Suzuki Dirt Bikes Forum

i have a 99 rm 125. i took it camping last weekend and it would idle.i havent had any problems in the past. could it be because i mixed my fuel wrong. the only way it idles is when i feather the throttle.  

Are the idle and air screws adjusted correctly?
And what fuel mix are you running?  
- 1992 Suzuki RM 125
- 1979 Yamaha Townmate 80

i usually run 36:1 on gas and nothing has been adjusted since i road it last.i screwed them in and then turned them out 2 turns.i accidently ran it 50:1 that weekend though  

Yeah, that sounds about right. Although I usually run 32:1

Erm try this, warm the bike up (2-3 mins) and adjust the idle screw. See if this helps.  
- 1992 Suzuki RM 125
- 1979 Yamaha Townmate 80

fredricatbimmel:
i usually run 36:1 on gas and nothing has been adjusted since i road it last.i screwed them in and then turned them out 2 turns.i accidently ran it 50:1 that weekend though

This adjustment may work on the airscrew, but the idle screw is turned clockwise to increase idle. Once you have your idle set, further airscrew adjustment may be required for better off idle throttle response.  

it happen when u wear camping maby change in ure weather and stuff can affect that stuff  

Or how long since before you went camping...leaving gas in the float bowl has a nasty way of clogin jet holes....may just need to be cleaned...I had a similar problem with my 95 rm125 would never stay runing unless I feathered the throttle. I lived with it for about a year before I got the energy to take apart the carb and cleaned the jets in it real well (and installed the correct ones for my altitude) and now it idles like a champ.  

fredricatbimmel:
i usually run 36:1 on gas and nothing has been adjusted since i road it last.i screwed them in and then turned them out 2 turns.i accidently ran it 50:1 that weekend though

chud:
This adjustment may work on the airscrew, but the idle screw is turned clockwise to increase idle. Once you have your idle set, further airscrew adjustment may be required for better off idle throttle response.

Chud, Skip told me to adjust the airscrew correctly first, and then adjust the idle screw. Not idle screw and then airscrew...?  
- 1992 Suzuki RM 125
- 1979 Yamaha Townmate 80

There maybe a difference if you are using a tachometer.  

Hmmm, Good point... Maybe I'll let you and Skip deal with jetting issues.  
- 1992 Suzuki RM 125
- 1979 Yamaha Townmate 80

no tachometer and the jetting is correct. i did leave the gas in all winter and havent riddin it in a while.  

Bingo!!!!!  

looky there you just answered your own question  

i had this problem on my 2001 rm 125, on the choke top off the choke there is a round head that has arrows on a few turns off that and the bike idles perfect, it does say idle adjust if you look hard enuff hope this helps.

Ben