Vintage Dirt Bike Q & A

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PostPosted: Mon Sep 26, 2016 8:29 am 
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Joined: Mon Jun 01, 2015 6:29 am
Posts: 34
Location: Burlington NC
Will a 76-78 CR125 Stator and rotor (flywheel) fit on a 75 CR125 ?
I know the 74 and 75 are different. I also know the 75 and 76-78 have different part numbers but has anybody ever put a later model combo on a 75?

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76 Honda CR250m1
80 Honda CR250R
79 Yamaha YZ250F
79 Yamaha YZ400F
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PostPosted: Mon Sep 26, 2016 9:44 am 
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Joined: Sun Nov 30, 2008 12:10 pm
Posts: 1010
Location: Connecticut, USA
Yes, any year of CR125M ignition will physically fit any other year of CR125M - but the stator and rotor date codes should match each other or the timing marks will be off. As you probably already know, the stator, rotor, and CDI boxes are all stamped with codes for year of manufacture (7A = 1977, January). The CR125M CDI boxes and coils are identical for all years.

I have at least one each of all the stator/rotor sets, and the only differences I've seen (or measured) are the timing marks - which is understandable, as the '74, '75, and '76-'78 CR125M's each use a different timing spec and have a different p/n. There could be other changes too.

I'm currently running 7H and 7I complete sets on my MR175 engines.

Ray

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'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric


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PostPosted: Mon Sep 26, 2016 1:47 pm 
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Joined: Mon Jun 01, 2015 6:29 am
Posts: 34
Location: Burlington NC
Thanks Ray this helps a lot.

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73 Honda CR250m
74 Honda CR250m
75 Honda CR250m1
76 Honda CR250m1
80 Honda CR250R
79 Yamaha YZ250F
79 Yamaha YZ400F
74 Yamaha GTMX80
75 Honda MT250 x3
66 Honda CA77 305 Dream x2
67 Honda CB77 305 Super Hawk
2009 Yamaha YZ250 2-smoker
2008 Honda CRF150RB


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 Profile  
 
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