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+--- Thread: What does G91 stand for under the gastank cap (see pic)? (/showthread.php?tid=412)
What does G91 stand for under the gastank cap (see pic)? - bioman_imp - 07-05-2022
Is it a recommendation for the ideal octane level percentage?
![[Image: 665a73cf7cba36f4035949f50ae4ad5e.jpg]](https://cb1100forum.net/forum/uploads/imp/202207/665a73cf7cba36f4035949f50ae4ad5e.jpg)
RE: What does G91 stand for under the gastank cap (see pic)? - Lord Popgun - 07-05-2022
Mine says the same thing so it is not for octane. 87 specified for US CBs.
RE: What does G91 stand for under the gastank cap (see pic)? - peterbaron - 07-05-2022
So it is for our Canadian bikes as well
RE: What does G91 stand for under the gastank cap (see pic)? - Cormanus - 07-05-2022
Mine says the same thing and, even though Honda recommends 91 octane fuel in Australia, I suspect it's more likely to be a part number.
RE: What does G91 stand for under the gastank cap (see pic)? - jtopiso_imp - 07-05-2022
(07-05-2022, 10:19 AM)Lord Popgun_imp Wrote: Mine says the same thing so it is not for octane. 87 specified for US CBs.
Can be "91 octane RON", which is the standard in Europe (and I assume most parts except the US)
91 RON can be 87 octane (US)
RE: What does G91 stand for under the gastank cap (see pic)? - GoldOxide_imp - 07-05-2022
Honda would likely put a sticky label on the fuel tank if the CB1100 required a performance grade of gasoline and not void warranty.
"G91" is a subassembly number.
RE: What does G91 stand for under the gastank cap (see pic)? - Tev62 - 07-05-2022
Apart from that your fuel looks dead murky
RE: What does G91 stand for under the gastank cap (see pic)? - Gone in 60 - 07-06-2022
One of the first things I noticed when I was looking at my CB was that the gas cap was the same as my old Nighthawk 750.
Can someone here with a Nighthawk see if their gas cap has the same stamping?
RE: What does G91 stand for under the gastank cap (see pic)? - bioman_imp - 07-06-2022
(07-05-2022, 10:15 PM)Tev62_imp Wrote: Apart from that your fuel looks dead murky
Haha, yes, it looks very oddly coloured indeed in this picture. But I can assure you that in real life, all is well.
