I have settled in at the new location and have finally got a bit of time to address the GT380. The last post was about the leaks in the fuel tank. I put a liner kit in it. I did take photos and documented the process however in the move I seem to have lost the photos. If I find them I will post them.
Anyway the kit worked well, the tank is fuel tight. The fuel tap has a leak and I must get a kit for it (if possible). When I cleaned the carbys there was a hole in the fuel bowl of the middle carb. I was unable to fix it properly, I made a temporary fix for it. It held fuel but did weep a bit, it was good enough to consider staring the bike.
My info was that the bike hadn't been started since the 1980's, I could be wrong about that. Anyway with the ignition off the engine turned over on the kickstart smoothly. I cleaned the points and sprayed a fairly heavy mix of fuel and oil into the intake ports and turned the engine over a few more times. These engines have roller bearings and as long as they haven't rusted they should be alright with a bit of oil. The engine felt smooth and the compression was ok. I put in a new battery, then put a little premix in the tank. I choked the carbs, turned the ignition on and gave it a kick.
Wonderful !!! It started first kick. It idled for about five seconds then stopped. I tried the kickstart it was locked solid. I didn't try any anything else. I'll pull the engine out and see whats happened. Could be anything. I doubt if it's a catastrophic failure. The engine was only idling at about 800 rpm when it stopped. We were getting ready to move at the time so I haven't touched the bike till now.
One thing I did do was to set up an ebay watch for a bowl for the carby. I also contacted Mikuni and many other retailers and specialists to get a bowl. No luck at all, seems the 28mm Mikunis on that are not even known to exist nowadays. Then I came across a set of three from the same model. They were being sold by a wrecker in Ireland. I only needed the bowl but he wouldn't break up the set, so I unwillingly bought all three for almost $150.00. They arrived a few weeks ago and so I began to pull them apart. I thought I would keep the bowl and restore the rest and on sell them again.
I don't know if that is possible. Externally they didn't look too bad, when I began to dismantle them.....yuck and double yuck. The slides were stuck, which I expected. When I removed the bowls, disaster. They were full of a white crystalline substance. I have seen similar stuff on the inside of carbys before but nothing like this. They are almost full of this crap. I don't know if it's a by product of the breakdown of the aluminium or something else, but it's extremely hard to remove. See Below.
Here a a couple more photos of the stuff.
I'm going to pull the engine out in the next week or so to see what has stopped inside it. I'll post the process.