The early death of Scrappy found and other mysteries.

[nlovern]

Hi everyone,
Nathan here.Ive gotten scrappy tore down and I pulled the cam shaft off the right side to make it easier to get the motor out of the frame,when I took the valve cover off half a rocker arm fell out.
Guess that's what killed the motor at just 24,000 miles. maybe over reeved ??? piston n valve meet and they didn't like each other.
Only problems im having as I start the redoing of scrappy is the wheel cylinder is froze up bed. I soaked in vinegar and wire brushed it for days and finally gotten the end off but the piston isn't moving.
I've noticed being a 1980 model the 1100 has the single piston caliper. Don't see that they would stop the big bike as good as the 2 piston calipers. Will the 2 piston calipers fit on a 1980 1100?
And I have no way to get the piston out of the caliper either no way to pump it out. Any ideas?
Ive seen lots of 1980 Honda rear master cylinders on ebay new for $15 but they bolt on straight up n down on the frame not like the gl1100.
its a long slow road. Sigh. its cold here now anyway. -2 this morning and 8in snow.
Well gotta get off here. Thanks for this wonderful sight and all the help.
Nathan Lovern,Va
85 GL1200
80 GL1100

[tom84std]

Eight valves and it fails to work with the loss of only one?

[nlovern]

The motor is stuck. all plugs were out. I haven't taken the head off yet. may do that. I have another motor to put on it. Scrappy was siting outside for over 20 years I think.

[tom84std]

No, seriously I was joking. I will admit that if one valve fails, it should continue to run, but poorly. True story, I bought a 79 many years ago. It was my first wing. I rode it some, but it was obvious something was wrong. Long story short, it had been stored with fuel inside for years. One or two carbs were barely functioning. It was a two cylinder Goldwing. I ran a heavy dose of carb cleaner through. It took a while but finally all worked out. THEN I found all the valves to be very poorly sealing. I lapped them all with compound and restored my compression. What I suspect is that there was so much gunk that when I flushed out the carbs, all that crap ended up on the valves. There was a lot of carbon and crud built up all over the insides of the heads. I used Berryman's Chemdip to soak the valves and heads overnight. Everything just melted off the heads and valves. I don't know if Chemdip is as effective as it was then (about 2001) but it sure worked well back then.
Your story is an interesting one for me. I've taken a number of old abandoned or neglected machines and vehicles and brought them back to life over the years. Cars and motorcycles. A passion for me and it keeps me outta trouble. Keep posting your progress. I'm thinking if you're determined enough you'll end up with a wonderful machine and you'll know it intimately.

[nlovern]

Im the same way I love fixing up old bikes people throw away. Im on facebook I got pics of scrappy there.

[WingAdmin]

Hi everyone,
Nathan here.Ive gotten scrappy tore down and I pulled the cam shaft off the right side to make it easier to get the motor out of the frame,when I took the valve cover off half a rocker arm fell out.
Guess that's what killed the motor at just 24,000 miles. maybe over reeved ??? piston n valve meet and they didn't like each other.

Only thing I can think of that would snap a rocker arm like that is a broken timing belt. Even if it was over-revved, where the valve spring couldn't close the valve fast enough, if the piston contacted the valve, it would just push it closed, because the cam lobe driving the rocker arm would have already passed by.

Either that, or metal fatigue from a manufacturing defect in the steel used to make the rocker arm. But that's stretching.

Only way to get huge pressure applied to the rocker arm is to have the piston hit the valve, which nails the rocker arm, when the cam lobe is still trying to push the valve open - and the only way for this to happen is for a timing belt to break (or be installed incorrectly).

[deanbw]

You can use a pipe extractor to get the piston out, sears or a good tool supply. I have used these with no damage to the piston at all, you just need to find one the right size.

[urbanmadness]

Do you have an update?