On my atc90 project it leaks oil from what lloks to be where the drive sprocket goes into the engine. What is rong with it? Is the seal gone? Would a new complete engine gasket kit solve the problem?
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On my atc90 project it leaks oil from what lloks to be where the drive sprocket goes into the engine. What is rong with it? Is the seal gone? Would a new complete engine gasket kit solve the problem?
Got The Holeshot
Arm chair racerJust too addicted
Does the oil only come out of there when it is running? Mine comes out behind the front sprocket when it is running but it dosent when it's not running. I don't know if this is like a oil slinger type thing to lube the chain or if my engine is just messed up.
First Time Rider
Arm chair racerNew to the board
Most probably you have had a chain come off in the past and punched a hole in the crankcase, very common problem with atc90s, well. used to be common when ATC90s were all you could buy, it happened to a couple of mine. you have to split the engine, thats a big job, get the left side case welded back up, reface the casing and reasemble the whole lot. might be a good to for a full rebuild.
But then again, could just be a leaky seal. I've got my money on the busted case but for you sake I hope its just a seal.
At The Back Of The Pack
Arm chair racerAt the back of the pack
I'm pretty sure you can pop the old seal out and rub a light coat of oil on the new one and pop it in from the outside of the motor, just take the countershaft sprocket off. I would attempt this first being that it will only cost a couple of buck's for a new seal probably. It's worth a shot.
1985 Honda ATC 250 Big Red
"Ugly Betty" from the handlebars back it's a
1982 Honda ATC200es, from the handlebars
forward it's a 1988 Honda TRX 300 Fourtrax.
"If you wanna play, you gotta pay..."
Power User
The day begins with 3WW
you cant take the countershaft sproket off unless you take the hi-low selector off and and take the left side case offOriginally Posted by atczack
1985 Tri-Z-
Power User
Lord of the trike
Clean up all around the output shaft and see where it is coming from. Chances are the seal is worn out. You can remove the front sprocket and pull out the seal and put in a new one fairly easily. Oil seals do not come in gasket kits, you would have to get a single seal from your honda dealer or find a seal kit (im not sure if there is one for the atc 90).
1984 Yamaha YT 60 Tri Zinger(current project)
1983 Yamaha YTM 200 (rear suspension kit)..... long term project
2004 BMW R1150R
1972 Honda CT 70
2007 Lifan 110
At The Back Of The Pack
Arm chair racerAt the back of the pack
Daaaaanggg!!! Sorry about the misinformation, is there any other model's like that?
1985 Honda ATC 250 Big Red
"Ugly Betty" from the handlebars back it's a
1982 Honda ATC200es, from the handlebars
forward it's a 1988 Honda TRX 300 Fourtrax.
"If you wanna play, you gotta pay..."
At The Back Of The Pack
Arm chair racerAt the back of the pack
Ya my chain saw does thet too.lol
First Time Rider
Arm chair racerNew to the board
seal on the sub transmission side is 91202-053-000 (31x43x8), seal on the engine side is 91201-053-000 (27x37x7).
You will need a flywheel puller as the flywheel has to come off along with the sub-transmission to allow the outer casing to be removed to gain access to that seal, be carefull not to damage the output shaft or the casing when removing and replacing the seal.
Hope it cures your problem (but I got me doubts!)
Putting Priorities in Order, Busier than ever.
Catch me if you can
I have been working on these machines for well over 16 years and I have seen a lot of oil leaks ( like has been mentioned above ) on atc90, atc110, and atc125m's. I can only remember a couple that were from the seal being bad. So speaking from experiance I will put my money on a broken case also. To fix it correctly you will need to have the case welded and machined. To have someone else do this for you can be costly. When i run into this problem I just swap the bottomend out with a good one ( I have a lot of these motors ).
I know of one atc90 motor that you could just pop the seal out and replace it ( see attatched pictures ). But then this 1974 atc90 motor ( actually the whole machine ) has been heavily modified. What is it and Where did I get it? I won't say right now ( I am waiting on some things to get here ).
Howdy
At The Back Of The Pack
Arm chair racerAt the back of the pack
Ive got one of those 90 motors without the hi-lo range. You arent that special. I use it in the aluminium frame 70 that i posted pictures of around a week ago.
Power User
The day begins with 3WW
ohhhh Howdys got a new toy!!! i want one
1985 Tri-Z-
Always finding new and exciting ways to not give a hoot in hell
Catch me if you can
HaggLE, No offense, but I know what that motor goes to and I really doubt you have a trike as special as itYou will have to hang around to see it, but I can assure you, you wont be dissapointed.
At The Back Of The Pack
Arm chair racerAt the back of the pack
I never said that it wasnt special, i said that he wasnt that special because i have one as well.HaggLE, No offense, but I know what that motor goes to and I really doubt you have a trike as special as it
The antisipation is killing me, can you tell us a bit more about this trike?
Always finding new and exciting ways to not give a hoot in hell
Catch me if you can
lol, I wish it were my place to. I will say however, that it is VERY special
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