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Old 01-07-2010, 12:21 PM
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Location: South Africa
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Default My 1984 RM125 project

Picked this bike up yesterday 06.01.10
had to chase around abit for it, I am in south africa
its a +-1984 (pretty sure it is 84) RM125 - would be great if guys could help me discover what year model it exactly is..
needs a motor!! and many other bits and piece, not to sure what condition the other stuff is in as this is my first bike, i am a car man
i want to build the bike to jump, when i was younger i use to love jumping bmx, but now i wana take it to the next level! also to ride around my small holding etc, i am weighing at about 95kg, will drop about 5-8kgs though soon. not sure on suspension setup but want to jump this thing BIG! and go mad in surrounding bushes/forrests
this is how it looks..

would be great to hear from guys who have done same or similar project or know there stuff! - as i am bike clueless! bt one thing i wana do is convert front to discs!! and make sure suspension is running PERFECT for what i am gna use it for
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Old 01-07-2010, 09:17 PM
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Ebay will be your friend.
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Old 01-15-2010, 04:07 PM
chillywilly's Avatar
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Yea pretty sure it is an 84-85, as i have two of them that look the same (engine less)
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Old 01-15-2010, 06:46 PM
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Depending on what you mean by going "BIG", I recommend you strip the
bike down to the frame then media blast it so you can check the integrity
of all the welds. If the stock welds look good, you should add additional
gusseting around the rear shock mount, frame/headstay area and footpeg
mounting brackets. The shock and fork will need to be dismantled and set
up with stiffer springs and valving. Finally, I would buy a set of Excel or
DID ST-X rims and heavy duty spokes. The problem is, even after you drop
5-7 Kilos, you are still talking about a rider at 210-220 lbs (with gear) on a
tiddler designed for 145 lbs. If you were just going to putt around a vintage
MX track at average speed, you could probably get away with it. However,
If you blast off on a 60 foot double and land a little long, the bike could fold
up if you don't reinforce it.

Converting the front drum to disc will be a challenge. You will need to
replace the front forks to get the correct lugs to mount the brake caliper.
Then you will need the master cylinder and front brake hose along with a
different hub and spacers with the correct offset to line up the rotor with
the caliper and hope the axle is the right diameter. Probably the easiest
way to accomplish this, would be to find a complete front end from a disc
equipped bike - everything from the triple clamps to the wheel.

I don't know how difficult it will be to find a new motor, maybe one of the
Suzuki experts here can chime in.

If you can swing it, I would bag the tiddler and opt for a 250 or 500 for two
reasons. Already designed for someone your size and you can go a lot

Whatever you decide, good luck with it.

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Old 01-16-2010, 07:14 AM
ThePipe's Avatar
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Location: Wisconsin
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Slide any 1985-89 RM125 or 1985-88 RM250 Front end in those 84 Clamps and your Disc project will be complete.
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Old 01-16-2010, 07:22 AM
OLDMXRACER 393's Avatar
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I was going to say just about what you told him Dogger when he first posted this.

DKSA, you will spend enough dollars finding/rebuilding an engine and just getting that RM in rideable that you could buy a nice, used, ready to go modern 250. I'm allso with Dogger in that if you want to go vintage racing, it's a fine choice. An everyday rider? Not so good a bike.

And since this is your first bike, how "big" do you think you're really gonna go? Watching jump videos and actually trying do what you see are two different things. Be careful......
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Old 01-16-2010, 08:03 AM
SabMotocross's Avatar
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Definitely "ditto-what-dogger" said! Nice find though....patience is the key here!
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