Author Topic: RM125B forks Wanted  (Read 832 times)

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Offline micko

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RM125B forks Wanted
« on: May 01, 2018, 03:30:16 PM »
and triple clamps - worth a try, must be good nick
RM370A RM250A RM125A RM125S YZ250A YZ125C XR75K4

Offline Slakewell

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Re: RM125B forks Wanted
« Reply #1 on: May 01, 2018, 04:55:26 PM »
I have PE ones that are more or less the same, unless your racing for top spots in pre 77 class they be fine.
Current bikes. KTM MC 250 77 Husky CR 360 77, Husky 82 420 Auto Bitsa XR 200 project.
Kawasaki A4 125 78 for sale

Offline micko

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Re: RM125B forks Wanted
« Reply #2 on: May 01, 2018, 06:44:08 PM »
building it up for my son to take to the nats later this year, do they have the overhang and what year
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Offline LWC82PE

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Re: RM125B forks Wanted
« Reply #3 on: May 02, 2018, 01:12:03 PM »
I have PE ones that are more or less the same, unless your racing for top spots in pre 77 class they be fine.

They are totally different, only common parts are the seals and fork boots really. Might??? be ok at a local club race but the 78-79 PE ones certainly will not be at Nats as they are off later models and the parts are not the same anyway.

For 125b forks you need to find the ones with these numbers cast near the axles holes on the sliders  X3363L and X3363R and they measure 295mm from the axle hole to the top of the slider. In totally stock form they do not need restricting to 9" either. Don't be fooled in to thinking RM250C (alloy tank model) forks are the same or close enough either.
« Last Edit: May 02, 2018, 01:23:55 PM by LWC82PE »
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline micko

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Re: RM125B forks Wanted
« Reply #4 on: May 02, 2018, 03:18:18 PM »
thanks for that info, appreciated
RM370A RM250A RM125A RM125S YZ250A YZ125C XR75K4

Offline Slakewell

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Re: RM125B forks Wanted
« Reply #5 on: May 02, 2018, 05:57:25 PM »
Sounds like the PE forks are off the list if your son is riding the nats.
Current bikes. KTM MC 250 77 Husky CR 360 77, Husky 82 420 Auto Bitsa XR 200 project.
Kawasaki A4 125 78 for sale

Offline micko

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Re: RM125B forks Wanted
« Reply #6 on: May 06, 2018, 01:22:57 AM »
Looking that way, gotta keep within the rules
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Offline Oldfart

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Re: RM125B forks Wanted
« Reply #7 on: May 06, 2018, 07:27:18 AM »
early Yamahas ran the same forks .... just different triples

Offline LWC82PE

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Re: RM125B forks Wanted
« Reply #8 on: May 06, 2018, 03:49:12 PM »
They are similar. I am not sure what travel they have

https://www.ebay.com/itm/1977-77-Yamaha-YZ125-YZ-125-Front-Forks-Suspension/401409950827?hash=item5d75e5c46b:g:aH4AAOSw~jpZxaDT

i suspect the axle holes are 15mm though
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline motomaniac

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Re: RM125B forks Wanted
« Reply #9 on: May 06, 2018, 09:34:13 PM »
the yz forks don't have as much slider below the axle.

Offline micko

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Re: RM125B forks Wanted
« Reply #10 on: May 08, 2018, 11:52:24 AM »
ok, so I tracked a pair down in the US. Guy claims he personally pulled them out of a RM125B but they don't have those numbers stamped (only have NN stamped) waiting for him to confirm the 295mm measurement, any other way to tell ?
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Offline LWC82PE

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Re: RM125B forks Wanted
« Reply #11 on: May 08, 2018, 12:42:36 PM »
I have seen bikes with incorrect forks on them.  Sent you a PM
Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline micko

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Re: RM125B forks Wanted
« Reply #12 on: May 08, 2018, 12:54:11 PM »
sent you some photos via email, cheers
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Offline micko

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Re: RM125B forks Wanted
« Reply #13 on: May 28, 2018, 01:47:13 PM »
Got to do your home work, as the seller said he personally pulled them out of the 125b himself. Ended up being RM400 forks lol
Lucky I asked lots of questions
RM370A RM250A RM125A RM125S YZ250A YZ125C XR75K4