I am using a atc125 crank which has had the taper brought in to match the CT offset ( I have used this before when building 125 CT110 and i have a detailed thread on a aussie forum )
    My good mate Drjoe welded the CT dual range case to accept the front half of a CT110X stator cover. What this gives you is the ability to use a 12v stator and the ignition pickup in the stator cover ( originally in the head ). Also the ct110x 12 volt flywheel is used .
    To fit the atc125 piston I am using a aftermarket ct110 barrel bored to suit and a 6mm spacer plate under the barrel to line everything back up .
    Simple
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  18. Roofchop

    Roofchop Hands up mother stickers, this is a f**k up!

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    Simple:lol3
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  19. GR0NK

    GR0NK Got some screws loose!

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    IIRC this gives you basically a narrow 125M motor. The stock 125M has the wide pull-start assembly hanging off the stator. You can eliminate the pull-start and rely on the electric start and put a block-off plate but it still ends up wider than a 110 motor.



    Sean :-)
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  20. WILL_S

    WILL_S OUTLAW POSTIE 001

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    :thumb
    CT110X stator pumps out more than the atc 125 ( i have this assembly but it was not going to cut it).
    The only con with the CT is no electric start . Building another for a mate (no dual range)with atc intetnals and will just build a spacer plate for the stator instead turning the crank . I have this setup on the 150cc that runs a stroker atc110 crank , works well and no chance of stuffing up a crank taper .