gas

[tomy]

Will it hurt my bike if I run 87 octane in my gsxr 750.

[No Neck]

Yes. You have to run premium or put octane boost in

[got2go]

Generally speaking, no, it will not hurt it.
I think your bike specs call for 90 or better (at sea level)

Where are you riding it ?
And at what pace ?
Is it just a temporary thing ?
Or are you asking if its ok to run 87 all the time?

At our elevation, you should be fine (unless doing track days).
The bike will only reach manufacturer rated compression pressure at sea level and wide open throttle.

Basically, you want to run the lowest octane possible where your motor does not ping/knock due to pre-detonation.

[ars0n]

750's are 91 octane.

You can run lower but it will hurt performance possible and if it starts to ping, put a higher octane in..

[got2go]

From the K8-K9 GSXR 750 manual:

Fuel and Oil Recommendation
Fuel (For USA and Canada)
Use only unleaded gasoline of at least 90 pump octane (R/2 + M/2).
Gasoline containing MTBE (Meltyl Tertiary Butyl Ether), less than 10% ethanol, or less than 5% methanol with appropriate cosolvents and corrosion inhibitor is permissible.


But, I'm not sure what year his is...

[ars0n]

90-91, same thing...=D hehe but i did put 86 in my bike once when it ran outa gas, she ran fine for a whole half a tank..

i think tomy has a 6 or 07

[got2go]

(10-28-2014 08:51 PM)ars0n Wrote:  90-91, same thing...=D hehe but i did put 86 in my bike once when it ran outa gas, she ran fine for a whole half a tank..

i think tomy has a 6 or 07

LOL

Yes, it will run fine.
Specially at our altitude.
Up here 89 is just fine, 91 is not needed.
And 87 is probably ok for regular riding.

[tomy]

OK thanks

[VEGASRIDER]

So glad my owner's manual recommends 87 regular for the FZ6. Saves me money too.

[Tumbleweed]

My owners manual recommends 89 or above, at sea level.
I run 91 anyway. Why not, given my frequent demands for performance.
As for OP, run what the manual says. Besides, unless you're putting as many miles on your bike as I do, does a few extra pennies at the pump really matter?