Author Topic: RM125S questions for the Guru's  (Read 15420 times)

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Offline bazza

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Re: RM125S questions for the Guru's
« Reply #15 on: January 12, 2015, 10:59:22 AM »
https://www.facebook.com/groups/444737422335541/
scroll down 5-6 photos to see nice restored suzuki 125
Once you go black  you will never go back - allblacks
Maico - B44 -1976 CR250- 66 Mustang YZF450,RM250
Embrace patina

Offline OverTheHill

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Re: RM125S questions for the Guru's
« Reply #16 on: January 12, 2015, 11:27:04 AM »
had a genuine RM125S once, traded it on my year old YZ250C [airbag fork model], got more enjoyment out of 'that' bike than the 250 despite breaking the end off the crank [at the LH main], magnets grabbed the rotor in full flight which was fun when landing with a dead engine. Spent some time looking for spark lol. Big carb & big porting, great aircleaner set up. Another one i shouldn't have sold damn it.

Offline dodgee

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Re: RM125S questions for the Guru's
« Reply #17 on: January 12, 2015, 07:13:17 PM »
I had both M & S nos barrels , the only difference that i could see was the M had one more cyl fin at the rear , where the S had it removed to fit the adaptor for bigger carby.

oldfart

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Re: RM125S questions for the Guru's
« Reply #18 on: January 12, 2015, 07:56:03 PM »
125 M carb  VM 28SS   Id # 28720      Timing  3.8mm
125 S carb  VM 34SS   Id  #41700       Timing  2.20mm

Offline Tim754

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Re: RM125S questions for the Guru's
« Reply #19 on: January 12, 2015, 08:34:14 PM »
Top two piccies show difference in M swing arm, the rest show parts only on S model.







« Last Edit: January 12, 2015, 08:36:55 PM by Tim754 »
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Offline Doc

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Re: RM125S questions for the Guru's
« Reply #20 on: January 12, 2015, 08:57:02 PM »
I had both M & S nos barrels , the only difference that i could see was the M had one more cyl fin at the rear , where the S had it removed to fit the adaptor for bigger carby.


thanks dodgee.. basically the same is what I figured. Too lazy to get out the verniers ;)

thanks to everyone for all the reference fodder also ;)

Offline oldyzman

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Re: RM125S questions for the Guru's
« Reply #21 on: January 29, 2015, 08:36:37 PM »
I like the RM "S"
Brett
I have a soft spot japanese mxers with aluminium tanks. Two stroke classic Dirt Track...

Offline 80-85 husky

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Re: RM125S questions for the Guru's
« Reply #22 on: February 03, 2015, 09:44:49 PM »
ol mate got a job at b15 and left school. with his second pay packet he bought a 2nd hand montessa 125~ about a 73 I rekon. it went exactly 100 metres and exploded. in disgust and embarrassment, he got a loan and bought a new rm 125 s. what a machine for a bunch of kids on dax's and kwaka 75's...agi 100 yammies etc. great bike. he never raced it and dropped out of bikes after his first headj@b

albrid-3

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Re: RM125S questions for the Guru's
« Reply #23 on: February 04, 2015, 07:28:20 AM »
ol mate got a job at b15 and left school. with his second pay packet he bought a 2nd hand montessa 125~ about a 73 I rekon. it went exactly 100 metres and exploded. in disgust and embarrassment, he got a loan and bought a new rm 125 s. what a machine for a bunch of kids on dax's and kwaka 75's...agi 100 yammies etc. great bike. he never raced it and dropped out of bikes after his first headj@b

Now that was funny.

Offline pmc57

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Re: RM125S questions for the Guru's
« Reply #24 on: February 04, 2015, 11:22:28 PM »
Here's a trio of the little monsters at last years CD10

Offline 80-85 husky

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Re: RM125S questions for the Guru's
« Reply #25 on: February 06, 2015, 08:04:14 AM »
that first hdjob destroyed a lot of promising riding careers.... ;D ;)

Offline Tim754

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Re: RM125S questions for the Guru's
« Reply #26 on: February 06, 2015, 12:42:07 PM »
And yet the Suzuki parts books I have appear to list no different barrel between the two ?????? I better look harder ???
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oldfart

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Re: RM125S questions for the Guru's
« Reply #27 on: February 27, 2015, 08:20:33 PM »
It's not very often you get to  see 3 nice clean Rm 125 S sitting next to each other.

Offline John Orchard

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Re: RM125S questions for the Guru's
« Reply #28 on: December 12, 2022, 09:44:53 PM »
Ok draggin-up an oldie but subject matter was not completed.

RM125M cylinder 12110-41001
RM125S cylinder  12110-41002

I just got an American listing for their kit '75 RM125's. If you find a 12110-41002 listed anywhere, check on the actual description, American Suzuki have the description wrong, it is listed as a TM125 piston.

I actually just bought a piston off ebay, listed for a TM125, not using the above number but it did have two part numbers on the box (12110-41731 & 12110-28753, the latter number is the kit piston for the S, all websites list it as a TM125 piston), it was $12, it arrived today, it is a kit 'S' piston, with .6mm ring grooves, obviously the dealer kind of knew it would not fit a TM (although it will with .6mm rings).

So, I now have the part number for RM125S piston rings, again, American Suzuki have the description wrong, they are listed for TM125 ! but I figure the ebay selling dealers might know they won't work on a standard TM piston but they don't know what, so they are super cheap, I just bought a set for $10 :-)
« Last Edit: December 12, 2022, 09:49:43 PM by John Orchard »
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Offline sleepy

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Re: RM125S questions for the Guru's
« Reply #29 on: December 13, 2022, 11:08:53 AM »
I just had a look in my RM125 M,S,A&B parts book and the 11210-41001 part number is before frame number 18508 and the other note says for the 002 barrel use 13125-28701 inlet gasket. In the back of the book there is a section for parts that are different for the "S" and the barrel isn't mentioned. The only things different are the Carb, airbox, piston(12110-41730), pipe and CDI bracket and wiring. Rings as well 12140-28740.
Happy to scan the "S" pages and send through if you want.
I've heard people say the S barrels were hand ported in the factory and the couple of S barrels I've seen did have the inlet port cleaned up pretty well but the parts book doesn't show it as a different part so without having an original M and S side by side I can't say. Could have been that part way through the M series the S barrel became fitted.