Suzuki RM-125 1992 'USA' restoration

Mike P.
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Mike P. 3/6/2016 6:07am
3/6/2016 6:07am
Really nice job and thanks for sharing your ride. Also, I had no idea Finland had indoor motocross tracks, that's awesome! Next time my wife and I visit her family in Finland I have to check one of these indoor tracks out. Again great job on your bike and thanks for sharing!
Slingshot92
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Slingshot92 3/6/2016 9:52am
3/6/2016 9:52am
As far as I know, we have four indoor mx parks here in Finland:

Dynaset Offroad areena:
https://www.youtube.com/watch?v=UzynV31V7Nw

TMK Tietokeskus center:
https://www.youtube.com/watch?v=Sa7zJwsR0t4

TSMU Extreme areena:
https://www.youtube.com/watch?v=MHL2cFd_8LU

Imatra offroad areena:
https://www.youtube.com/watch?v=ApCtNFx1WTc

The Shop

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Slingshot92
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Slingshot92 4/16/2016 4:38am
4/16/2016 4:38am
Works Connection frame guards. Found them brand new. 24 years old. Smile











Slingshot92
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Slingshot92 4/16/2016 4:49am
4/16/2016 4:49am
Boyesen Rad Valve and upgrading from 36mm to 38mm Mikuni carb.





Mixon848
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Mixon848 5/10/2016 6:04pm
5/10/2016 6:04pm
Slingshot92 wrote:
New radiators arrived. [img]https://p.vitalmx.com/photos/forums/2015/07/09/97254/s1200_WP_20150710_08_57_22_Raw.jpg[/img]
New radiators arrived.


Which brand radiators are these that you chose to go with?

Thanks
Slingshot92
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Slingshot92 10/16/2016 8:32pm
10/16/2016 8:32pm





VHM head installed. Also cylinder ported, Arrow works pipe / muffler, RM250 carb, Boyesen Rad Valve. Air box modified for better air flow in.
reynardfan1
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reynardfan1 10/19/2016 8:38pm
10/19/2016 8:38pm
any idea where to get a replica seat cover?
Slingshot92
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Slingshot92 10/19/2016 8:44pm
10/19/2016 8:44pm
From Mastercross, Italy.
L.D.
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L.D. 12/30/2016 6:15am
12/30/2016 6:15am
How did you go with the PKW 38 carburettor, was their any other modifications you had to make so it didn't bog?
I also just started a resto any advice on obtaining OEM parts. Cheers Shane
Slingshot92
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Slingshot92 12/30/2016 11:52am
12/30/2016 11:52am
L.D. wrote:
How did you go with the PKW 38 carburettor, was their any other modifications you had to make so it didn't bog? I also just started...
How did you go with the PKW 38 carburettor, was their any other modifications you had to make so it didn't bog?
I also just started a resto any advice on obtaining OEM parts. Cheers Shane
There is a Suzuki Factory team guide how to do it. Here's the article:





Banana_oil
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Banana_oil 12/30/2016 2:48pm
12/30/2016 2:48pm
Slingshot92 wrote:
Works Connection frame guards. Found them brand new. 24 years old. :) [img]https://p.vitalmx.com/photos/forums/2016/04/16/131984/s1200_1.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131985/s1200_2.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131986/s1200_3.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131987/s1200_4.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131988/s1200_5.jpg[/img]
Works Connection frame guards. Found them brand new. 24 years old. Smile












Very nice build, nice to add parts subsequently as they come Smile

Are you sure the right frame guard is mounted correctly? Looks like it should be turned 180 degrees with the logo part covering the master cylinder?
MaxPower
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MaxPower 12/30/2016 3:22pm
12/30/2016 3:22pm Edited Date/Time 12/30/2016 3:23pm
Great work.
Restoring a bike to your own vision brings a personal satisfaction that i never had with anything else. The part that made it pure for me isn't other peoples comments but my own opinion. How good it ran helped too
How does your RM work with the suzuki mods done to it? I would think it rips
L.D.
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L.D. 12/31/2016 6:08am
12/31/2016 6:08am
Awesome cheers mate. I really enjoyed your build. No doubt I will have further questions during my build. Cheers
Mike P.
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Mike P. 1/2/2017 2:31pm
1/2/2017 2:31pm
Regarding that 38MM carb upgrade "LD" asked about, I did this mod back in 2015 and there were signficant gains when coupled with a VForce reed, but as I am older now and not so light (nowhere near the 150lbs I should be for riding a 125, I did the 144 big bore kit on my 90 RM125 and it made a significant difference (no replacement for displacement), so if you no longer fit the weight range then I highly recommend the 144cc kit coupled with the 38mm carb...unbeliveble gut and the overev is not bad either....
Slingshot92
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Slingshot92 1/2/2017 11:35pm
1/2/2017 11:35pm
Mike P. wrote:
Regarding that 38MM carb upgrade "LD" asked about, I did this mod back in 2015 and there were signficant gains when coupled with a VForce reed...
Regarding that 38MM carb upgrade "LD" asked about, I did this mod back in 2015 and there were signficant gains when coupled with a VForce reed, but as I am older now and not so light (nowhere near the 150lbs I should be for riding a 125, I did the 144 big bore kit on my 90 RM125 and it made a significant difference (no replacement for displacement), so if you no longer fit the weight range then I highly recommend the 144cc kit coupled with the 38mm carb...unbeliveble gut and the overev is not bad either....
Instead of VForce reeds I would buy Boyesen Rad Valve.

