Posts
46
Joined
2/10/2016
Location
GB
Edited Date/Time
12/21/2021 12:56am
Hello Everyone,
Just bought one of these to restore, It's in pretty rough shape.I seem to remember them having reliability issues back in the day with pistons/powervalves and cranks.Does anyone know what the issues were and how to prevent them and how do I make it as fast as an 89 CR ?
Thanks
Just bought one of these to restore, It's in pretty rough shape.I seem to remember them having reliability issues back in the day with pistons/powervalves and cranks.Does anyone know what the issues were and how to prevent them and how do I make it as fast as an 89 CR ?
Thanks
Also the crank seal should be replaced with that of the 1988 Suzuki RM125.
As far as making it a CR125 beater many will "lie" and say it can't be done having never raced one. It can and it takes:
FMF or DG Pipe (the Pro Circuit Pipe for these bikes weren't good)
FMF Ram Valve or Boyesen RAD Valve
If you are fast enough to keep the motor singing (fast Intermediate or Pro) then throw on a 38mm Carb. It is a tight fit but it works.
You don't need porting to make them scream.
Enjoy that bike. They are fun.
As stated above they where great bikes, they would be on the pipe and down a straightaway before the Honda came on the pipe.
I did hear there was a crankshaft problem. Does anyone know about this?
Thanks Tim
The Shop
The 1989 gets air leaks at the Crank Seals. If jetted lean and you get a leak, you are siezing for certain. Also watch for the bike using up tranny fluid. Just check it a little more frequent than other bikes you have or have had. The oil blows out of the relief tube by the Power Valve.
People said these things were slow, and with the Stock pipe and Silencer and Reeds they were. But my Trophy Case has a lot of Trophy's, Pins and Ribbons do to the 1989-1991 Suzuki RM125's. With the 1991 being my favorite and I am currently building one from the Frame Up.
-89 was also more tricky to maintenance since -91 was the first model with a separate clutch cover.
This is what Suzuki France did to their bikes in 1989. Enjoy!
First page was translated. I've tried to make it as clear as possible. Just wait until I get the second part done.
Pit Row
I did a list of every single 1989, 1990, 1991 and 1992 exhaust pipe for sale through out the world in my group on facebook. They are out there you just have to be willing to put in the same amount of time that you put in daily for your employer finding them.
I did break a few frames under the foot pegs, I would watch for that.
My 89's
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