Thanks guys, cleaning up the smaller bits, I forgot about the horn bracket: I took this completely apart 10 yrs ago & dug out a pan of  black parts  that  got messed up sitting! I just ordered an ultrasonic cleaner to try & might try a homemade plating for the hardware? I read somebody did it…I think Terry from Australia iirc was very successful:) aI have an old plastic cooler & a battery charger!

  I don’t understand, I have AAAAA on case & AABBA on crankshaft… Thanks for any input:)

Hi guys! I joined this forum  10 yrs ago when I got & disassembled my 33xxx ko, then I got busy with my family & it went to the back burner lol.
Now I’d like to reassemble but torn between trying to keep it original or not? Should I spray paint frame, have it painted or just leave it as is?? I also disassembled engine & cleaned & washed cases & will be resealing stock engine. Build date is 4/70 with 9k or so on it & last registered in the early 80’s. Has the 4 into 1 carb cables etc. I rushed the disassembly & cracked up the pained air box:( which needs to be glued up somehow still. I worked for a master builder of these back in the early 70’s  who specialized in street racers at the time. Those were some good times!

Thanks Mark, appreciate it! 

 I've got a 70 KO (33xxx iirc) I tore it down to freshen up, had very low miles. I'd like to get a complete gasket & seals kit and possibly new bearings..? I worked for a guy who use to repair and build these all the time back in the early 70's...those were the days! haha anyways, I know there's just a couple "good" places now:( Like Vesrah http://4into1.com/vesrah-complete-gasket-set-vg-156-honda-cb750-1970-1973/]http://4into1.com/vesrah-complete-gasket-set-vg-156-honda-cb750-1970-1973/]http://4into1.com/vesrah-complete-gasket-set-vg-156-honda-cb750-1970-1973/  and cb750...http://www.cb750supply.com/products/4/engine  not sure but want good or maybe the best? TIA for your opinions:)

I got it, thanks for the interesting tip though..

More on the output shaft. Evidently "in 1972 Honda issued a dealer change order on existing inventory and then changed the parts (Bearing and shaft) because of bearing failure and then added a chain guide so if disaster struck, the chain would feed out the bottom of the sprocket without punching a hole in the engine case. The old bearing was a 6305 and was changed to 5206 double row radial ball bearing." Of course back then were different times and alot of folks rode 'em much harder than a vintage collector would these days. That being said, it might just be that that was a strong contributing factor of the failure? I don't know as of yet but Honda proactively stepped up with a design change undoubtedly either to fend off negative product image and/or the cost of warranty repairs. 

Now that I got an old 750, I got in touch with my ole friend who I worked with/for back in the early 70's fixing motorcycles. He was well known in the area for his expertise and specialized building street race engines in particuliar (he was a certified Honda tech too). These first models had the skinny bearings that would fail/seize causing shaft breakage...which would also usually take out the rear case halves too.. Honda developed a dbl. roller bearing which corrected this problem and since the bearing width is greatly increased, sunseqently the collar/shaft is wider too and best to replace both at the same time. In fact when I contacted him on this early 750, that was one of the first things he reminded me to do"Replace that output shaft and bushing"! LOL!
I was just thinking...Prolly more so if you get on it and/or holeshots maybe? iirc he said the bearing gets dry and/or it seizes...