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Thread: Yamaha TRI-Z single rear wheel

  1. #1
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Yamaha TRI-Z single rear wheel

    Here is a view of the complete bike, I dont have a rear fender for this ( any one have one they would like to ship to UK ? ) . After taking the swingarm off the bike it looks to be a home made set up However i have seen pro built kit for sale in England that also had a pro fabricated rear fender. At the time i couldnt afford it , and it was only 20 min drive from my house
    Attached Thumbnails Attached Thumbnails Image016.jpg  
    Last edited by luke; 12-03-2007 at 03:08 PM.
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  2. #2
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Close up of each side of the swing arm. It has a small 3mm plate on the right holding the caliper in place over the disc, the disc is bolted to the hub in the original location.
    Pictures also show th swing arm conversion, showing the strengthening work. The plate steel used looks to be over 5mm but it's hard to tell with all the edges welded up. It's substansial though ! However the way it has been made is very simple and could be coppied.
    Attached Thumbnails Attached Thumbnails 71.jpg   74.jpg   75.jpg   76.jpg   77.jpg   78.jpg  

    Last edited by luke; 12-03-2007 at 03:09 PM.
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  3. #3
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    conesus lake NY
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    how does that sprocket hook up?

  4. #4
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Sorry for the delay , i'm having to resize all the pictures as i go.
    Here is a close up or the complete set up, with the wheel in place.
    Attached Thumbnails Attached Thumbnails 79.jpg   81.jpg  
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  5. #5
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Scunthorpe, England
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    The wheel will run almost in line with the engine sprocket, these show how much offset i put on it to get the chain straight. This was done by eye. The shims and long (tube) spacers i used came from the local tractor dealer. I cut them to length myself, it was a bit of trial and error as these parts did not come with the kit when i bought it.
    Attached Thumbnails Attached Thumbnails 83.jpg   84.jpg  
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  6. #6
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    This is the extended hub, The new part is alloy, milled to size and shape. It looks to have been completed before being welded on, as the weld has clearly not been milled. However i suspect it was a blank and centered and drilled out for the bearing after it was welded on. It also looks like the sprocket has been riped off on more than one ocasion, as there are 8 extra (damaged) holes in the end behind this sprocket. It has been well made though and up close looks to have been better made than the swingarm If these could be made at the right price i would think these kit's would be easily made , ther isn't much to extending this swingarm. There was no sprocket with the parts when i got them, so i went to my local bike shop with the hub and bought one to size. What you cant see very well in the bicture is the small lip the sprocket sit's on to locat it. I put a 47 tooth on it as it was a good match to the bolt hole's and the lip on the side of the hub.
    Attached Thumbnails Attached Thumbnails 91.jpg   87.jpg   88.jpg  
    Last edited by luke; 12-03-2007 at 06:25 PM.
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  7. #7
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Finally, the extended side has an oversize bearing (altough the original bearing will still fit deep inside) The new bearing still fits on the axle the same size but is 52mm outside.
    Attached Thumbnails Attached Thumbnails 90.jpg  
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  8. #8
    Join Date
    Nov 2006
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    southern oregon
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    So the rear tire is not inline with the frame?
    2-stroke lover

  9. #9
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Not quite, it's out by about 9mm. It looks more in the pictures.
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  10. #10
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    Chester U.K
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    thats a ride & i like it, can you do anything to pull the wheel over to centre?
    Tri-Z 600 streetfighter

  11. #11
    luke's Avatar
    luke is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Quote Originally Posted by tri dee View Post
    thats a ride & i like it, can you do anything to pull the wheel over to centre?
    It will go to DED center but the chain run's on the p1ss between the sprocket's However, it's only out a little and at a glance you cant see it. I set the spacer tubes on each side to run the chain true ( with the wheel just off ) . Didnt i buy a crank from you recently on Ebay ???
    198? Manco Quester 300
    1983 KLT 200
    1984 Tri-Zinger 60
    1985 ATC 70
    1985 TRI-Z
    1985 TRI-Z (two Wheel)
    1985 ATC 250R
    1985.5 TRI-Z
    1986 TRI-Z (quad)
    1986 Tecate
    1987 Malaguti Ranocchio 50
    2001 YZ 250

  12. #12
    Join Date
    Nov 2006
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    Quote Originally Posted by luke View Post
    However, it's only out a little and at a glance you cant see it.
    Is it noticable while riding? It seems like it would turn funny like that..
    2-stroke lover

  13. #13
    250rfan's Avatar
    250rfan is offline Sickest custom 450R ever. Arm chair racerJust too addicted
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    Tri z

    Quote Originally Posted by luke View Post
    It will go to DED center but the chain run's on the p1ss between the sprocket's However, it's only out a little and at a glance you cant see it. I set the spacer tubes on each side to run the chain true ( with the wheel just off ) . Didnt i buy a crank from you recently on Ebay ???

    Luke,
    Am i right in thinking, in order to line up the 2 sprockets perfectly, you would either have to

    1 - make the rear wheel THINNER.

    2 - Extended the front sprocket outward - 9mm to 10mm

    Cutting and re welding the rim might be a hassle but i have seen it done.

    You could get a special front sprocket made which would sit out further from the engine casing, this would allow you to put the rear wheel back into a central position.

    I cant remember how much clearance there is between the top of the chain and the inside of the frame around the front sprocket area, but you may be able to steal a few millimeters or so, possibly you may have to re figure mounting the sprocket guard if you wanted to run one.

    Cool piece tho, and in the UK , am sure if you can engineer a solution to this, well done.

    G.



    1986 ATC 70
    1985 ATC 250R - Hondaline Special
    1985 ATC 250R - Flat Track 'Privateer'
    1985 ATC 250R - HRC 450RR.
    1986 ATC 250R - HRC Flat Track.
    1998 Honda Laegers TRX 250R (CT 350 PV) N/F cr500 link.
    1998 Honda Laegers TRX 250R (Sparks 330) N/F cr500 link.
    1999 Honda Laegers TRX 250R (Sparks 330) N/F cr500 link.
    2016 Yamaha Laeger's Banshee YFZ 350 (DRI 350) N/F cr500 link.

  14. #14
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    How much clearance is between the chain and the tire? If there is adequate clearance some material could be removed from the face of the spocket flange on a lathe...
    2-stroke lover

  15. #15
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    An easy way to bump the front sprocket out some would be to drill some holes in 2 different sprockets and bolt them together with some sort of spacer in between.
    I'm back in the USSR...

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