Whats the difference

[steve7406]

Whats the difference between a 1975 mx 250 and a 1975 yz 250 which is better.

[motomaniac]

ones a production bike and the other isnt

[John Orchard]

Really?  I thought they were both proddy bikes; one in yellow with thermal-flow rear shocks and the other grey with cantilever ?

[motomaniac]

Really?  I thought they were both proddy bikes; one in yellow with thermal-flow rear shocks and the other grey with cantilever ?

first cantilever was a mx250 B in 75 ,it was white.MX250A was 74 yellow ,twin shock. no?

[BETRIC]

73/74 MX250 had the twin shocks, the YZ250 monoshock was a 74 model in OZ, but it was a 75 model in the USA, in 75 we got the MX250 monoshock only, 74 YZ, 75 MX used the same basic frame but with different motors, 74 YZ used the same style motor as used in the 73 YZ250, 75 MX used the same motor as was used in the 76 YZ250C, so I would say that the 75 MX had a better motor than the 74 YZ, the MX250B should have been known as the 75 YZ250 model, the USA and OZ both got the YZC in 76, the YZC still used the same basic frame with a different style rear swing arm ??.

[motomaniac]

I think the earlier chrome bore 8 bolt YZ's were superior to the later 75MX and 76YZ 6 bolt steel liner jobs.

Whats the diff in the swingarms ?

[JohnnyO]

The first monoshock was the YZ250B/360B in '74, the '75 Yamaha was the MX250B/400B and '76 was the YZ250C/400C. There was no YZ in '75 in Australia other than the YZ125C

[motomaniac]

The first monoshock was the YZ250B/360B in '74, the '75 Yamaha was the MX250B/400B and '76 was the YZ250C/400C. There was no YZ in '75 in Australia other than the YZ125C

yep,hence my first post.
 

[motomaniac]

The first monoshock was the YZ250B/360B in '74, the '75 Yamaha was the MX250B/400B and '76 was the YZ250C/400C. There was no YZ in '75 in Australia other than the YZ125C

except how many YZB's came here in 74? , not really available unless your name was Trevor Flood.

[JohnnyO]

The first monoshock was the YZ250B/360B in '74, the '75 Yamaha was the MX250B/400B and '76 was the YZ250C/400C. There was no YZ in '75 in Australia other than the YZ125C

yep,hence my first post.
 

The '74 YZ250B/360B was a production bike available in limited numbers mid '74

[JohnnyO]

A couble of Qld B graders had 250B's in '74, i think you had to be someone to get a 360

[motomaniac]

The first monoshock was the YZ250B/360B in '74, the '75 Yamaha was the MX250B/400B and '76 was the YZ250C/400C. There was no YZ in '75 in Australia other than the YZ125C

yep,hence my first post.
 

The '74 YZ250B/360B was a production bike available in limited numbers mid '74

Yer I know . but in 75 an MX250 was a production bike and a YZ250 wasn't

[JohnnyO]

The first monoshock was the YZ250B/360B in '74, the '75 Yamaha was the MX250B/400B and '76 was the YZ250C/400C. There was no YZ in '75 in Australia other than the YZ125C

yep,hence my first post.
 

The '74 YZ250B/360B was a production bike available in limited numbers mid '74

Yer I know . but in 75 an MX250 was a production bike and a YZ250 wasn't

True

[Freakshow]

THE 73-73-75 call it what you will yz motor is better than any MX any year.  Apart from the lighter weight the YZ motor is sweet to ride.  the mx a or B still feels like an MX but the later one just might have a softer ride as a plus.

I got A and B and there all bike, no flim flam.  i know what id choose

[Nathan S]

YZ-B motor is the last of the old DT1 type, MX-B is the later 'long case' motor that was first seen in the DT-A and MX-A.