Posts
13
Joined
4/6/2010
Location
Compton, CA
US
Edited Date/Time
11/29/2015 2:28pm
Purchased one and wanted to get your thoughts on the 83 RM 125. Was it a popular bike back in 83? Did you like it or was it a down grade from the 81 and 82 versions?
Few questions:
1. Whats wrong with the shock? I push down on the seat and it springs right back as if there was no dampening at all. The shock was rebuilt with a new seal only four rides ago. Is a valve within the shock body clogged up? Bladder ruptured? I checked the pressure of the Nitrogen and it was over 100psi. Shock doesn't look to be leaking oil. Anyone have any ideas?
2. Any fix on the forks? The rear suspension is awesome but the front forks are soft and mushy.
3. Would the 83' motor fit in the 85' chassis? I have a 85' RM 125 and the motor is a worthless piece of &^%$ but the chassis is awesome. The 83' has a worthless chassis but a killer motor.
One thing I hate about this bike is the damn seat. Seems to be a huge space between the seat and gas tank that makes riding uncomfortable because I seem to get my legs and crotch caught up in that space.
Thanks for the help.
Few questions:
1. Whats wrong with the shock? I push down on the seat and it springs right back as if there was no dampening at all. The shock was rebuilt with a new seal only four rides ago. Is a valve within the shock body clogged up? Bladder ruptured? I checked the pressure of the Nitrogen and it was over 100psi. Shock doesn't look to be leaking oil. Anyone have any ideas?
2. Any fix on the forks? The rear suspension is awesome but the front forks are soft and mushy.
3. Would the 83' motor fit in the 85' chassis? I have a 85' RM 125 and the motor is a worthless piece of &^%$ but the chassis is awesome. The 83' has a worthless chassis but a killer motor.
One thing I hate about this bike is the damn seat. Seems to be a huge space between the seat and gas tank that makes riding uncomfortable because I seem to get my legs and crotch caught up in that space.
Thanks for the help.
2. Forks you can make them work ok by installing stiffer springs and Race Tech emulators in the forks. Mine went from soft and almost unridable to pretty decent. However keep in mind these are still 38mm forks so you are going to have a lot of flex.
3. I am not 100% positive but I think it might fit. Really though if you are ok riding the '85 and don't care about the legality of having a front disc brake, then I would just send the '85 motor out to Eric Gorr or someone for motor work.
Lastly, yes you can get a safety seat conversion for the '83 as already stated.
I have a 84 RM 125 that's complete and runs it has 43 mm forks and a double leading front brake that's a great upgrade you can have the whole bike for $ 275.00
I also rebuild floater shocks and do other work engines,wheels etc...
Also I own www.cyclestopracing.com
You can send me a PM I don't live too far from you.
The Shop
http://lasvegas.craigslist.org/rvs/1697429982.html
http://www.onthepiperacing.com/gallery2/main.php?g2_itemId=5418
Pulled the shock apart and the piston seal and oring where broken into pieces and floating in the oil. Seal head must be worn too because the shaft had some side to side play.
Previous owner must have changed the oil and charged the nitrogen.
My big problem is the shock body is WORN! It's a 40mm bore and it measured 40.6mm. OMG!
I plan to machine my own shock body from 7075 aluminum unless someone has one to sell in perfect condition. I'm tired of battling these Evo shock bodies. Every shock I bought for my previous bikes seems to be trash. Need to buy three off ebay to find one good one.
Works performance has brand new shocks, $700 dollars. Sounds pricey but by the time you buy the seal, piston assembly, bladder, rebuild, you have already spent 400 dollars. I just don't have the money to spend.
Is the 84 RM 125 shock the same as the 1983?
The body is swollen and junk.
All 81-86s interchange
Pit Row
http://www.onthepiperacing.com/gallery2/main.php?g2_itemId=25704
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