305 engine mods.

[G-Man]

Bill

You've got me again! You have to enlarge the openings in the crankcases to get the bigger liners in there. The barrels, when bored out a little, will accept the CB750 liners.

I was thinking that you could replace the bigger bore jugs with standard ones if you decided you didn't like it.

Just shows what 'thinking aloud' does for you!

I recall seeing some posts where one of the member fitted some flat top pistons in a Dream engine and thought that they would create quite a nice combustion chamber shape. CB750 pistons (61mm I think) are pretty flat on top but I'm not sure what the gudgeon pin diameter is.

I'm still looking at a GSX 250 head (8-valve) for my cafe racer project. How about an 8-valve Dream?

G

[conbs]

I think you are starting to get into the Hi-po range with 8 valves, but it is very intriguing, nonetheless. I can't wait to hear how that one works.

[Downunder dream]

Awesome info guy's, great help. As mentioned before, I'm not after any real HP gain. I thought that with a little head work for better flow and a cam/carb set up I would end up with a great sounding reliable ride. If better low end torque is achieved, well that's a bonus. I will now look at sourcing a CL carb and cam to suit and then Suss out the exhaust to suit. Of all places, there is a company here in Australia that makes replica mufflers of the originals. These may be able to be tuned to the mods I'm looking at.
This is fun!
Cheers,
Scott.

[G-Man]

I've got some of the mufflers from Overlander. I can send pics if you like. They have fixed internal baffles but otherwise a really good match for the originals.

G

[Downunder dream]

I take it that a CL head will not bolt straight on as this has not been mentioned. As you can probably tell, my knowledge is very limited at the moment! I will take more pics over the weekend on a better camera and email them to myself from another laptop and try and post. Frustrating that an ipad doesn't have a USB connection. Did a search and found that the camera in it is less than 1 meg!!! Lot of dicking around, but this my only computer.
Thank's again everyone, and will keep you up to date as things progress.
Cheers,
Scott.

[conbs]

CL head will bolt on, but the carbs are blocked by the frame. You would need to build some manifold/spacers to move them further out on each side. I think I recall reading a post that it had been done before, but I am not certain. Seems like a lot of work.

[Downunder dream]

Would you be talking about CL 305 or 350 carb and cam. May be a stupid question, but worth asking.
Cheers,
Scott.