[dudenhymer]

Ok, I'm reading some posts about you guys using higher octane gas than 87, like Cam2, isn't that stuff like 110 octane or something like that?? When I bought my bike, the dealer told me that running anything higher than 87 octane would retard the timing.... So I run nothing but 87 in mine... Have you guys noticed any benefits to running a higher octane gas???

Thanks
Sean

 

[brinker007]

Retard the timing ?!!? Possibly if you run 110 octane, but 93 is fine. And personally I believe it gives slightly better performance and gas mileage.

 

[rngmstr]

the only benefit you will notice with the high octane race fuel on a stock motor is a lighter wallet.

 

[jjwenzel]

There is no sensor to advance or retard the timing. The only thing I've seen that can offer more power in a fuel is something like VP's Ultimate 4 or CMP. Both have oxygen boosters in them allowing a quicker and stronger fuel burn. Octane is an indicator of resistance to self-ignition as temp increases. Compression causes the temp of the combustion mixture to increase. The connection between Octane and compression can be seen. Gas components that increase octane can slow the flame speed effectively retarding timing and causing poor throttle response. This would definately be felt if you switched from pump gas to a low quality high octane formula.

 

[bigcraig77]

im pretty sure the manuel says to run 92-93 octane

 

[rngmstr]

mine says 87

 

[cmc72_2000]

jj sounds about right, i've tried a 50/50 mix of pump gas and Vp ultimate 4 - call me crazy but i think it can be felt! you do need to make sure to richen the mix alittle due to the addtion oxygen i suppose. i was told by VP to richen it across the whole range, but 50/50 with my setup seems to be great. i may raise the needle a little more and maybe go up a hair on the main just to be safe. this stuff is big $$$$$$ - the local shop wants $40 bucs for a 5 gallon jug. thats another reason i cut it!

PS you will love the smell!!!!!!!!

 

[cmc72_2000]

ULTIMATE 4
Designed for ultimate performance in 4-stroke motorcycles. Generates up to 6% more horsepower than pump gas. Makes 4-stroke engine faster and more responsive without harming the carburetor, O-rings or gaskets as some competitors' race fuels will. Can also be used in stock 2-strokes with the same impressive results.

• Color: Clear
• Lead: 4.2 grams/gallon
• Motor Octane: 92.2
• Specific Gravity: .718 at 60° F




this is their desription

 

[robg]

Given that the motor has 10.8:1 compression, I wouldn't run anything less than 91 in it... but that's just me.

Rob

 

[cmc72_2000]

Sunoco StandardTM



The best selling racing gasoline in the world!
Sunoco's all-purpose leaded racing fuel with a winning heritage, Sunoco Standard provides quality, performance, and consistency for ease of tuning. It is ideal for virtually all forms of motorsports, including circle track, drag, motorcycle, road racing, offshore powerboat and off-road. It also features a broad range additive package for complete protection from oxidation, corrosion and deposit formation. Sunoco Standard will help protect competition engines with compression ratios up to 13:1 from damage caused by detonation.