What's going on with this ?

[GMC]

Thought you had checked the frame No??

[Ted]

2,994 pages to go

[Nathan S]

I will get some more photos and report back.  All very mysterious 

Also of both rear tank mounts.

Shame that some moron hacked the motor mounts off Frame B...

[YZ250H]

Thought you had checked the frame No??

Both 509 

Frame A


Frame B

[Nathan S]

Hazy memory of this... but didn't both MX250B and YZ250C start with 509? That difference in the numbers (particularly the one starting in 10xxxxx) suggests one of each, yes?

[GMC]

As if Tony is not confused enough already…

Part # = 509-21110-05-33
Part Description = FRAME COMPLETE YAMAHA BLACK
Model Count = 5
IT400C 1976 400 IT400 Dual-Purpose
MX250B 1975 250 MX250 Off-Road
MX400B 1975 400 MX400 Off-Road
YZ250C 1976 250 YZ250 Competition Motocross
YZ400C 1976 400 YZ400 Competition Motocross

[Davey Crocket]

If my memory serves me correct....
509-00xxxxxx= MX250B
509-10xxxxxx=YZ250C
509-20xxxxxx=IT400C......but I might be wrong on this, could be 510
Works the same for MX400B and YZ400C....510...
Looks like you'll be making 1 frame from 2 going by those pickies, I only sold all that stuff 6 months ago, frames, swingarms, airboxes, bla bla.
Lots of NOS too....minter tank...still have a NOS seat, but thats not for sale.

[TM BILL]

Looks like you'll be making 1 frame from 2 going by those pickies, I only sold all that stuff 6 months ago, frames, swingarms, airboxes, bla bla.
Lots of NOS too....minter tank...still have a NOS seat, but thats not for sale.

Thats it Joan rub the mans nose in it 

Have you booked those tickets yet ?

Maybe Mr Bam bam wants a come over with you and Brad  for a ride  we can find him a bike 

[Davey Crocket]

Booking today,fly on Thursday to Jaffatown and out following Saturday, so a week and a bit should be enough time to get all your new MNZ VMX class rules in. ...he has a big nose Bill.

[YZ250H]

If my memory serves me correct....
509-00xxxxxx= MX250B
509-10xxxxxx=YZ250C
509-20xxxxxx=IT400C......but I might be wrong on this, could be 510
Works the same for MX400B and YZ400C....510...
Looks like you'll be making 1 frame from 2 going by those pickies, I only sold all that stuff 6 months ago, frames, swingarms, airboxes, bla bla.
Lots of NOS too....minter tank...still have a NOS seat, but thats not for sale.

Yeah, thanks for all the good news John 

You got any bits left 

Just had onther closer look at a parts diagram it looks like the oxy starters are not on the 250C  so maybe just the engine mounts and bash plate mounts need to be transferred to Frame B


 

[YZ250H]

PLEASE, PLEASE, PLEASE tell me the motors are not numbered in the same way as the frames . 
Motor number 509-000545 or something like that.

[Nathan S]

"The motors are not numbered the same way as the frames".
Are you happy that I've lied to you?

[YZ250H]

FAAAAAARRRK.  So now I have an MX250 bottom end as well. 

I am almost ready to part this thing out.

[Viper666]

Appology time.

Have not read entire thread so sorry if alrady covered.

Nathan was right, I didn't look at the bottom mount. It is off a DT125/175 1978 model. The spare I have at home has the same lower mount and has 2A6 on it (DT125E). The rest is identical to the YZ100G apart from the replacable lower bush.

Never too old to learn.

[Ted]

FAAAAAARRRK.  So now I have an MX250 bottom end as well. 

I am almost ready to part this thing out.

Don`t do that. It will only run to 20 or 30 pages if you do that