305 Cylinders

rdsrus · Post by **rdsrus** » Mon Jan 12, 2015 1:24 pm

Hello,new to this forum,been involved with Hondas since 1968. I have offered to help a friend trying to start a restoration shop with id ing parts. Starting with 305 cylinders and heads I have 7 cylinders 3 of them have casting mark 305cc H1,1 has 305cc H2, 1 305cc M1,1 305cc M2, 1 305cc only. Is there any resource for id ing which serial # range,models these fit? Any help would be appreciated, Thanks in advance. Bill

G-Man · Post by **G-Man** » Sun Jan 18, 2015 12:27 pm

Bill

Welcome to the forum.

There was a change to the lubrication system sometime in '61/'62 and the barrels changed. After that the differences are just cosmetic such as a change to die casting from sand casting.

This a late style gasket on an early crankcase.....

G

rdsrus · Post by **rdsrus** » Mon Jan 19, 2015 11:41 am

G-Man, Thank you for the info,will probably have questions about heads and tappet covers after i get the cylinders sorted. Thank you again. Bill

OldStan · Post by **OldStan** » Mon Jan 19, 2015 11:37 pm

There was a change on the last barrels for the narrower can chain adjuster. On my 67 its marked just 305cc.

G-Man · Post by **G-Man** » Tue Jan 20, 2015 1:56 am

Stan

Of course. Forgot about that....

G

rdsrus · Post by **rdsrus** » Tue Jan 20, 2015 1:10 pm

Stan, Thanks for the additional info,do have one set as you described. Thanks again. Bill