Excitabletom
Member
I bought a 1980 SS440 for vintage rides; I need to do some work and this is my first time doing some of this.
The PTO piston has a small chunk missing. It looks like the piece bounced all around destroying the piston and head, but the cylinder walls are still smooth.
Any ideas what causes a chunk of piston (on the top edge, half the size of a dime) to break free?
The intake manifold has 4 bolts per side; I can only reach three on each. How the heck to to get the lower, center bolts on each side?
Finally, the motor has a Yamaha 102C clutch on it; What puller pops this clutch off? My buddy has a YPZ puller, but he says I need a 102 puller? Is this right?
Thank you,
The PTO piston has a small chunk missing. It looks like the piece bounced all around destroying the piston and head, but the cylinder walls are still smooth.
Any ideas what causes a chunk of piston (on the top edge, half the size of a dime) to break free?
The intake manifold has 4 bolts per side; I can only reach three on each. How the heck to to get the lower, center bolts on each side?
Finally, the motor has a Yamaha 102C clutch on it; What puller pops this clutch off? My buddy has a YPZ puller, but he says I need a 102 puller? Is this right?
Thank you,
bluemonster1
LIFE MEMBER ONLY ONCE!!!
maybe a ring issue,broke or spun in the cylinder and took out a piece of the piston.
Yeah some of them older sleds can give you problems when removing things,weren't well thought of as now.Poat a pic of it and maybe some ideas will come your way on here
Yeah some of them older sleds can give you problems when removing things,weren't well thought of as now.Poat a pic of it and maybe some ideas will come your way on here
farmboy4240
Member
I think the way i had to get those bolts in the manifold off was to use a quarter inch drive deep well 10mm socket a short extention a knuckle/swivel and a ratchet. And you must have the carb removed.
YAMMIEGOD3:16
Active member
AND DON,T EVEN TRY USEING THAT PULLER ON A 102 c. you need the right puller for that comet. 3:16 (yammie tony)
Excitabletom
Member
Farmboy, you are right! I was using a 3/8 and couldn't fit it. Switched to 1/4 and got the intake off no problem!
Now that it's apart, I'm thinking it was a broken ring that caused the damage. Does this make sense? Do they break for no apparent reason and cause this type of damage?
Next question: I have the top end torn down, but the bad piston is still attached to the connecting rod. I took out one circlip, but the pin didn't slide out and I didn't want to force it. How do I remove the piston pin?
Now that it's apart, I'm thinking it was a broken ring that caused the damage. Does this make sense? Do they break for no apparent reason and cause this type of damage?
Next question: I have the top end torn down, but the bad piston is still attached to the connecting rod. I took out one circlip, but the pin didn't slide out and I didn't want to force it. How do I remove the piston pin?
bluemonster1
LIFE MEMBER ONLY ONCE!!!
just pulled my pins the other day,one was loose enough but others not.Got a socket same diameter as pin to place up against one end,used a larger cylinder pipe which diameter inside is larger then the pin.Then I used a carpenters rachet clamp and squeezed it out slowly.You might need 3 hands only,but did with two..lol
Gorkon
New member
Not to say for sure that is the culprit, but I have seen lean condition cause the piston problem you mention.
Sled sit, carbs get gummed, guy takes it for a ride with no maintenance and pins it trying to clean it out, but jet is gummed causing aforementioned lean condition and either melts a hole, or if not that bad and ridden for a time will cause piston failure. I can't count all of the old girls I have seen this on! Good luck. G.
Sled sit, carbs get gummed, guy takes it for a ride with no maintenance and pins it trying to clean it out, but jet is gummed causing aforementioned lean condition and either melts a hole, or if not that bad and ridden for a time will cause piston failure. I can't count all of the old girls I have seen this on! Good luck. G.