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Not that I believe this.....find the dyno curves. I'd like to see them.
MR
I mean, using your logic, one could argue that it is pointless to put a new tire on a 450. You can't use all that power anyways so might as well "lol" at the people that put fresh knobbies on their bikes and keep running the same tire until it's a road racing slick.
Don't be that dumb...and if you truly are, please don't post.
My bike is an 02 but I have a couple friends with the 06 and Sir if you can ride that thing WFO 50% of the time you have my respect. I wish I could but I can't and I'm too old to try and learn now. I'm sure the bike would run better with better quality gas, I just don't see the need for me to use it. I bought my bike in 04 and just last year I needed to adjust my valves. I run premium pump gas only.
I don't race, I just ride to blow off a little steam and have a good time with friends.
No one likes to show up at the track and have their bike running like the jettings off week to week, its like throwing the dice with your race and more than half the time I've come up snake eyes with 91 octane Unleaded pump fuel out here. I also agree with cygnus the leaded fuels better for the valves and runs cleaner with crisper throttle response.
As far as using that over rated gummy 90 something octane VP 4.2 at 13 dollars a gallon that I dont think even makes anywhere near VP's claims is a huge waste of money and carb maintenance in my book.
Mitch Payton has worked with VP for 17 years. "Steve and VP's chief chemist, Duane Minazzi, come here pretty much on an annual basis to do fuel development work," said Payton. "MX isn't drag racing and power isn't everything. We value consistency and throttle response just as much. There are so many variables in MX, I can't be concerned with fuel. Fuel selection is as critical as my tires, shocks or engine components. I have people ask me to dyno other fuels all the time and we look at everything. VP has always shown me the most power and best performance-which is why every one of our 20 championships was won with a VP powered machine."
U4.2TM
The latest generation of our U4 based fuels, this fuel is a direct pour-in replacement for pump gas, with little to no jetting changes required - +2 main jets and +2 pilot jets at the most. Makes power equivalent to U4 with no sticky residue and a less pungent odor. Designed for stock and modified 2-stroke and 4-stroke applications. U4.2 passes AMA amateur fuel rules and is perfect for club level racing, CCS, WERA and AFM. U4.2 makes up to 6% more power than pump gas.
Pit Row
two identical bikes one with race gas and the other with pump. See how many of you boneheads can tell the difference (without smelling it)
I have a feeling the '6%' increase is to not make yourself feel bad for literally burning money, a placebo effect for your bike.
MRPro4.1 more likely. Or something specially blended.
MR-PRO4.1TM
Formulated to maximize power under AMA Pro Racing unleaded fuel rules while meeting the lower octane demands of 4-stroke racing engines. Used by 2007 Champions in AMA Motocross and Motocross Lights.
I have had to switch to race fuel at a race in 95F weather a couple times when the bike starts detonating. Only happens at tracks that are WFO
DUH, to lug my "slow ass" around the track!
Core? Ahem, NO. If I was core, wouldn't I still be on the "2-stroke" bandwagon?
Post a reply to: Does anybody use race gas in their 450...