Ok so after talking to one of the mechanics at the local stealership.....He said that I shouldnt run high octane fuel....instead to run low octane....due the the elevation all the fuell doesnt burn and fouls the plugs or something like that.......BUT...since I have been running the low octane i have fouled the plugs 4 times...the bike doesnt seem to be running as well....what do you guys think?

 

To me sounds a little weird, i thought the carbs have to be synched to the elevation or possibly jetted, the bikes are made for high octane and i cant see that really effecting anything even though there is less oxygen in the air. i think it would all have to be do to air fuel mixture. I would stick with high octane.

 

you will probably need to re-jet the carbs for your altitude. or maybe just start by reducing the fuel/air mixture, should be a spring loaded screw on the carb somewhere.

 

Yea they said I need to jet it for altitude...ill be doing that this summer. Ill go ahead and run it on high octane and see how it performs

 

High octane never hurts. Burns cleaner and reduces carbon build up. We only run 93 in the STs. Since the F2 and Hawk are track bikes we run 105. I don't go out my way to give the rest high grades but they get a tank every now and again.

 

Yeah...I think im gonna get the fuel additives advertised at the top of the page. Prolly not till I have the new motor in but once I have that in its gonna run nothing but highoctane with those drops, I think ill also try there oil additive and see how that works.

 

You have to remember that all higher octane fuels do is prevent detenation (or knocking) in higher compression motors. If your engine isn'thigher than about 8 to 1 compression you are wasting your money on higher octane gas. The higher in altitude you go, the richer your engine runs for the same carb settings. I ride up to 14,000 ft regularly (Colorado/Wyoming Rockies) and the carbed bikes from lower elevations backfire horribly at that altitude. I live at about 7000 ft so it doesn't bother mine so much. The higher you go in altitude the larger the oxygen molecules become. This equates to less air to burn your fuel with. This also means that the same bike that runs 10 to 1 at sea level does not realize the same compression ratio at altitude and therefore needs less octane to perform to its potential. Octane is not going to hurt and can only really help. Since CBR 600s get pretty good fuel economy, knock your self out.
When I moved from California to Wyoming, I had to have my CB750SC Nighthawk rejetted and tuned for the higher altitude and itstill never ran as fast here as it did at sea level.

 

Right on tazshido.You nailed it.

The only additive I've had luck with is Seafoam.You can get it at any auto parts store.It's like Marvel Mystery Oil,but better.

To reduce the possibility of carbon build up,use Chevron,Shell or Amoco/BP pump gas.Higher octane won't "clean it out".A well made gas will helpprevent build up.

 

Thanks a bunch guys...that explains it allot better to me