what is the earlist engine and frame no for 1973 cr250m

[jimg1au]

hi
i see some frames have date plates fitted which states the month and year cr250 s were made.mine just has the frame no.no plate has ever been attached to the steering head.also there is about 260 no different between the frame no and engine no.i was told by po it came like that and the only mod made was fitting a yz250 yamaha reed valve inlet manifold to the bike.
my no are
frame  CR250M-1000907
motor  CR250ME-1001167
CHEERS
jimg
1973 cr250
1976 cr250

[bigk]

I reckon it's a 1975 M1,(redback). It's normal for Honda engine & frame numbers to differ.
Cheers,
K

[jimg1au]

its a 1973 with billet crank which came out only in the first batch.i have a 1976 as well and it is nothing like it for a start the exhaust is on the rhs

[Maico31]

Honda never had matching engine and frame numbers, that's a Yamaha thing.  '75 CR250M1 frame and engine numbers started with 2 as the prefix. Some of the early CR250's did come with a billet crankshaft.

[Quicksilver]

Jim.
I think numbers going CR250M 100+++ are from 1973 numbers going CR250M 101+++ are the the 1974. Im not 100% on that but I am sure theirs some Honda men on forum that woiuld know for sure.