Author Topic: MX400B  (Read 6107 times)

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Offline Carey W

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MX400B
« on: June 29, 2016, 08:38:59 PM »
I recently posted in the introductions section and will share a resto I'm doing on a MX400B. It looked a bit rough as the paint came off it when it was washed but all bearings, brakes, cables ect are in great condition. The bike sat covered with a tarp for 36 years until 4 weeks ago.
I'm after a silencer and sprocket cover / case for it if anyone can help, I will post photos of the resto and bike here so please feel free to offer help or advice.

The plastics are very chalky and I think beyond repair. Are the plastics from http://www.vmxunlimited.com/categories/Yamaha/MX/Plastics/ good quality reproductions or is there a better / cheaper option.

As she was when I picked it up.



Brakes as they were after 36 years.

« Last Edit: June 29, 2016, 08:48:11 PM by Carey W »

Offline Carey W

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Re: MX400B
« Reply #1 on: June 29, 2016, 08:53:36 PM »
every bolt off to the cad platers along with a few parts not in the pic.


Engine ready to go back in the frame.




Offline Carey W

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Re: MX400B
« Reply #2 on: June 29, 2016, 08:58:27 PM »
Unfortunately the rims will be replaced with new did dirt stars due to a crack in the rear one. Probably happened 41 years ago in this race! It's bike #171.



HeavenVMX

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Re: MX400B
« Reply #3 on: June 29, 2016, 09:57:17 PM »
Unfortunately mate VMXUNLIMITED is no more. Les has retired to rest 8) and the very best wishes to him for a long and happy retirement.

Prime8 Racing is now the go. They also have a great WEB page, excellent service and support the VMX / Vinduro community.

http://www.prime8racing.com.au/

Those MX400B engines are FAST!

NOTED: Can not believe that the guy in the second last picture riding the Montesa has the make misspelt on his jersey MONTESSA  ::) WTF
« Last Edit: June 29, 2016, 10:01:57 PM by HeavenVMX »

Offline Carey W

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Re: MX400B
« Reply #4 on: June 30, 2016, 08:14:23 PM »
Good spotting on the Montessa thing, his style looks ok though. Maybe his wife or mum got it wrong!

Offline 80-85 husky

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Re: MX400B
« Reply #5 on: June 30, 2016, 09:43:46 PM »
its great to do up an old bike and find its new inside.

Offline Carey W

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Re: MX400B
« Reply #6 on: July 05, 2016, 07:25:03 PM »
A couple of rainy weekends helped to speed things up, still after a sprocket case if anyone can help.











« Last Edit: July 05, 2016, 08:41:29 PM by Carey W »



Offline Rossvickicampbell

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Re: MX400B
« Reply #9 on: July 06, 2016, 10:43:16 AM »
If you wish to race it have a look at the combined clutch and sprocket cover from John Tate - think they will fit the 400 also.  If you are interested I have a NOS air box for this model.

Cheers
1974 Yamaha YZ360B
1980 Honda CR250R - Moto X Fox Replica

Offline Freakshow

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Re: MX400B
« Reply #10 on: July 06, 2016, 12:14:33 PM »
how much for the airbox Ross ? or the used one of this one if he wants it :)
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff

Offline Carey W

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Re: MX400B
« Reply #11 on: July 07, 2016, 06:10:16 PM »
Put the pipe back on today and started it up again, started 1st kick.







http://vid1177.photobucket.com/albums/x341/noturbo/Mx400b/IMG_0768.mp4



Offline Carey W

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Re: MX400B
« Reply #12 on: July 07, 2016, 06:47:11 PM »
Anyone know how to soften the original seat cover? As you can see the creases show up and it leaves creases when you get off the seat.

Offline Rossvickicampbell

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Re: MX400B
« Reply #13 on: July 08, 2016, 10:28:31 AM »
not much Freaky - $125 - just the body though remember.
1974 Yamaha YZ360B
1980 Honda CR250R - Moto X Fox Replica

Offline Tomas

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Re: MX400B
« Reply #14 on: July 08, 2016, 11:56:46 AM »
park it outside on a hot sunny day. hot sun will soften the old vinyl  :)