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Author Topic: '73 250 final drive  (Read 2382 times)

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Offline bigk

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'73 250 final drive
« on: January 18, 2010, 03:44:58 pm »
I just picked up a '73 CZ250 enduro. It has a huge 17t front srocket on it, can anyone tell me the standard gearing and/or the MX 250 gearing please?
Cheers,
K
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Offline JC

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Re: '73 250 final drive
« Reply #1 on: January 18, 2010, 03:57:20 pm »
M,
Believe it or not, std was (listed as) 18/52 - & (surprise, surprise!) they were waaay overgeared, making the large gap between 1st & 2nd appear much worse.

Later Desert Racer using the same engine ran 15/52
« Last Edit: January 18, 2010, 05:38:17 pm by JC »
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Offline bigk

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Re: '73 250 final drive
« Reply #2 on: January 18, 2010, 07:02:32 pm »
Thanks John, I'll use 15/52 as a starting point.
Cheers,
K
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Offline VMX60

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Re: '73 250 final drive
« Reply #3 on: January 20, 2010, 11:17:44 pm »
Running a 988 motor in VMX go down to a 13t front will bring the overall gearbox ratio closer a 15t is still way overgeared for MX
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Offline bigk

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Re: '73 250 final drive
« Reply #4 on: January 21, 2010, 08:43:48 am »
Where's the best place to get sprockets?
Cheers,
K
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090

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Re: '73 250 final drive
« Reply #5 on: January 21, 2010, 08:49:40 pm »
Titman has some from memory. Worth a call.
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Offline Canam370

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Re: '73 250 final drive
« Reply #6 on: January 21, 2010, 09:11:37 pm »
I have new 61T available -  if you don't change the c/s sprocket it will give you acceptable gearing.
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