Topic: bottom end rebuild parts......

[J.Webster Designs]

can someone help me out with a list of parts that need to be replaced in the bottom end when doing a rebuild? I need to know what bearings, seals hard parts, etc... that need to be replaced in the bottom end so i can start gathering them up for a rebuild.


The motor is a 1978 CB750F

Also, if anyone has a lead on a good set of '76 K/F or '77/'78 K cylinders and head that are available, let me know.

[J.Webster Designs]

bump?

[Jerry Rxman Griffin aka MuthaF'er]

You really won't know until you get it apart. You can count on replacing the seals and gaskets anyway. Your crank and rod bearings need to be plasti-gauged for correct sizing.

I have complete lists posted in the CB750/CB750F/technical section for bearings, gaskets, seals, and o-rings for 75/76 750F's. It includes the part numbers. Some will apply to your bike but not all. The bearings are for the ball bearings only - not crank and rod bearing inserts.

http://www.sohc4.net/index.php?q=content/technical

[wannabridin]

justin,

did you like the pictures i sent you of my head?  i might be willing to sell you the cylinders as well.  i don't really think i need two motors, plus it would help finance the current build!

lemme know if you need me to re-send them.  more detailed pics of the cylinders will have to wait a bit, as i don't know if i have them up here on my laptop or not, but i can give you a good deal.

[MattFreeman]

Check Bikebandit for exploded diagrams and part #'s for your entire bike. If it's rubber replace it.

Also check the CB750 rebuild for dummys thread on this site.

Good luck.

I may have a cylinder block if Wanna doesn't.

Like Jerry said, crack the case and go from there.

[J.Webster Designs]

garrett, I forgot you sent me the pictures of your K head. I checked them out and i think i need to pick up something in better shape. I saw that it has one broken exhaust stud tab. i'm looking to get a head that wont cost me more to fix random parts. Thanks for the offer though.

Matt, send me a PM with the cylinder info. do you have a head as well?

[wannabridin]

fair enough, i understand the concern, that's why i bought a 2nd engine for $300 a year ago!  anything else you need?  you going with CR carbs, or some K carbs?  i have a nice set of those that can be for sale, haha!

[J.Webster Designs]

going to be using CR's