Thanks alistair i keep with the Honda ns 250 r i got the expansion champers painted ages ago there in the hot water cupboard so they wont rust .

I have a friend who owns a Honda Ns 400 r someone imported it from canada to the usa then he brought it here . then my friend roger got it

he had it off the raod for a few years as the rear cylinder was flooding i thought be just a carb float problem or reed valve thing and suggestions

he said was real beast when it got around to 7000 wanted to weelie . he raced back in the 70,s in england

I took some photos of my engine on my phone i upload them when i can oh how can i find on

CMSNL.com also list 13101-KM4 piston A as well as 13101-km4 - rings. i searched in the past and got nothing is the the first number the part number

i found gasket sets on ebay .

thanks again