Author Topic: Front end conversion RM125A  (Read 409 times)

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Offline micko

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Front end conversion RM125A
« on: June 08, 2018, 08:00:58 PM »
Bit confused, fitted my 250A front end into the 125A today, I want to use the 36mm forks - and read an article about it being a straight bolt on swap over they did back then - now the fork legs hit on the tank ???? any suggestions ? The 250A and 125B part # is the same for the bottom triple tree. 
Help appreciated
« Last Edit: June 08, 2018, 08:42:31 PM by micko »
RM370A RM250A RM125A RM125S YZ250A YZ125C XR75K4

Offline evo550

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Re: Front end conversion RM125A
« Reply #1 on: June 08, 2018, 09:14:59 PM »
Different steering stops.

Offline LWC82PE

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Re: Front end conversion RM125A
« Reply #2 on: June 09, 2018, 08:36:14 AM »
The reason the forks hit the tank is because the leading axle 250 triple clamps have less offset compared to the inline axle fork triple clamps on the 125. You will need to mod the steering stops on the triples and or frame and or shift the tank/seat back a bit.
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline micko

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Re: Front end conversion RM125A
« Reply #3 on: June 09, 2018, 09:51:55 AM »
Should be able to shift the tank back a bit,and play with the stops. nothing's ever simple. Cheers
RM370A RM250A RM125A RM125S YZ250A YZ125C XR75K4

Offline KTM47

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Re: Front end conversion RM125A
« Reply #4 on: June 11, 2018, 12:02:58 PM »
Is the steering head angle the same also.
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Offline micko

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Re: Front end conversion RM125A
« Reply #5 on: June 11, 2018, 01:15:35 PM »
little bit tighter steering angle from std
RM370A RM250A RM125A RM125S YZ250A YZ125C XR75K4

Offline LWC82PE

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Re: Front end conversion RM125A
« Reply #6 on: June 11, 2018, 05:54:45 PM »
The 250 has 60mm total offset (30mm in the clamps and 30mm at the axle). I think? the 125 inline axle forks have a 50 or 55m offset in the clamps.
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022