Oil to Gas Ratio...RMX250

[cdwallace]

Anyone know the ratio or know where I can find the correct ratio for the RMX250 - I'm thinking it's 32:1 but I'd rather be sure....thanks.

 

[oldfrt613]

32:1 is honky dory ( that is gas to oil not oil to gas) ;)

 

[apb]

The manual for my '90 RMX recommends 20:1, but almost nobody runs that much oil in the mix. I use 32:1 with good results; thats what I'd recommend.

 

[soniccascade]

32:1 definitely - I run the same in my 91RM250. I would recommend 91 or greater octane fuel too if you can.

 

[TimberPig]

The manual for my '90 RMX recommends 20:1, but almost nobody runs that much oil in the mix. I use 32:1 with good results; thats what I'd recommend.

The funny thing is that it says that for a 1990, then in like 91 or 92, all of a sudden the recommended ratio switched to 32:1. The difference in the motors is pretty much nil. 32:1 is plenty of oil, 40:1 is normally fine too. 20:1 will work fine if you rejet for it, but is more oil than needed. I agree, run it at 32:1, you won't hurt anything, and gives you lots of protection in terms of the lube provided to the motor.

 

[JBlinky67]

Run 40:1and rejet if necessary, and you'll be fine. I've never run lower than 40:1 in any 2-zinger I've owned.

 

[RM Deamon]

Run 40:1and rejet if necessary, and you'll be fine. I've never run lower than 40:1 in any 2-zinger I've owned.

Ditto :)