hello evrybody,

this forum and website is just fantastic...

i've got a question on the website at this page

http://www.cb750sandcastonly.com/support23.htm

it's writing


     D.  Outlet Diameters
           1.  Early Type - 52mm o.d., 48.5mm i.d.
                A.  No internal baffling, essentially megaphone
           2.  Late Type - 52mm o.d., 48mm i.d.
                B.  Internal baffling present


what is O.D and I.D??
i understand the difference between the early and late exhaust type but where exactly is the 48 or 48.5 mm size??

second question i've got 2 cb750 diecast one 10131XX and the other one 10282XX
in your opinion what type of exhaust was on this bike when it was new??

unstamped or HM300

thanks to your help

Benji

Hello evry body
i've got a question
in my uper case there is writing 917 in Pen Black the case has never been open before me?
what that mean?

is it The “month/day” notation after the engine number is the date the upper crankcase was cast?

thanks to your reply
Benji

Hello
my name is benjamin
i'm french ( nobody is perfect.....)
i live in the south of this beautiful country

the next 10 year i was owner of the cb 1 004869 engine and 1 004677 frame  in mint condition
it was original "french" cb

i decided to sold it for having a new home.... i
i'm still owner of 2 yamaha xt500 a 1976 (first model) and a 1978
i've got a Trial moto montesa 4RT ( 4 stroke honda)
and my 1200 gs BMW for working
but i'm decided to have again a cb 750

i have find one in france , it come from US
she is goldi
It's not a sandcast but an original die cast unrestorated

i love the sandcast it's the best but it's really expensive and i can't afford me that for the moment
and i have a flash when i find this die cast

i'll send you picture (she need a good refit but i'd like to keep the maximun of unrestorate parts)

hope you 'll help me

thanks for this nice website i learn many many detail important

kind regard
Benji