IM CURRENTLY REFRESHING THE ENGINE ON A MATES 325 BEAMISH. IVE SPOKEN WITH THE VERY HELPFUL STEVE PITT AT THE BEAMISH OWNERS CLUB ABOUT SOURCING AN 81.00mm PISTON. I KNOW THERE ARENT ANY AT THE MOMENT, BUT THE OLD ADAGE SAYS IF YOU DONT ASK…………!! HAS ANYONE GOT AN 81.00mm PISTON SAT IN A WORKSHOP DRAWER THEY BOUGHT YEARS AGO , JUST IN CASE AND NO LONGER NEED, OR AS AN ALTERNATIVE I COULD MAKE A SET OF 80.50mm PISTON RINGS WORK ON THE EXISTING PISTON SHORT TERM. IM ALSO A BIT CONFUSED AT THE OPTION OF THREE DIFFERENT BASE GASKETS THICKNESSES AVAILABLE FOR THAT MODEL. HOW DO I DETERMINE WHAT THICKNESS I NEED. 

THE ENGINE IM WORKING ON HAS THE 250 HEAD ON IT WITH THE APPROVED HEAD GASKET/SPACER THAT CORRECTS THE COMPRESSION RATIO.

THANKS EVERYONE, FIRST TIME IVE WORKED ON A SUZUKI.LOTS OF SPANISH AND FANTICS BUT NOT A BEAMISH 🙄

Try Crooks Suzuki. Long time Suzuki Dealers. Nigel Birkett worth a call too

yamaha dt 360 pistons fit try getting one of them