Rm 125 swinging arm

[craigclayton]

I've noticed on ebay someone selling an RM 125 b optional alloy swinging arm, can any of you suzuki experts tell me if it is genuine, to me it looks like it's off a C.
Cheers

[John Orchard]

he he; here we go  ;-)

It doesn't have the brake-stay arm mount, I'd say it's a 'C' arm.

Is that a crack running through the weld in one of the pics?

[craigclayton]

Yes the one with the crack, looks to me the way its siting flat it doesn't have the brake stay mount?

[Krikey]

That's a Rm125C swing arm and not a B one as it does not have a brake stay mount. The 3rd pic is the bottom of it. It's definitely a C arm

And with that crack it's scrap alloy only

[craigclayton]

Thanks for the confirmation, I'll just have to keep looking
Cheers C

[Ted]

Craig, Do you have a swingarm for your B?

[craigclayton]

Hi Ted, yes I have the original steel arm but have been looking for an optional alloy arm for a while. People tell me they do come up for sale but I am yet to find one 
Cheers c

[Ted]

I know of a guy with a brand new Suzuki alloy arm with the brake stay fitted from the factory. Would you be interested in it?

[craigclayton]

Hi Ted, much as I would like to say I was interested I'm sure it would and should command a high but fare price for the wright buyer. I think some one building a a showroom bike the price would be fare and wright but I am (very slowly) building a bike to do my best and on a lucky day finish mid pack at a local race so to me and my not so perfect bike the price would be too high. I thank you for trying to help but will keep on looking  (fingers crossed)for a used one.
Thank you and cheers C

[crs-and-rms]

i would be intrested in the swingarm

[KTM47]

Its funny isn't it.

I always thought the RM125B option alloy swing arm was only permitted to be used if it was a genuine one.  Also note these swingarms were also available and used in 250 & 370Bs too.

Anyway has anyone read the latest VMX Magazine.  Apparently you can use a converted 125 C (C not C2) swingarm on a TT500 Yamaha in Pre 78.  Its all there in black and white.

[LWC82PE]

Not sure how that is allowed? There is no 125 C2 anyway. I could understand a steel RM250C arm being allowed because it was also used on the 77 PE250, but there are several arms listed for PE-B RM-C but it seems to be just a chain tensioner mount difference and its a bit of a grey area as as to when the updated one came along and was shipped on PE250B's. Some could possibly argue that even the 250C arm might not be passable. I don't know how you could prove when the initial PE250B swinarm was superceeded by the RM250C swingarm with the spring loaded tensioner. Sometimes i think its too hard to prove or disprove these sorts of things these days. No one knows, no one remembers exactly, but the alloy C/C2 arms are an obvious no for pre 78, to me anyway.

What issue of VMX is that in? The latest one i have has got the SP511 on the front.


This one could probably be allowed if you could prove when the PE250B was being shipped with this eg before dec 31 1977

Part # = 61100-41850-019
Part Description = SWING ARM ASSEMBLY,REAR
Model Count = 3
PE250B 1977 246 PE250 DUAL PURPOSE
PE250C 1978 246 PE250 DUAL PURPOSE
RM250C 1978 246 RM250 OFF ROAD


This one probably should not be allowed

Part # = 61100-41880-019
Part Description = SWING ARM ASSEMBLY,REAR
Model Count = 1
RM250C 1978 246 RM250 OFF ROAD


This one also probably should not be allowed

Part # = 61100-41881-019
Part Description = SWING ARM ASSEMBLY,REAR
Model Count = 1
RM250C 1978 246 RM250 OFF ROAD


There should be no issues using this one

Part # = 61100-41841-019
Part Description = SWING ARM ASSEMBLY,REAR
Model Count = 3
PE250B 1977 246 PE250 DUAL PURPOSE
RM250B 1977 246 RM250 OFF ROAD
RM370B 1977 372 RM370 OFF ROAD

[KTM47]

What issue of VMX is that in? The latest one i have has got the SP511 on the front.

Check your news agent.

[shelpi]

what exactly is differant between the B and C swingarms other than the brake stay?

[LWC82PE]

125B - Steel
125C - Alloy

250B - steel
250C - steel
250C2 - Alloy