OzVMX Forum

Marque Remarks => Suzuki => Topic started by: Marc.com on November 28, 2010, 11:59:41 am

Title: Odd RM250 B frame and arm
Post by: Marc.com on November 28, 2010, 11:59:41 am
RM experts any thoughts on this one. Swing arm has me wondering

(http://i245.photobucket.com/albums/gg71/marcFX_photo/RMframe.jpg)
(http://i245.photobucket.com/albums/gg71/marcFX_photo/RMswinger.jpg)
Title: Re: Odd RM250 B frame and arm
Post by: oldfart on November 28, 2010, 12:26:27 pm
 what's with the bracing and holes......I get it - multi shock mount points :D
Title: Re: Odd RM250 B frame and arm
Post by: TM BILL on November 28, 2010, 02:12:06 pm
Arm looks like a modified A arm
Title: Re: Odd RM250 B frame and arm
Post by: Marc.com on November 28, 2010, 03:29:29 pm
its the bracing that has me interested, particularly the top of the swingarm forming top shock mount, never know when you are going to trip over something factory in Japan.
Title: Re: Odd RM250 B frame and arm
Post by: monaro308 on November 28, 2010, 03:36:42 pm
Another variation of Orange County choppers spider bike - The Black Dildo Bike.  :P :P :P
 
Looks like its had the chop where the bottom shock mount is.
It is a strange bit of arm though marc
Title: Re: Odd RM250 B frame and arm
Post by: number8 on November 28, 2010, 04:02:03 pm
Arm looks like a modified A arm


I would think Bill's on the money what are the forks like that came out of it do they go past the axle about 75mm or less.

#8
Title: Re: Odd RM250 B frame and arm
Post by: suzuki27 on November 28, 2010, 04:41:02 pm
I remember reading that bracing the A arm was pretty common- and recommended by the "Experts" back in the day to reduce flex.
Title: Re: Odd RM250 B frame and arm
Post by: Marc.com on November 28, 2010, 06:37:16 pm
Yeah but not something Joe average Japanese racer would do in the day..... and this work was done nicely
Title: Re: Odd RM250 B frame and arm
Post by: bazza on November 28, 2010, 07:21:52 pm
mark,went to the Puhoi tavern for a jar today and while at the puhoi cheese factory saw one of those....lol  Baz
Title: Re: Odd RM250 B frame and arm
Post by: TM BILL on November 28, 2010, 07:24:02 pm
What do you want it to be Marc  ???
Title: Re: Odd RM250 B frame and arm
Post by: Marc.com on November 29, 2010, 01:16:57 pm
What do you want it to be Marc  ???

Thought you were about to tell me I had discovered a super rare works frame in a Japanese junk yard, it must happen soon.  ;)
Title: Re: Odd RM250 B frame and arm
Post by: TM BILL on November 29, 2010, 01:53:41 pm
Id like to be wrong but i dont think much stuff made it back to Japan  ??? most of the  stuff from Europe ended up in the English channel along with the luftwaffe  ;D

Back to your frame though who knows  ??? could be a factory special  ;) any numbers on the frame , that arm looks like steel protoype of that pds  arm on your 125C .

Your in the hot seat  ;) what was the Japanese domestic mx scene like in the mid to late 70s ? ive seen videos of earlier times in japan, it was amping in the late 60s early 70s  :)
Title: Re: Odd RM250 B frame and arm
Post by: vandy010 on November 29, 2010, 02:14:37 pm
is there any way of identifying the metal used in the mod?
mild steel with the shit drilled out of it says to me a backyard bob style mod.
but if it's chromemoly or similar? then perhaps you do have something rare indeed...
Title: Re: Odd RM250 B frame and arm
Post by: oldfart on November 29, 2010, 06:03:50 pm
chrome moly was used on Suzuki production frames .....think it was around 1976
http://www.suzukicycles.org/photos/RM-RMX-series/RM250-brochures/1978_RM250_Aussales1b_840.jpg
Title: Re: Odd RM250 B frame and arm
Post by: Marc.com on November 29, 2010, 06:35:32 pm
Back to your frame though who knows  ??? could be a factory special  ;) any numbers on the frame , that arm looks like steel protoype of that pds  arm on your 125C .

Too true Bill, another Swingarm of the Gods perhaps. Though nothing I have ever seen is as cool as the swingarm on my 125C.

I like that the zig zag drilled out bracing that also forms the inside shock mount .... someone gave it some thought.... hell for $80 i may just buy it. The frame with all the bracing would look good chromed.  ;)
Title: Re: Odd RM250 B frame and arm
Post by: suzuki27 on November 29, 2010, 07:11:33 pm
That cut and weld in the mid-section is interesting.  It reminds me a bit of the first banana bend type swingarms on maicos etc . It doesn't look backyard at all.
Title: Re: Odd RM250 B frame and arm
Post by: brent j on November 29, 2010, 09:42:25 pm
It's a nice job but I wouldn't pick it as factory.

For a factory job I'd expect the swingarm to be bent then braced rather than cut and welded and I can't see any point to the plating around the shock mounts. I'd think the original triangulated tube would be stronger and lighter.

Still an interesting frame though

Brent
Title: Re: Odd RM250 B frame and arm
Post by: Marc.com on November 30, 2010, 10:14:20 am
I decided to grab it, cheap enough and looks like a bit of VMX history. have enough bits lying about to build it into bike.