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Your beliefs don't make you a better person, your behaviour does.
Check it out for sure, wiki will have an article. Basically a lot of what you see around the net is using American figures, which are lower than ours, even though they're equivalent to each other.
I think you would be unlikely to come across to many Japanese bikes that expired of that, they tend to fall of the road well before that causes any problems.
Why? - sounds like a untuned snap crackle pop machine that has not been set-up correctly! If it is nicely sealed you'll get a deep burble on the over-run with maybe a background tune of gentle humming 'pops' from the PAIR system. Sweet.
Your WOF inspector must be slack - they should specifically check for leaks In the exhaust system.
Compression ratio on the tedium is 10.4 to 1 and it runs Ok on the shite 91 stuff they have over here. 91 is the minimum it's designed to run on. It does run noticeably better on 95 but unless I'm in the mood for a fang I'm buggered if I'm paying the extra. I suspect that's just due to 95 being a better quality fuel than the octane rating. I've never found the rather expensive 98 of any brand being any better than the 95. I've ran mainly 91 in the bike, it's now 12 years old and approaching 80,000 Km. I suspect stories of "gunk" in the engine from 91 are just that....stories.
The GSX1200 has a lower compression ratio (9.5 to 1) so I guess you'd be just pissing your money away using 95 or 98.
Originally Posted by KickhaOriginally Posted by Akzle
Glad I bumped into this thred... I have been quite often running the WRr on 91, not realizing the stated minimum 91 recommended was (R+M)/2 which is not the rating pumps use . At 11.8:1 It runs noticeably better on 95, but I don't notice any difference running the e10 98 from Gull vs 91... Is my butt dyno not working or would the ethanol decrease performance?
Octane is something that is frequently misunderstood, because it is pretty complicated. Effectively, the higher the octane, the HARDER it is to burn the fuel. Lower octane fuel burns EASIER - but it is more prone to spontaneous ignition upon compression. Octane is NOT a rating of 'quality'; 91 is every bit as good quality as 95 or 98 ('they' don't flush out the pipes and use that gunk for 91).
So, a higher compression engine will prefer higher octane fuel - but 'higher octane' generally means 91, anyway. So you can use octane higher than that, and I know I do, but you probably don't *really* need to
More here: http://auto.howstuffworks.com/fuel-e...question90.htm
Well, you might transport your bike there to have a ride, then you need to know for sure. Different areas of the USA use RON, MON or (RON+MON)/2.
Otherwise, it simply depends on the bike. General rule of thumb is European bikes take premium, I certainly wouldn't put 91 in the BMW, although I believe it will automatically adjust to manage. The CB900... never put premium in it, 91 is just fine, and it's probably done 100,000km or more on 91 only.
Originally Posted by Jane Omorogbe from UK MSN on the KTM990SM
On 91 I get around 250-270 per tank before reserve, if that helps. 270km is very economical, very rare to get less than 250km. Motorways and suburban roads, complete mix and consumption doesn't really vary.
Originally Posted by Jane Omorogbe from UK MSN on the KTM990SM
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