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Post by heruk on Jul 7, 2014 16:41:22 GMT -6
So i read somewhere that the octane used in a 150cc gy6 does not have to be 91 and above since the Chinese and US octane rating systems are different. is this true? and if so what octane is suitable?
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Post by Bashan on Jul 7, 2014 17:31:13 GMT -6
Unless your compression ratio is higher than 9.5 use regular. Here's the article.
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Post by heruk on Jul 13, 2014 13:05:29 GMT -6
thanks,
Any idea what my 2012 Roketa 150cc compression ratio may be?
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Senior Clinician
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Post by gatekeeper on Jul 13, 2014 13:31:16 GMT -6
Probably around 9 to 1. I use 87 octane in all of my scooters and my Chinese motorcycle with no problems.
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Post by Bashan on Jul 13, 2014 15:46:34 GMT -6
Highest I've seen a 150 GY6 is 9.25 to 1. If your valves are set right and you're getting spark knock then something weird might be going on. But if it's not spark knocking with regular it's fine. Spark knock is preignition and that is why they add spark retardants to premium. If it's not spark knocking it's fine. Premium gas is not "the good stuff". It is regular gas that has been treated to keep it from ignition from 10 to 1 compression, like a diesel does. Why doesn't a diesel have spark plugs? The compression sets it off. Regular gas has the cleaning additives just like premium. Jack told me that every once in a while the Chinese will grab parts off the shelf they're trying to use up and a motor gets built that has a bigger bore or a taller piston. On the outside they will look exactly the same. Inside they are a freak. An engine like that may indeed spark knock and need premium. But they are 1 in 10,000.
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Doc's Anything Goes
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Post by jct842 on Jul 13, 2014 19:56:12 GMT -6
And the book says premium....yes if you are in china use premium, they rate gas different than in the USA, their highest octane is equal to our lowest!
In 56 years of riding I have never ran premium in any motorcycle or scooter with exception on a suz bandit and the only benefit there was the extreme low speed power in the hot summer was smoother and nothing else was better, so most of the time I ran regular.
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Post by heruk on Jul 13, 2014 20:05:43 GMT -6
Thanks guys. Im a lot more confident now about gas.
Bashan, I hope that's not your body parts in that xray...
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Post by Bashan on Jul 13, 2014 20:27:43 GMT -6
Sure is.
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Post by cyborg on Jul 13, 2014 21:56:11 GMT -6
it's called a putz fracture,,,it only happens to careless mindless morons that drink too much vodka and don't put their hoses away in the shop,,,,,,don't worry you're safe Heruk,,,it's like a billion to one odds you get one  ,,,, |
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Post by Bashan on Jul 13, 2014 22:16:25 GMT -6
I need a football field worth of room to put my hose away. Everybody duck!
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Post by heruk on Jul 13, 2014 22:39:32 GMT -6
lololllolol
yea my hose is pretty big too.
big guy problems...
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Post by cyborg on Jul 13, 2014 22:41:41 GMT -6
I think a little snippy snip is in order ,,, think briss without the fun or religion,,,,,
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Post by Guitarman on Jul 13, 2014 22:45:20 GMT -6
If I knew at 18 that a man's parts kept growing his entire life, I'd already be rich beyond belief.
As for the rest of you... I think more meds are indicated.
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Post by Bashan on Jul 13, 2014 22:50:54 GMT -6
What time is it? OK, it's late enough. My crank is so big that...it spans two zip codes. Next
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Post by Bashan on Jul 13, 2014 23:10:45 GMT -6
I can't wait forever..my crank is so big it has it's own Wheaties box. I'm just talking scooter parts here right?
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,,,,
