Topic: CB550 can be bored to 672cc!

[bill440cars]

    I can understand swapping heads. What I don't understand is using the crank, cylinder and head of the 650 in the 550 case? Would it be possible to use a 650 engine with a different primary chain set-up?
Just a thought. Later on, Bill

[Rob Lloyd]

    I can understand swapping heads. What I don't understand is using the crank, cylinder and head of the 650 in the 550 case? Would it be possible to use a 650 engine with a different primary chain set-up?
Just a thought. Later on, Bill

Yes, you can use a 650 engine in a 550, but I don't understand your question about the primary chain. Why would you need to change it?

[bill440cars]

Rob,
     I should have said "cam chain". n9viw said he hadn't had much luck in the past with the "Hy-Vo
 cam chain. Rob, you'll have to pardon my ignorance but, what is meant by"Hy-Vo" chain? I only
 mentioned the chain because he seemed to have a problem with it. Myself, I haven't had alot of
 experience with the Honda fours. I've had some experience with others in the past but, I'm always
 willing to listen and learn from others. Anyway, couldn't the 650 be a performer with modifications,
 just like the others? Waiting to hear.     Bill

[Rob Lloyd]

Rob,
     I should have said "cam chain". n9viw said he hadn't had much luck in the past with the "Hy-Vo
 cam chain. Rob, you'll have to pardon my ignorance but, what is meant by"Hy-Vo" chain? I only
 mentioned the chain because he seemed to have a problem with it. Myself, I haven't had alot of
 experience with the Honda fours. I've had some experience with others in the past but, I'm always
 willing to listen and learn from others. Anyway, couldn't the 650 be a performer with modifications,
 just like the others? Waiting to hear.     Bill

Hy-Vo is a brand name for a style of chain. Commonly called "silent chain". It's more common now in cars. It should be stronger and more efficient than the rolelr chain that was stock on the 500/550. But things don't always work as they should, right?

Yes, the 650 could be a performer. I don't see why the 750 sleeve trick wouldn't work just as well on the 650 as it does on the 550. What would and 836 piston kit take a 650 out to anyway? Something like 720cc, right?

[bill440cars]

Rob,
     I should have said "cam chain". n9viw said he hadn't had much luck in the past with the "Hy-Vo
 cam chain. Rob, you'll have to pardon my ignorance but, what is meant by"Hy-Vo" chain? I only
 mentioned the chain because he seemed to have a problem with it. Myself, I haven't had alot of
 experience with the Honda fours. I've had some experience with others in the past but, I'm always
 willing to listen and learn from others. Anyway, couldn't the 650 be a performer with modifications,
 just like the others? Waiting to hear.     Bill

Hy-Vo is a brand name for a style of chain. Commonly called "silent chain". It's more common now in cars. It should be stronger and more efficient than the rolelr chain that was stock on the 500/550. But things don't always work as they should, right?

Yes, the 650 could be a performer. I don't see why the 750 sleeve trick wouldn't work just as well on the 650 as it does on the 550. What would and 836 piston kit take a 650 out to anyway? Something like 720cc, right?

      Rob,
          Sounds like a person could end up with a real "Sleeper" that could blow away the competition
  when awakened!! Would be interesting to see how it would perform. Later on, Bill

[Terry in Australia]

"Vroom, Vroom, KA-BOOM!" I reckon a 672CC 550 would be so fragile it'd make a Ducati look like a Mack truck, ha ha!

[n9viw]

How about this setup:
550 rocker cover
Megacycles 126-00 mild 550 cam
650 head
550 block with
750 cylinders and
836 pistons

Is such a mishmash conglomeration possible? Or even desired?

[cb650]

I want to get over the mega site and check the cam specs out compared to a stock 650 cam.




                   Terry