Jump to content
Sign in to follow this  

mr12 jetting

Recommended Posts

From experience using the fuel in road racers I'll give you some tips.

The fuel runs much richer on the main than the pilot.

With u4.4 I went up 1 on the pilot and 1 on the main. Big increase in power.

With mr12 (which I haven't used in my 250f this is just advice based on my experience in road racers) I'd start with 1 up on the pilot and 2 on the main, then tune from there. Mr12 is amazing once you are tuned for it. Someday I'm going to grab 5 gallons to play with it in my 250f, I'm just not fast enough to justify it yet.

I hope someone that has actually used the fuel in a 250f chimes in as I am really curious as to how much more fuel we need using this stuff.

Hope I helped some!

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this