what motors will fit into an atc 90 frame? i have a 1976 90 im trying to fix up. just wondering what pit bike motors or other engines will bolt into it? thanks.
At The Back Of The Pack
Arm chair racerAt the back of the pack
what motors will fit into an atc 90 frame? i have a 1976 90 im trying to fix up. just wondering what pit bike motors or other engines will bolt into it? thanks.
Power User
The day begins with 3WW
The only engines that will bolt in, are the atc90 and the atc110. Other engines will not fit without modification or other parts to bolt into place. Pit bike engines are based off the honda 50cc/ atc70 engine, which is smaller than the atc90/110. With enough modification, you can even make atc 200x engines fit into an atc90/110 frame. But that's really alot of modifications.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90
Power User
Roostin Away
Veal what about a 125 motor, thought they were relatively the same as the 110 or do they only match up to the later model 110's?
Power User
The day begins with 3WW
I don't know this for a fact, but I don't think the 125 will work due to the electric starter.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90
Roostin' Away
Arm chair racerRoostin Away
well, if you use the electrics and wiring to use the starter on the 125 you should be able to swap. 90/110/125 are basicly all the same really (not counting the 86-87's). starter shouldn't be an issue as far as mounting the motor.
74 HONDA ATC 70
85 HONDA 125M (undergoing surgery)
85 YAMAHA YT60 red w/yellow trim (sold, still in the family)
"What the f*** are you doing Bill? The racetrack is no place for snacks and fancy cakes....
I'll have a Custard Cream if your asking."
Originally Posted by swampthang
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At The Back Of The Pack
Arm chair racerFirst time rider
DrATV sells an adapter that should allow a modern chinese or genuine 50/70 based motor to drop in, although you'd have to devise a head mount for frame strength
84 ATC 70 w/88 (for the kids)
85 Yamaha YTM200 (Protek suspension / Tecate forks)
74 Joker frame ATC 90 w/ 110 cdi
71 Honda Z50AK1 Mini Trail w/117cc stroker
CRF50 stunter w/117cc stroker
08 Yamaha WR250X
My feedback:
http://www.3wheelerworld.com/showthr...89#post1080789
The purveyor of "Plan B"
Teaching quads a lesson
Pretty sure the 125 engine will work, I think the electric starter is on the bottom of the engine.
"Yes its broken, but does that really surprise you?."
"What happened? What does it look like happened?!?!"
Roostin' Away
Arm chair racerRoostin Away
yeah, starter is on the bottom and you'd have to figure out where to put the other elec stuff for it. don't know if it will help you any really but here's a couple half-naked pics of my 125.
rightside, starter is right under the cylinder and you can see how tight the carb and top valve cover are to the tank and frame.
leftside, electricals are under the black cover on top of the frame above the muffler
74 HONDA ATC 70
85 HONDA 125M (undergoing surgery)
85 YAMAHA YT60 red w/yellow trim (sold, still in the family)
"What the f*** are you doing Bill? The racetrack is no place for snacks and fancy cakes....
I'll have a Custard Cream if your asking."
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