Topic: 750 hondamatic question

[rbmgf7]

so i aquired a 77 cb750a frame, engine, and pretty nice 4-2 stock exhaust. however, i noticed the frame tubing has a "hump" right above the valve cover. it appears that it's possible to work on the cylinder head while the engine is still in the frame. is this true? can the engine and misc. driveline parts be swapped into this frame, yet, benefiting the ability to work on the cylinder head with the block still in the bike?

[eldar]

There are so many small changed the A had that none of the other bikes had that it may be possible. The engines are even heavier with the transmission so they may have done that to help with work. Try to pull the valve cover off and let us know. There is a lack of Auto info here so anything we can get would be nice.

[754]

Can you get a pic of those tubes in the valvecover area.. I am interested in modding once and not having to take anything off thre frame to do this.

[eurban]

To the best of my knowledge the automatics with the curved frame tubes do allow for engine work to be done in the frame.  I actually initiated a thread a good while back (when there was alot of discussion about how to correctly mod a 750 frame for engine work accessability) suggesting that those wanting to mod their frames should look at how Honda had actually engineered it themselves.  Didn't drum up much interest at the time.  Here's the link to the thread: http://www.sohc4.us/forums/index.php?topic=21554.0

Also here's the pic that I included in that thread of an auto frame.  I always figured that if I ever build another 750 project that I would start with an auto frame as a basis.  I don't know for a fact if a standard 750 engine would bolt directly into the frame but I figured moding it wouldn't be too hard.  I do know that the auto's gas tank is identical to my 78k ones except for having a fuel guage. . . .

[rbmgf7]

well, actually me and a couple buddies aquired the 750A. it was left at his place for the night. we picked the bike up because my buddy was wanting to do a project with the auto transmission. however, by the time i got to his place today, he had already removed the engine and cracked open the cases. my buddy is a bit impatient when it comes to disassambling. kinda disappointing cause the entire internals looked immaculate. could have reused them. i'm going to salvage a few parts, like the head, piston/crank bearings (i swear these look new), etc.

the frame is still intact and i did walk away with a spare 76K engine from the guy that sold us the 750A. I'll fiddle with this frame and see how well it works with another K engine.

i do have te gas tank that came with the 750A but it doesn't have the gas gauge or a lock. it's straight and pretty clean. i'll just probably ebay the sucker. i tried fitting it to my 78F frame and seat and it's just an inch too short.

[05c50]

According to original Honda shop manual, cylinder head will come off engine without removing engine from the frame.
....Paul