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James' 77 550f.
OneWheelDrive:
Uh-oh, that looks quite catastrophic...
knowsnothing:
....that is a lot of teeth that have been liberated.....how the.....what the.....
luceja:
I was so very much hoping someone would solve the riddle. In the second photo, you can see that there's no retaining plate covering the fork rod (what you can't see is that retaining plate is installed backwards, so it's holding the shift drum in place, but not the fork rod) and that the fork rod has backed out a little... which dropped a fork, which is why there's a whole fork in the oilpan. Most of the transmission, the starter clutch, the primary chain and possibly the crank have to be scrapped.
I discovered this far from home, when first gear got 'stuck' (the bike would move about a foot from stop and then it the rear would lock just like the brake was applied) and second would vanish if I came down from third, but would appear again coming up from first. I should have just stopped the bike and put my thumb out, but there were no strange noises, and all other gears were fine, so I was just trying to get the thing home when I brought it out of second into third and the rear wheel locked up, luckily on a straight. You could hear for that one moment of running as I brought it to a stop how much mayhem was going on in the motor- as if it was full of marbles.
Pulled the motor again and split the cases for the 5th? 6th? time. If it was just the transmission, I could leave the top end intact and swap out the gears, but the primary chain has significant damage so I have to pull the top end apart to get it and the crank out. The crank has some markings on the teeth but I haven't seen any 'damaged' teeth - it doesn't appear any metal got between the crank and the primary, it seems that the distorted primary just took a few laps around the crank and scuffed the teeth. Hopefully... because I have lots of gears and primary chains, but that's my best crank.
I'll just put it straight - this is the kind of think (blowing up the motor twice due to stupid mistakes) that should probably send you packing for a new hobby, but the whole goddamn point of building a bike, to me, is a test of will power. You can just buy a nice bike. To completely rebuild one yourself isn't so easy. I guess the lesson I need to learn is to develop a less rushed mindset... both of these mistakes were from rushing. I knew how that retaining plate was supposed to go (I got it right before). Just need to learn to slow down to a good pace.
jinx2350:
Hey luceja,
I've got a couple of 550 parts bikes here in Portland. 74 and 76. I'd be happy to part with the pair of them or have you come take a look for parts. one is pretty rough...heads are off. The other is so/so, with valve cover off. Both are in frames without tanks or seats or bars. No telling how long they've been sitting, but I'm local and price is flexible. Maybe even willing to trade for help with my own bike one day. Send a PM if you're interested.
luceja:
--- Quote from: jinx2350 on May 09, 2012, 10:51:28 AM ---Hey luceja,
I've got a couple of 550 parts bikes here in Portland. 74 and 76. I'd be happy to part with the pair of them or have you come take a look for parts. one is pretty rough...heads are off. The other is so/so, with valve cover off. Both are in frames without tanks or seats or bars. No telling how long they've been sitting, but I'm local and price is flexible. Maybe even willing to trade for help with my own bike one day. Send a PM if you're interested.
--- End quote ---
Hey,
I'd love to meet up to see how we can help each other or just shoot the crap about bikes. I'll send a PM with my info. Thanks for reaching out!
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