[grateguy]

I have a fully rebuilt SL350 K1 engine and a 1969 CB350 frame. From everything I read the engine should fit into the frame as easily as the CB engine. I've been wrestling with the engine/frame for about 2 hours now and have made almost no progress. I've got it sitting as it should be but I can't get more than 2 mounts to line up. Am I wasting my time trying to make these fit together or am I just going about it wrong?

 

[doode]

I've never tried this combo, and not sure if they work or not, but when fitting a cb/cl350 engine I start with the lower rear mount bolt. The the upper rear mount. Then the lower fronts. Head steady last.

 

[JamesPal]

On the 450 DOHC it helps to use a undersize pin to get it close.

 

[grateguy]

In the past I've been able to use a large screwdriver and mallet to help align the mounting holes. This is the first time I've had this much trouble. Maybe I need to find something more tapered. I can get the hole/mount to line up pretty close.

 

[doode]

In no situation with the correct engine and frame should you need a mallet

 

[J-T]

This has been discussed here, not sure there's been a definite resolution:

http://www.hondatwins.net/forums/51-frame-suspension-steering/96153-cb-350-engine-sl-350-frame.html

 

[Yendor]

OK let look at what you have:

SL350 K1 (this should be a version Without Electric Start)

CB350 '69 A standard Single Down Tube Frame the same as was used on the SL350 K0.

This should work.

Take some pic's and post them

 

[grateguy]

I just had a thought..

When I rebuilt the transmission, I bought a different LOWER engine case from a SL350 because the one the motor came with had some damage. Is it possible that the transmission is from a different kick-only SL350 engine that won't fit into the CB350 frame?

I wouldn't have thought this would be an issue, but I can't get more than 2 mounts to line up at a time, and even then it's a struggle.

 

[grateguy]

Got it! I tried just about every combination of mounting bolt order before getting it. I think I wound up going with the front 2, then the bottom rear, then the top head bracket, then the top rear.

 

[doode]

Thanks for the update! Bet you're glad to get that completed!

 

[Yendor]

As an FYI the reverse might not work.

A CB/CL Motor w/Starter might not fit a later SL Frame with the double down tube.

There is a chance the starter may interfere.