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Author Topic: MX125 gearbox.  (Read 4101 times)

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Offline Nathan S

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MX125 gearbox.
« on: July 26, 2007, 04:42:22 pm »
Still chasing this... I need the gears/gearset/engine/whole bike from a Yamaha MX125A/B/C or YZ125A or AT1MX.

5-speed, not the 6-speed.

04000 23847 if you can help.
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Quicksilver

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Re: MX125 gearbox.
« Reply #1 on: July 26, 2007, 04:52:08 pm »
Will MX100 be same mate? Have one complete engine if its of use.
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Offline Nathan S

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Re: MX125 gearbox.
« Reply #2 on: July 26, 2007, 06:54:14 pm »
Hmmm... good question... Shooting from the hip, I'll say No, but let me look into it.

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Offline Nathan S

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Re: MX125 gearbox.
« Reply #3 on: July 26, 2007, 07:10:20 pm »
Nup, no good. :(

The 1st gear pinion gear should have 12 teeth, not 11.
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Offline vandy010

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Re: MX125 gearbox.
« Reply #4 on: July 29, 2007, 04:37:45 pm »
nathan, did you check what year that mx100 was?
as the old 74 models run the same ratio's as the 5 speed mx125a/b
my mx125a, i only use first gear around the pits and in some cases it's will pull a 2nd gear start making first useless anyway.
just a thought.
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Offline Nathan S

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Re: MX125 gearbox.
« Reply #5 on: July 29, 2007, 06:41:31 pm »
Ah, good point... I'm 99% sure that Quicky's bikes are early 80s models, rather than the MX125 style ones?

Very interested if I'm wrong though!
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Offline Tim754

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Re: MX125 gearbox.
« Reply #6 on: July 29, 2007, 06:58:31 pm »
What about the 125 engine in the parts one I have for you Nathan .I will check out the engine designation tomorrow and post back here as an amendment. OK   Tim
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Offline Nathan S

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Re: MX125 gearbox.
« Reply #7 on: August 23, 2007, 09:16:25 pm »
Well... slight ammendment... I pulled down the CT1 engine last night.

It has an AT2MX gearset (!) but second gear and the input shaft are both stuffed. So I 'only' need the input shaft and the 2nd gear pinion and wheel. Will still be more than happy with a complete gearset though.

If I'd known it was an AT2MX gearbox, I'd have been a lot more careful with it.  :'(
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