Why only tear one bike apart at a time? Why not throw them all together and see what happens? Welp, with a little mismanagement. It's pretty easy to be in that position. It started pretty innocently. Ya see, several years ago, I bought a R100RS with thoughts of rebuild. First I wanted to ride it and see if we geled. I bought it at a fire sale price and started working: rebuilt the forks with new springs, new fork tubes, o-rings and upper triple clamp. Next came the carbs. Complete rebuilds netted several MPG and relaible starting. I lubed the tranny input splines, installed a new rear shock, new tires and started riding. For a bike with 98,000 miles, she was a great winter bike. I did my homework and things seem great. Compression was 138-140, leakdown was about 2-3% and it used about 250cc's of oil per 1000 miles. I also didn't hear any cam chain rattle. I would hear the valves clatter very mildly, but no rattle and the 'S' mark was rock steady while checking timing. The valves didn't move from my initial setting. It shifted great. Everything seemed peachy. Then I started looking for another project. I blew out my knee on the dirt bike and had a week to sit around and shop after having my ACL put back together. Then Farmer Fred posts this beautiful Guzzi cafe bike. I've always loved British cafe bike, especially Tritons with big alloy tanks. However I'm not sure I can turn a British cafe into a reliable summer bike. The Guzzi seems like a good platform for a relaible classic rider. Fast foward one year and I find this 79 1000SP. It's only got 17000 miles, has sat, is covered with oil and dirt, but has good compression, shifts nicely and feels like a solid bike. So with the airhead sorted, or so I thought, I buy another project. I get the Guzzi home and start the disassembly and start hanging around this place. I'm labeling wiring, bagging parts and snapping pictures. Everything is going well. I order up the tank and seat and keep digging into the new project. Once I get the wiring labeled and removed, I dig into the forks: trash! The cartridges lose their fluid with one night on their sides. The tubes have dings and the paint is faded. So what's to do? Strip the paint and start replacing parts. Thanks to Curvy's suggestions, a soft wire wheel chucked into a drill, stuff starts to look shiny. Then I installed the old fork tubes, the clipons and the new headlight. I was getting ready to start mocking up a dash for speedo and tach. Then I heard it. It wasn't subtle. It was distinct rattle. I pulled the airhead into the garage and set up the fans. Listening to the engine revealed the rattle was coming from the front. I pulled out the strobe light and the mark was definitely blurry as compared to earlier. So the plan was to check out the chain, which means I have to pull the exhaust. Seemed simple enough. One nut comes right off. The second one...er...not so much. So now I'm into pulling one head on a bike with 106,000 miles. I might as well pull the second as both push rod tubes weep and I'd like to make it reliable. I might as well have them checked while the bike is down for the summer...it's my winter daily rider. I'm also going to pull the tranny. The rubber boot between the swingarm and tranny is showing signs of rot and the clutch engagement is getting narrow. So pulling the tranny will let me take a look at the clutch. So why this long post? Welp...I've got questions. And as I go along, I'm sure I'll have more. Fortunately/Unfortunately I had my appendix removed Friday morning, so I've had a little time to think about what needs to happen next, but I need help. For you airhead gurus... What else would you check? Rear main seal? Gasket at the oil pump? Universal joint? Drive shaft bearings? One thing that has me concerned is replacing the crank sprocket for the cam chain. I think heating it in oil and cooling the crank with ice makes sense, but can I gently tap it home with a socket and hammer without damaging the crank bearings? For the Guzzi gurus... How the heck do you remove the VIN tag for powder coating? I'll probably send the tranny off to be checked and go through the clutch as it was a bit notchy. I'm sure I'll have more questions. Thanks for any help y'all can provide. I'm looking forward to lots of quality garage time.