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Old 07-20-2014, 07:31 AM   #1
VolForLife OP
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Fuel recommendation ?

Forgive me if this is an old question. I couldn't find an answer using the search function.

What fuel type and octane is recommended for my 1971 Yamaha DT-1?

Back then, we didn't have unleaded. The gasoline near me is typically unleaded, 10% ethanol, and octane choices are 87, 89, and 91. I can find 93, but not as easily.

Thanks!



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Old 07-20-2014, 07:47 AM   #2
anotherguy
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The highest octane available and keep an eye on the plug for signs of detonation. It will be little black/dark brown spots on the insulator. If they show up the timing will need to be retarded a couple degrees. The advance curves were designed when fuel was good. Which the swill we overpay for is not.

I assume you don't want to run race fuel.

Pepper
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Old 07-20-2014, 07:54 AM   #3
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Quote:
Originally Posted by anotherguy View Post
The highest octane available and keep an eye on the plug for signs of detonation. It will be little black/dark brown spots on the insulator. If they show up the timing will need to be retarded a couple degrees. The advance curves were designed when fuel was good. Which the swill we overpay for is not.



I assume you don't want to run race fuel.



Pepper


Thanks Pepper. Makes sense.

Yeah I want to ride the bike locally on the street to trails and back, and I don't want to get caught out needing gas and not be able to find it. So race gas is probably not going to be on the menu for me.

I will look around to see if there's any stations nearby that have higher than 91 and/or no ethanol.



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Old 07-20-2014, 08:01 AM   #4
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91 should work well for you. Ethanol really becomes an issue when sitting/stored. If you're not going to ride for more than a week or so drain the carb. And use Startron. It works and is a good idea for regular use.
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Old 07-20-2014, 08:13 AM   #5
VolForLife OP
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Thanks again.

I have some samples of Driven Carb Defender I'm planning to try:
http://www.drivenracingoil.com/dro/c...case-of-6html/




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Old 07-20-2014, 04:50 PM   #6
B80
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I run a IZH 2 stroke as a work bike have dome many years now, when ethanol reared its head a few year ago in unleaded fuel here in the uk i looked into it a little further. Found that in the uk most unleaded was mixed about 5% at that time, but the super+ unleaded fuels from BP and tesco did not contain ethanol. So i started using this petrol from then on and have seen no negative results, its just the same as 4 star leaded as far as i can tell.
Not sure how much this will help you in America but if you get super pluss unleaded fuels look at them see how much ethanol is in their blends over there, your 10% is higher than i have ever seen mentioned over here.
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Old 07-20-2014, 08:46 PM   #7
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Pure-gas.org can help you find the good stuff.
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Old 07-21-2014, 06:52 AM   #8
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They don't update nearly enough. I haven't found one listed still selling it in a couple years.
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