[alexis159]

I been searching for new pistons for my cb350e and I found an old
HAP JONES PISTONS FOR A HONDA CB350 .12/OVER BIG BORE.
I never heared of this brand, so what do you think?.

 

[tbpmusic]

I been searching for new pistons for my cb350e and I found an old
HAP JONES PISTONS FOR A HONDA CB350 .12/OVER BIG BORE.
I never heared of this brand, so what do you think?.

Yeah, Hap Jones is an old name in the business.
I think your talking about 12'th over, which would be 3mm oversize.
It will be the biggest available, and will preclude any further boring in the future, if it's needed, since there's no meat left in the cylinders when you're done.

 

[alexis159]

I only want to know if their work well on these bikes, compresion with this pistons it's ok?.
The cilinders it doesn't matter like finding 1mm overboard it's difficult and they are really expensive.

 

[tbpmusic]

I only want to know if their work well on these bikes, compresion with this pistons it's ok?.
The cilinders it doesn't matter like finding 1mm overboard it's difficult and they are really expensive.

They should work ok - the compression would only be affected if the piston "dome" shape is substantially different.

I just wanted to caution you that no further overbores will be possible in the future......

 

[alexis159]

thanks for the advice but next time I would try to buy a new cylinder.

 

[crazypj]

You can always shrink out the liners and fit new ones from LA Sleeve.
PJ

 

[alexis159]

hi again, as I loose the auction for those hap jones, I now start searching for big bore pistons. Do you know from wich bike could I try to use.?
I heared that cb750 or kawasaki gpz750 would work great