Ok dealing with 85 250es Also have 86 trx250 . Is the 86 250 bottom end compatable with an 85 250es top end? Will the 86 trx250 engine be a direct drop in for the 85 25es?
Got The Holeshot
Arm chair racerJust too addicted
Ok dealing with 85 250es Also have 86 trx250 . Is the 86 250 bottom end compatable with an 85 250es top end? Will the 86 trx250 engine be a direct drop in for the 85 25es?
Trikes: Cagiva 200, 85? Tiger 250,(2)84 200x's , (3)86 200x's, 87 200x, (5)85 350x's, (2)86 350x's, (2)85 250r's, 86 Tecate, (3) 85 250sx's Restoring: 83 200x, 86 250sx. Too many utility trikes to list.
Got The Holeshot
Arm chair racerJust too addicted
exact same thing,some difference in the Bottom,but same top
1986 ATC500X
1985 ATC250SX
1985 ATC200X
1985 ATC250R
1986 ATC250R
1984 ATC250R
1981 ATC70
1984 ATC70
1985 ATC70
Custom built ATC70 / 250R laydwon swap
1986 ATC250SX FATCAT
Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers.
Catch me if you can
Look what the cat dragged in!Originally Posted by atc500x
85 Tri-Zinger 60
85 ATC250SX
86 ATC250SX
87 ATC250SX
02 XR650L conversion
84 ATC 480R
Power User
The day begins with 3WW
I'm pretty sure the wire harness hook ups changed on the atc vs trx engine too. I think the engine output drive shaft is the same. If you use the atc bottom end and trx top end you should be fine I'd think though. If you have the whole trx machine, the swing arm is an "upgrade" item for the atc250sx machine, +3in but requires welding up a new shock mount.
Reply With Quote