At The Back Of The Pack
Arm chair racerAt the back of the pack
recently bought an 85 125m. having an issue with it:
when going down a hill and engine braking, it starts smoking when I accelerate again. it only smokes for about 3 seconds or so.
what would the most likely could the cause of this be?
can those lifan top ends bolt on to these motors? they seem to be good quality and well priced.
regards
Last edited by burnoutboy; 12-30-2007 at 02:56 AM.
wanted.. 84 atc70 fuel tank
Got The Holeshot
Arm chair racerJust too addicted
I had the same thing happen on my old 85 125M. Im guessing the oil would rush to the top end finding a way into the cylinder. Mine would sometimes seize when on a really steep decline. It was hell to start and when it did, smoke everywhere for a few seconds. Funny, there was little to no smoke during normal riding.
84 Honda 200ES Big Red
At The Back Of The Pack
Arm chair racerAt the back of the pack
do these things have a automatic decompressor? theres not alot of compression when i yank the pullcord.
do you know anything about those lifan topends?
wanted.. 84 atc70 fuel tank
At The Back Of The Pack
Arm chair racerAt the back of the pack
and my one doesent smoke at all exept for when engine braking down a decline.
i liked your wheelie vids on youtube haha.
wanted.. 84 atc70 fuel tank
Power User
Got the holeshot
Time for a new set of rings.
Tionesta Trikes ATC 450R
86 250R
86 Tecate-3
83 ATC 70
85 Big Red
81 KLT 200
85 250SX
Tricky Dicks Cagiva WMX 200 sold
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Power User
Got the holeshot
what color of smoke? is it realy cold out when it does it?
At The Back Of The Pack
Arm chair racerAt the back of the pack
blue... nope just normal hot sunny day. definatley need a top end. now im just trying to see if i can use a whole lifan top end.
wanted.. 84 atc70 fuel tank
At The Back Of The Pack
Arm chair racerFirst time rider
Sounds like an oil ring to me. When you engine brake, there is less compression against the rings which could allow that small amount of oil into the cylinder.
Not sure if these have the decompression or not.
Another off that wall idea...didn't accidentally put 2 stroke gas in it did ya? lol
-Phil
Power User
The day begins with 3WW
Do a compression check before you go to extremes.............
My feedback: http://www.3wheelerworld.com/showthr...k-for-ATC-Eric
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Power User
Got the holeshot
it would be cheaper to slap in a new topend kit.
Power User
Roostin Away
I would put a new set of rings In. It's about the only reason you will get blue smoke on deceleration. Oil In the cylinder at the time a compression check Is done will SOMETIMES give a false reading because the oil works as a sealer for the rings.
83 ATC 60-R Cr60 converted with Zinger parts.
83 ATC 70.
83 Tri zinger
ATC 85-R Cr85 engine on shortened 86-R frame.
ATC450AF
86 310-R Drag racer
440 snowmobile powered custom built.
87 Cr 500 Converted to Drag racer
At The Back Of The Pack
Arm chair racerFirst time rider
if its the 110 style motor, they only have one valve seal on the exhaust side, so they will smoke quite a bit no matter what. do a compression test, she might be clapped out.
Power User
Got the holeshot
My turd warrior did this , and all it needed was rings...
At The Back Of The Pack
Arm chair racerFirst time rider
My 110 did this and got to the point it would smoke all of the time. I just put a new top end into it.
-1983 Honda ATC110-
Brand new topend using. Performance cam and some porting/polishing.
Should be good for another 24 years now!
-1991 KTM 540-
Piston turned into grenade inside motor
-1996 KTM 550-
Midway through COMPLETE rebuild
-1997 Honda Cr80-
Spun crank bearing on trans side
At The Back Of The Pack
Arm chair racerAt the back of the pack
Yeah there is bugger all compression there,,very easy to turn over. really want to do the whole top end while i got it apart...those lifan topends are cheap enough.
My main question now is will the Lifan topend bolt onto my motor??
thanks for the help everyone much appreciated
Last edited by burnoutboy; 12-30-2007 at 02:57 AM.
wanted.. 84 atc70 fuel tank
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