wanted , engine cases our complete engine

[Lachopperproject]

Does anyone know where i can get a set of engine cases, or a complete engine. Doesn't have to be in running condition.
I plan on a total rebuild anyway. I would like to find between years 71 to 78. Any info would be great.
Thanks

[Lucky 1]

The 1977-1978 was the best of all. About 21 total improvements.
The carbs were not very good.
If you can get some 1969 carbs, they were the best to work on and weighed much less.
They had the most power too,  the EPA messed it all up.

[motogrady]

deadstar has 8 bikes, parts and motors in the for sale section

[shinyribs]

Lucky 1 wrote

The 1977-1978 was the best of all. About 21 total improvements.

Well,kinda. The '77 & '78 F models (black engines) had a pretty aggressive cam profile that apparently wears out valve guides much faster then the other models.

Lucky 1 wrote

The carbs [ *on '77 & '78 models ] were not very good.

That's a matter of opinion. The ''keyhole'' carburetors on those bikes had an accelerator pump feature the previous ''roundtop'' carburetors didn't have. It's actually a nice feature for improved cold starting and throttle response.

Lucky 1 wrote

If you can get some 1969 carbs, they were the best to work on and weighed much less.

I agree that roundtop carburetors (which '69's are) are easier to work on,due to their simplicity,but they are a bit more complicated due to their four individual throttle cables vs the later roundtops with a lifter fork arrangement for activating the slides. The '69's are known for coming out of synch easier due to this.



Any engine from '69-'78 will fit your frame. Regardless if it's a K or an F, so long as it's a manual transmission model. Automatics have different mountings.

Also, the front sprocket on the '77 & '78 models (K & F ) protrude further out than previous models. Whichever engine you use make sure you use the corresponding cush drive (rear sprocket carrier) to make sure your drive chain is running where it needs to be. There's a 10mm difference between the two versions.

[TOOLS1]

shinyribs wrote

Well,kinda. The '77 & '78 F models (black engines) had a pretty aggressive cam profile that apparently wears out valve guides much faster then the other models.


Any engine from '69-'78 will fit your frame. Regardless if it's a K or an F, so long as it's a manual transmission model. Automatics have different mountings.

You are almost right about the heads. The 77-78 F models did use a more aggressive cam, but it was the change that Honda made in the valve angles that caused the problem. Also the 78 K model had a change to the head. They used the valve keeper design from the 77-78 F model, and you can not get replacement valves for the 78. However you can replace the valve, keeper, and retainer with the 69-77 valve components.
As for different mounts on the A models. Not correct. The mounts are in the same places. The difference is that the A does not have the long mount sticking out on the top left rear of the case (the one that always breaks off). Instead it uses a spacer.
TOOLS

[shinyribs]

Oh,I see. Boy am I glad you corrected me on that. Thanks for the info!

[TOOLS1]

You are welcome.
TOOLS