Pit Row

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Paul333
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Paul333 1/3/2017 9:06pm
1/3/2017 9:06pm
Slingshot92 wrote:
Works Connection frame guards. Found them brand new. 24 years old. :) [img]https://p.vitalmx.com/photos/forums/2016/04/16/131984/s1200_1.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131985/s1200_2.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131986/s1200_3.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131987/s1200_4.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2016/04/16/131988/s1200_5.jpg[/img]
Works Connection frame guards. Found them brand new. 24 years old. Smile











eBay?

I am looking for them as well but so far have not had any luck.
Mike P.
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Mike P. 1/3/2017 9:39pm
1/3/2017 9:39pm
I probably will try the Boyesen Rad Valve at some point just to compare the differences, but there is another reed cage that works really well (at least on the bikes I've used it on...roughly 4 different bikes) and that the Mossbargar). It's an 8 petal reed that I used a few years ago when I was racing nationals (throttle response was unabelivable). They cost around $130 USD. I have not tried them on my 1990 RM125 but will do a comparison with them against the Rad Valve & VForce3 at some point. I recently installed the Mossbargers on my RZ500 but just haven't had time to jet it out (if ever a bike needed better throttle response these old RZs do). But the results on my 90 RM will likely be different as I have an Eric Gorr 144cc big bore kit on my bike and the gains are just unbelievable when I compare it to the bike when it was a 125.






Dakotasxt5spd 4/16/2017 5:19pm
4/16/2017 5:19pm
Slingshot92 wrote:
Few more new OEM parts installed: [img]https://p.vitalmx.com/photos/forums/2015/05/22/91948/s1200_WP_20150522_21_01_58_Raw.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91949/s1200_WP_20150522_21_03_12_Raw.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91951/s1200_WP_20150522_21_04_09_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91952/s1200_WP_20150522_21_05_04_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91953/s1200_WP_20150522_21_05_38_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91954/s1200_WP_20150522_21_05_38_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91955/s1200_WP_20150522_21_13_11_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91956/s1200_WP_20150522_21_41_30_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91957/s1200_WP_20150522_21_42_09_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91958/s1200_WP_20150522_21_43_29_Rich.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91959/s1200_WP_20150522_22_11_05_Raw.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2015/05/22/91960/s1200_WP_20150522_22_56_02_Raw.jpg[/img]
Few more new OEM parts installed:
























Hey, I just got a 92 myself!!! What's the part number on the chain slider??? I can not find an aftermarket!!!! And I may need some help with this if you can guide me lol, it was a roller when I got it!
Slingshot92
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Slingshot92 4/17/2017 1:03am
4/17/2017 1:03am
Dakotasxt5spd wrote:
Hey, I just got a 92 myself!!! What's the part number on the chain slider??? I can not find an aftermarket!!!! And I may need some...
Hey, I just got a 92 myself!!! What's the part number on the chain slider??? I can not find an aftermarket!!!! And I may need some help with this if you can guide me lol, it was a roller when I got it!
It is this one but you need to modify it to make it fit:
http://www.dirtbikebitz.com/acerbis-chain-guide-suzuki-rm125250-07-14-y…
Dakotasxt5spd 4/17/2017 5:52am
4/17/2017 5:52am
Ok thanks!!!! Here's mine so far. I'm missing bolts and motor mounts and a bunch of things lol. When you did the swing arm and linkage bearings, did the kit come with new spacers too???










triggered_retard 6/24/2017 3:07pm
6/24/2017 3:07pm
Slingshot92 wrote:
[img]https://p.vitalmx.com/photos/forums/2015/05/21/91843/s1200_WP_20150521_21_55_13_Raw.jpg[/img]




What is the part number for the airbox lid? I can’t seem to find one.
Slingshot92
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Slingshot92 6/26/2017 10:55am
6/26/2017 10:55am
Slingshot92 wrote:
[img]https://p.vitalmx.com/photos/forums/2015/05/21/91843/s1200_WP_20150521_21_55_13_Raw.jpg[/img]




triggered_retard wrote:
What is the part number for the airbox lid? I can’t seem to find one.
The part number for the air filter box hood is 13741-27C10-000
Try www.partzilla.com or www.cmsnl.com
I bought mine via local Suzuki parts dealer.

BR,
OP
Schwanz22
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Schwanz22 6/26/2017 12:37pm
6/26/2017 12:37pm
That's awesome!!! Bike looks great!
Xracer
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Xracer 7/3/2017 10:51am
7/3/2017 10:51am
Bike looks great. I'm building an 89' for VMX with a 92' cylinder that Eric Gorr did the 144 mod and some mild port work. The power valves that came with the bike are junked and replacements are hard to come by. What do you know about year-to-year parts interchangeability as far as the power valves / guides go? Do you happen to have any suggestions on where I can find them? Ebay is hit-or-miss...
Ayden_Locklear 1/1/2018 7:10pm
1/1/2018 7:10pm
I love this. I’m doing a rebuild on a 1992 rm 125 as well and I have a couple questions. Where did you get the radiators. The ones the dude who I bought the bike from gave me almost fit but mine on the side where the cap is, the little nozzle that comes out was in the wrong place. And also how much were they. Thanks for reading my huge paragraph lol.

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