Topic: CB750K7 Airbrushed, 70s aftermarket goodies and some engine questions

[onepieceatatime]

You can use almost any year lower end contents to get the parts you need, so you may get a cheap motor that has fin or case damage...usually cheaper.
 I would be leery about the ball bearings in that transmission  unless still covered in oil.
 Are the metal shavings steel or aluminum  ?

It was aluminum in the oil pan.
I wonder if getting an earlier engine just for the crank and rods would be worth the cost, that would require new crank bearings too, correct?
I was also concerned about the condition of the transmission bearings. They look ok, but if I do try to save this engine, they will be replaced as well.

Sent from my Pixel 4 XL using Tapatalk

[Stev-o]

You can use almost any year lower end contents to get the parts you need, so you may get a cheap motor that has fin or case damage...usually cheaper.
 I would be leery about the ball bearings in that transmission  unless still covered in oil.
 Are the metal shavings steel or aluminum  ?

I wonder if getting an earlier engine just for the crank and rods...

When I blew up the engine on my K4  [Big Bang Bike] I bought an entire lower end for $100 and used that to build my motor back up.

Bought 836 pistons and jug [from Bill B] and was able to reuse my head. Runs like a dream...