//ArrowChat Code
Results 1 to 9 of 9

Thread: Question for the 90 guys.

  1. #1
    gimmeamidget is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2014
    Location
    utah
    --
    434

    Question for the 90 guys.

    Click image for larger version. 

Name:	image.jpeg 
Views:	33 
Size:	268.1 KB 
ID:	244942Click image for larger version. 

Name:	image.jpeg 
Views:	42 
Size:	305.3 KB 
ID:	244943Click image for larger version. 

Name:	image.jpeg 
Views:	31 
Size:	239.4 KB 
ID:	244944Click image for larger version. 

Name:	image.jpeg 
Views:	30 
Size:	290.5 KB 
ID:	244945Click image for larger version. 

Name:	image.jpeg 
Views:	33 
Size:	244.1 KB 
ID:	244946Picked up a parts machine tonight. Guy said it has a 110 cylinder and a manual clutch? Question is I always thought a 110 was too long to fit in mount without modifying. This is a US90 frame so the front mount does not come off. Also is it possible to convert the auto clutch to a manual? It feels like a clutch when I squeeze the lever. Finally will a standard 110 carb and intake clear or should I be on the lookout for one of those strange bend intakes? Any help is appreciated.

  2. #2
    Join Date
    Jun 2013
    Location
    Oceanside, CA.
    --
    610
    The cylinder is a 90, casting bosses to allow early style foot peg bolts. The main difference between 90 or 110 cylinder is there @ 1/4 inch longer and used a single bolt head stay plate. Plates can be swapped easy enough. Now as for the clutch, that's some red neck engineering, would be interesting as how its connected inside the auto clutch cover. I think the carb set up is just a bolt on.

    "HJ" Click image for larger version. 

Name:	oldfogey.jpg 
Views:	65 
Size:	1.2 KB 
ID:	244963
    ’84 YT60
    ’85 350x (423cc) with ’81 XL500 head conversion
    ’83 XR500 (628cc) converted 3 Wheel hybrid
    ’73 CB750 K3 converted 3 Wheel hybrid
    ’86 TRX250R chassis XR650L engine hybrid
    ’89 TRX250R (stock )
    ’90 LT500 Quadzilla
    ’85 FL350 Odysses ( water cooled head )
    Lost (sold) but not forgotten ’80 ATC 110 (205cc on alcohol ) ’83 200x ( 222cc ) ’83 200x ( 185s eng ) ’85 350x ( stock )
    added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange

  3. #3
    gimmeamidget is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2014
    Location
    utah
    --
    434
    Ok I will go ahead and throw a 90 carb on it and see if it will run and see what the clutch is all about. I grabbed it for the front tire and rust free tank. It has the early rear axle with a set of converters to use later wheels. Looks like he used 2 tubes of jb weld where the clutch cable enters the case and it uses the right brake lever which will prove a challenge to try and remember which is clutch and which is brake. I think I will swap clutch to the left and brake to the right. The old guy swore he had a bigger bore cylinder he said he couldn't remember if it was a 110 or 125. Is it possible he just bored out the 90 cylinder and used a 110 piston?

  4. #4
    Join Date
    May 2013
    Location
    Brownsville, Tn.
    --
    1,271
    Yeah that clutch appears to be smoke and mirrors. Would be interesting to see what is behind the cover.
    As Hairy stated definitely a 90 cylinder as far as putting a 110 piston in it you could not do that because of the 90 having a 14mm piston pin and the 110 having a 15mm.
    Most in likely just over bored from stock. The 90 or 110 carb set up would just bolt on and go.
    Cool looking bike though.
    * 1978 ATC 90/180 Pauter PJ1 / Springer "Team BAPP" Bike *

    * 1980 ATC 110/180 "Danny's Machine Works" 3D Sprint Dune Bike *

    * Nicholson 500 Race Bike *

    * HPATC Yamaha RD350 "Big Moe" Trike *

  5. #5
    gimmeamidget is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2014
    Location
    utah
    --
    434
    Put a carb on this morning and fired it up and that goofy cable going into the case is working as a manual clutch. When pulled in I can rev in gear and no movement. As I let it out clutch engages. One day when I have more time il pop the cover and see what's rigged up inside. Almost afraid to look.

  6. #6
    Join Date
    Jul 2009
    Location
    South Florida
    --
    6,722
    Wow look at that fancy manual clutch lol . Cool bike , congrats on scoring it
    78 atc 90/180cc Dickson Full Suspension
    76 ATC90/180cc Nicholson
    77 atc 90 Dickson Full Suspension
    84 KLT 110/123cc Powroll Racer from 80s
    87 atc 125m stock
    84 atc 200x Curtis Sparks
    84 atc 200x Powroll My race bike from 80's
    83 atc70/108cc Powroll blue Xmas Special
    81 atc185s HP-ATC full suspension

    Performance Shop is Open PM me for Service

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  7. #7
    Join Date
    Jul 2021
    Location
    Edgewood, WA
    --
    26
    I would think the previous owner would have just looked around for a CL or S90 and swap cases and such... interesting.
    I may be old, but I still enjoy the feeling
    of the earth rotating beneath my wheels

  8. #8
    Join Date
    Jul 2010
    Location
    Arkansas
    --
    2,196
    It's now 2022 and we still haven't seen what's behind that cover.


    Failed suspense turned into a zombie post.
    The story of three wheels and a man...

  9. #9
    Join Date
    Jul 2021
    Location
    Edgewood, WA
    --
    26
    Haha, yep. I still can never resist rattling an old post to see what's inside if it interests me.
    I may be old, but I still enjoy the feeling
    of the earth rotating beneath my wheels

//ArrowChat Integreation Code //