race gas

going to raise the compression with a Phathead head on cr250. What type of race gas do people use. thanks

VP racing fuel 114

chevron with techron regular

I like Citgo 110 or in a pinch I'll use Turbo Blue

I've heard of a loss of power w/the use of race fuel. Don't use it unless you have to.

I use 93/MC1.

There's more about race gas in here that you can read in a month. Maybe give VP a call they have numerous choices. I personally have tried Ultimate 2, MR2, and C12. The leaded oxygenated fuels like the MR2 were difficult for me to get jetted correctly, but everyones situation is different.

Vp C12 and if your not getting to crazy with the compression you can mix it 1:1 with pump prem. and save a few $$

I prefer Klotz 113 leaded and mix 30/70 with pump premium.

VP U2 for me! I have used C12, and MR2 in the past, but currently use U2. It is more work due to jetting, flushing, stinking up the gararge, and being expensive.... but I still love it! Once set up properly, it is worth the loot and extra work in my opinion.

As mentioned before, use the miminum ocatane that your ride needs, and jet accordingly and you will be set.

Best of luck!

Create an account or sign in to comment

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

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By Yamaha0963
      So I started my bike today and a lot of smoke came out from where the hoses clamp on the carb (both sides) where the air boot meets the air box, and where the pipe meets the cylinder. I can also hear a leak but I am not sure from where. It also bogs. What could this be??! I started it yesterday and it ran fine, no leaks, no smoking, bike revved up good and everything.
      i should point out that I did take the carb off, disconnected the air boot from the air box. I put some grease on the air boot so it would seal against the air box when I put it back together, it was a pain in the a$$ installing the carb but I made sure that the hoses clamp all around the carburetor. After I was done I started it and it was completely fine, no issues. 
      What do do you guys think? Thanks
    • By Yamaha0963
      Hey so I have a Cr250r with a few mods
      -PC pipe 
      -Vforce reeds
      -Keihin PWK carb
      I was wondering what race gas I should use, I am a weekend rider and I do not race or anything like that, I just want to use some race gas on my bike so it runs better. (Don't want to run straight up pump gas)   I am looking to mix with 93 pump gas because running straight up race gas is too expensive for me.  What gas would be good for me that is not too expensive. Thanks!
    • By Yamaha0963
      Hey guys, so I recently bought a 02 cr250r on Craigslist.  The guy claims it has a new oem cylinder and piston with 30hrs and a new crank with 60hrs.  The bike also has a PC pipe, vforce reeds, keihin pwk. 
      Now my question is are they so easy to start?! My last bike was a yz250f and it had quite a bit of resistance when going through the compression kick and I got used to it.  When I went to start the cr250 I went through the compression kick out of habit and notice that the kick starter would drop under the wait of my leg and it was awkward for me as I was used to starting a 4t.  The bike started first kick cold with choke on and after warming it up it still started first kick.  Is it normal for the kick starter to drop under the weight of my leg or does it have low compression? Like I said it start first kick very easily.  The guy had 50/50 race gas and 93 pump gas at 40:1 (don't know about the premix) in the tank but I will be running 93 pump gas with stabil at 40:1 with Maxima super M (can't afford race gas) when I need to refill.  I will update when I start running my gas and see if it still starts the same. Thanks!
    • By Roman Krzyzanowski
      I have a 2000 Cr125r and I’m in the middle of rebuilding it I just put a new crank and new bearings and all new gaskets so far. I haven’t made it to the top end honestly I’m kinda stuck at this point I &%$#@!ed up and didn’t take pictures while taking it apart mistake on my end because I can’t even find any pictures or anything on it now. I already put the cases back together I’m now on the shift brake pause side I was wondering if anyone could help me with a few pictures of that side of the motor if someone had some? Or send me a link of a diagram of how it’s supposed to be and look. this is the only part I’m stuck on it’s pretty tricky but after that i just got the top end I really appreciate any advice or any pictures y’all come up with or diagram EVERYTHING helps I’m kinda dead in the water at this point ..

    • By 870
      I have a 2005 cr125 new to me. I had millennium tech replate cylinder and supply new piston. I replaced crank bearings and now it won't hit power ban. It feels like a 4 stroke bouncing off rev limiter. It is also putting a lot of black spooge out of exhaust i mean a lot. The plug is black. I cleaned carb and adjusted floats. I also repacked silencer. I noticed the carb leaking gas out overflow the other day. I suspect it is running really rich. I have a brand new pwk from Jd jetting I'm going to try out. I also did a leakdown test and it held. I also am not 100% sure the power valve is set up right. The manual doesn't go into great detail about this. But it seems like there is only one way to put it back together. I have the engine out I'm going to do another leakdown test and double check my power valve and put it back together with this pwk. Any other thoughts out there?