Working on my SS440; need help

E

Excitabletom

Member
Joined
Nov 26, 2006
Messages
137
Age
59
Location
Grand Rapids, MI
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,
 
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
 
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.
 
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?
 
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
 
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.
 
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