Question about 1989 Suzuki GSX-R 750 K

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Fuel octane use

What octane are yall running? And what would be the pros and cons of running 109 octane on the street?

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I use 87 just like the designers of the bike call for. pros=you'll go faster due to a lighter wallet cons=your bike may blow up

Posted on Nov 10, 2008

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Thinking of going to 265/60/15 tires from 235/75/15 tires. What are the pros and cons of going to a wider tire?


wider tyres use more fuel, are prone to aqua-plaining in the wet and are a dam site more expensive to replace. there may be problems with hitting the mudguard edge on turns or hitting body work on turns. On the pro side there is better grip on dry road because of the bigger foot print, larger range of wheels available , better drive-ability at speed.
basically it will be what you want as the pros and cons are about equal. The biggest con is the loss of traction in the wet which is a real meanicing drawback in the rain/snow/ice

Nov 18, 2014 | Cars & Trucks

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Octane Myth


What is octane? Octane cannot be seen, but it is of utmost importance when it comes to gasoline. One thing for sure, higher octane fuel costs more. Allot more! Simply put, octane is a measure of gasoline's ability to resist detonation, which you hear as pinging and knocking in your engine. The higher the octane the more the fuel can be compressed without detonating before you want it to. Detonation, ping, knock, whatever you want to call it, occurs when the air/fuel mixture ignites before the spark plug fires. The mixture ignites from compression and not from the flame of the spark plug. In other words, the higher the octane the less likely it is to ignite prematurely. The only benefit to a high octane fuel is that it allows an engine to run at a higher temperature and with a higher compression ratio without pinging. Higher octane fuel does not provide more energy, more power, better mileage, more torque, burn cleaner, clean your engine, and is not better for the environment. If the engine is pinging when using the correct octane fuel, then it may be necessary to move to the next higher octane to prevent pinging, and damage to your engine, unless there is another problem. If you are using higher octane fuel for any of these reasons, STOP, you are throwing your money away. Also, never use a lower octane fuel than is recommended by the manufacture. If the manufacture recommends 89 octane then use 89. If they recommend 87 then use 87. The key is what was the engine designed to run at to achieve optimum performance and mileage? One exception is when you are towing a heavy load with a vehicle designed to run on 87 and you experience pinging. In that case it may become necessary to switch to 89 while towing. In conclusion, race car engines are designed to run on high octane fuels due to their high compression engines. You cannot make your engine a race engine just by upping the octane. Save your hard earned money, and use exactly the octane you need.

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Fuel octane rating for 2003 Honda CRF 150 F Motorcycle ?


93 super is the best of street pump fuel to run in it.

Nov 13, 2010 | 2003 Honda CRF 150 F

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What octane level of gas should I use for a 2003 Honda Shadow ACE


Usually premium (92 octane). That's what the bikes are designed to run on. Sometimes you can get away with using 89 octane. But try your best to never use 87 octane fuel, unless you're stuck somewhere and that's all you have available to you.

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1 Answer

If gas mileage drops dramatically (20 mpg to 12), what can be wrong?


I would suggest more than a minor tune-up depending on what has not been replaced over the years. I would suggest using an OEM plug. The platinum series or within that area on a 4-6 cylin. can make the engine skip or use just as much gas. I would also change the fuel filter and I personally don't use any injector cleaner. I use Lucas or a good octane booster which is a 109 octane bottle of gas. It cleans the fuel system well. Use 1 bottle for every 10 gallons of regular gas. The plugs are mainly the source to look at as one could be misfiring and you not know it. There could be other issues but you get deep into the issues of what causes the MPG to drop.

Aug 18, 2010 | 2002 Dodge Grand Caravan

1 Answer

Developing a ping... not bad gas, low miles


It may not be bad gas, but it could be the wrong octane rating for that engine. Check your owner's manual and see what octane is recommended for that engine. If you're running 87 octane and it requires 91 or higher octane, then you need to be running the higher octane fuel. By running lower octane fuel in an engine that requires higher octane, your getting pre-ignition, the knocking sound you hear. What's happening is that as the piston moves up on the compression stroke, the gas/air mixture is compressing and as the pressure goes up, so does the temperature of that mixture. It's possible that temperature can get so hot that the gas/air mixture ignites from the high temperature and not from the spark plug. Higher octane fuel will help this since higher octane fuel is harder to ignite. I say try running some 92 or higher octane fuel in your car and see if you still hear the knocking.

Jun 06, 2010 | 1986 Lincoln Town Car

1 Answer

It shuts down in to ect forced idle mode at 25 mph, then I shut down every thing and start it again, then it runs good for about 10 miles.


Most of the time when it goes to a kind of a electronic idle it is a fuel problem. Is the bike EFI or Carb? Are you putting in 91 octane fuel? Running below 91 octane can cause this problem after a long period of running the lesser. I found this out the hardway replacing everythiing from the coil to the computer. I hope this helps you

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Engine swap 04 zx10r on a 06 zx 636 f


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