the moment I am going to run this as a technical blog until I figure
out how to split the files into different sections for downloading.
How to date your TY175 Twinshock - Updated
This is based on year of original manufacture. Production
usually started July/August of the previous year.
and/or frame number all are 3 digits 'dash' 6 digits. Engine &
frame numbers didn't always match but were usually fairly close.
525-0***** 1975 Model TY175B
525-1***** 1976 Model TY175C
1977 onwards Model TY175D/E/F/G
More details to follow
How to date your TY250
This is based on year of original sale.
Production usually started July/August of the previous year.
Engine and/or frame number all are 3 digits 'dash' 6 digits.
Engine & frame numbers didn't always match but were usually fairly
461-****** 1973-1975 TY250J Japan market
model but a few have appeared in Europe. This model was essentially a
TY250B released onto the Japanese market 2 years earlier than the rest
of the world.
434-****** 1974 Model TY250A
493-0***** 1975 Model TY250B
1976 Model TY250C
493-2***** 1977 Model TY250D
493-3***** 1978 Model TY250E
not exactly sure what happened after this as we have never seen a TY250
with a number later that 493-3*****. The 1979 TY250, which would have
been the F model had the black and red pinstripe on the fuel tank. All
we have seen with this tank graphic had engine numbers starting
493-3***** and was for sale in the UK up until 1983.
No matter what you read elsewhere there was no such thing as a 1981
TY250H with different headstock, different brake shoes etc. I have
traced it back to, I think what was a typo in an aftermarket parts
suppliers catalogue and it has been copied by numerous other
The only other possibility was it was a
planned model that never came in to existence but parts drawings, and
possibly parts had started to be produced for it. This was certainly the
case with the 1977 Kawasaki KT250 model, that was planned with black
controls and mudguards but the project was shelved at the last minute
after some parts had been produced and these pop up on eBay every so
Of course I may be talking total bollocks and if you have
any information to correct my comments the please e-mail me here