Pistons?Rings?

[teazer]

That liner looks to be beyond a quick clean up. Get it bored for larger pistons and be done with it. I have a set of 450 barrels here and they also need to be bored to first oversize. That's hwy they make a few oversizes.

 

[xb33bsa]

no liner i piece cast iron barrel
i have a good lightly used set of .50mm pistons you can have then for $15 shipped to you

 

[crazypj]

CB450 never used a 1 piece all iron cylinder.
Only time I've seen that was on the CA192 and similar from early 60's
There is a thread on Honda Twins about modifying 71mm Suzuki GS450 pistons to fit CB450 as I believe they are still available from Suzuki cheaper than aftermarket pistons (Henning's, et.al.)
70.11mm is roughly 0.005" oversize, not much further to get 0.25mm over pistons in there (0.010")

 

[xb33bsa]

CB450 never used a 1 piece all iron cylinder.
Only time I've seen that was on the CA192 and similar from early 60's
There is a thread on Honda Twins about modifying 71mm Suzuki GS450 pistons to fit CB450 as I believe they are still available from Suzuki cheaper than aftermarket pistons (Henning's, et.al.)
70.11mm is roughly 0.005" oversize, not much further to get 0.25mm over pistons in there (0.010")

thanks for correcting me pj, it was my memory gone wrong
anyway for the op the offer still stands on the .50mm/.020" over pistons,i would have sold them as a usable kit with the cylinder as well if the motor had not sat so long as to rust the bores

 

[crazypj]

I've got some heavy duty 80 grit honing stones for my AMMCO, wouldn't want to take more than 0.010" out though.
There isn't any real cheap way to fix it, the offer of 0.50mm pistons would probably be cheapest way to get it done

 

[fordop87]

I'll take you up on those pistons sir. If you PM me i'll send some $$$ your way.
I really appreciate it.

By the way, I guess i lied when I said my pistons where good. After I got the carbon
cleaned off I found something new.
It appears the last feller that got into this enginewas even more clueless than me.
Tell me if you can guess what happened here...

Put the piston in backwards!!! Freakin kidding me. I thought the exhaust valve had hit
but it couldn't make that mark. I lined the intake valve up exactly with the flat spots.
Also, it looks like he took the pistons to a bench grinder with a wire wheel because there
are deep scratches on the dome all in the same direction.

The valves are good as far as i can tell. I think he just turned the engine by hand and and didn't
run it.

 

[fordop87]

Just out of curiosity, what has to be done to use Henning's racing pistons?

Like these>>> http://www.ebay.com/itm/HONDA-CB-450-CB450-FORGED-RACING-PISTON-BIG-BORE-74MM-/260925369016?pt=Motorcycles_Parts_Accessories&hash=item3cc05d2ab8&vxp=mtr

Not planning on it because it's way out of my budget right now, but just wanted to hear from someone more knowledgeable.
I've heard of having to use copper gaskets with these... correct?

 

[crazypj]

I'm pretty sure the Henning's pistons will need new liners fitted to block.
(heat block, drop out old liners,bore bare block, fit oversize liners, bore oversize liners to size)
May also require crankcase bored out
Stock liners will easily take a 2mm overbore but 4mm is too much
As for the other question,
Yes, copper gasket, cheaper than composite plus re-useable