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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Alessio Corradini, on the Salar de Uyuni, Bolivia, of two locals

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Photo by Alessio Corradini,
on the Salar de Uyuni, Bolivia,
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  #1  
Old 18 Apr 2023
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Petrol 95 E10

So now its game over for the 95 E5 in Europe, its E10. Yamaha says its ok from 1990 all engines, cant understand why they have 1990, same carb components and engine before 90s. And the fact is that E10 is no good in any carb, there are just few pumps here and there with 98 E5. Any experience out there that have been filling E10 for a time? What about the acerbis tank in plastic? Here is a video https://youtu.be/PKrdOMTaaTQ

Goverments wants us all to get rid off old stuff, they think we are saving the world...
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  #2  
Old 18 Apr 2023
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Not Yamaha but I ran my old 1983 R80G/S on E10 for 20,000 miles in the US before it was available in Europe and apart from not running quite as smoothly I could not tell the difference and it seemed to have no adverse affect on the engine or carbs, as with when unleaded was introduced I expect the negative effects are blown somewhat out of proportion.
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Old 18 Apr 2023
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Originally Posted by mark manley View Post
Not Yamaha but I ran my old 1983 R80G/S on E10 for 20,000 miles in the US before it was available in Europe and apart from not running quite as smoothly I could not tell the difference and it seemed to have no adverse affect on the engine or carbs, as with when unleaded was introduced I expect the negative effects are blown somewhat out of proportion.
Thanks for info! Did you open carb in this time?
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Old 18 Apr 2023
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I quess stabilizer products will be hot seller from now, maybe som solutions that separate the ethanol. Or simply fill inn water in petrol and tap out bottom part water and ethanol combined. There will always be a way for the old and noisy!
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Old 18 Apr 2023
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Originally Posted by xtrock View Post
Thanks for info! Did you open carb in this time?
Yes it was over 2 years and three trips with the bike stored in between, I always drained the tank and carbs when storing, put fresh petrol in on my return and it ran straight away. I did take the carbs apart sometime after returning the bike to the UK and could see nothing had deteriorated in that time.
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Old 18 Apr 2023
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Originally Posted by mark manley View Post
Yes it was over 2 years and three trips with the bike stored in between, I always drained the tank and carbs when storing, put fresh petrol in on my return and it ran straight away. I did take the carbs apart sometime after returning the bike to the UK and could see nothing had deteriorated in that time.
From what i read around its very importan to drain carb often like you did, do the 98 octan in storage or if you want more power and milage where it is avaible. There is alot of videos that is like the one i posted, so lets see what happens in future. Btw the 98 E5 have never been added ethanol here, it was rated 0-5% ethanol and 0 it became.
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Old 19 Apr 2023
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Originally Posted by xtrock View Post
So now its game over for the 95 E5 in Europe, its E10.
As always, there's a lot of European fudge available when the market demands it.

Around here every pump has the mandatory E5/E10 stickers, right next to a big sticker that says "NO BIO COMPONENTS IN THIS FUEL". The workaround is that the 10% biofuel mandate applies *to the vendor as a whole*, and since the main petrol importer in the country also owns natural gas & wind/solar businesses, they offset those credits somehow to sell pure dinojuice to consumers.

Anyway, I always use 98 in my bike if it's available. The cost difference is pretty negligible, and I've found that in the bike, it does give me better mileage to compensate.
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Old 29 Apr 2023
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Ive been running E10 in my XT's and other old carbed bikes here in oz for many years. Never a problem and run great. As always with carbed bikes with any fuel, if going to store the bike for more than a month I make sure the carbs are drained.
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Old 29 Apr 2023
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Originally Posted by xtrock View Post
...can't understand why they have 1990, same carb components and engine before 90s. ...
My guess is that the post-1990 qualification has to do with various plastic and rubber components in the entire fuel system (not just the engine) being suitable for long-term immersion in fuel that contains 10% ethanol.

In other words, it's probably nothing to do with the performance of the engine or carburetors, it has to do with resistance to degradation of plastic and rubber components.

Michael
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Old 30 Apr 2023
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My guess is that the post-1990 qualification has to do with various plastic and rubber components in the entire fuel system (not just the engine) being suitable for long-term immersion in fuel that contains 10% ethanol.
Pretty much this, yes. Road engines run in a fairly low state of tune and have no problems using E10 even though in some ways it's an "inferior" fuel. The only big thing to be aware of is that it does degrade in storage so if you're laying a bike up for a year or more it's a good idea to drain the E10 and put in a stable product like Aspen.
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Old 30 Apr 2023
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Originally Posted by Tomkat View Post
The only big thing to be aware of is that it does degrade in storage so if you're laying a bike up for a year or more it's a good idea to drain the E10 and put in a stable product like Aspen.
In a carb bike, three months max in my experience and that's E5
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Old 2 May 2023
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I’ve been running my old 70’s two strokes on E10 for at least a year with no issues and have equally just completed a 1000 mile trip in the US on a 1969 two stroke Yamaha using nothing but E10. The stuff seems to work just as well as E0 using std ign / carb settings. Maybe I’m living in a fool’s paradise but it seems fine to me. I can leave my 125 Suzuki for months with E10 in the carb and it still starts 1st / 2nd kick.
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Old 30 Apr 2024
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Clarification regarding fuel use in the 2020 Yamaha Tenere 700

From what I gather from comments on this site, ethanol is combined ( in Europe anyway, ) with unleaded fuel producing E10 95 Ron as a combination, as an example. When I checked the owners manual for the 2020 Yamaha Tenere 700, it indicated this combination of ethanol/Ron rated fuel is required in the bike, that is E10 95. I thought the information meant that EITHER E10 OR 95 could be used. It seemed an odd way to express it when I first read it. I am going to ride in Europe soon and would appreciate knowing if the fuel is combined as stated above. Here in Australia we have our ethanol fuels pumped SEPARATELY from our 91, 95 and 98 versions and so I am a bit confused with the terminology in the owners manual. Any help available? Can you readily fuel up with non-ethanol, unleaded 91, 95 or 98 in Europe?
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Old 30 Apr 2024
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The problem doesn't come from burning E10 in your motor. It comes from leaving it sitting in your carb and tank.

As long as you're riding, it will be fine. It does have less "bang" for your buck but with an old XT600 you probably won't notice a thing.


However, over the long term, E10 will perish your 0-rings, fuel pipe etc quicker than E5.

But any modern fuel line and quality carb rebuild kits will be absolutely fine with E10. Just don't buy sh*t from Ebay/China. Pay the money and buy genuine Yamaha rebuild kits. I know they're expensive, but it's cheaper in the long run because they will fit properly and last a long time.


And NEVER EVER EVER leave your bike sitting over winter with a tank and carb full of E10. You shouldn't even do this with E5. But with E10+ it's expecially important.
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Old 30 Apr 2024
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Originally Posted by Fernbrook View Post
I am going to ride in Europe soon and would appreciate knowing if the fuel is combined as stated above. Here in Australia we have our ethanol fuels pumped SEPARATELY from our 91, 95 and 98 versions and so I am a bit confused with the terminology in the owners manual. Any help available? Can you readily fuel up with non-ethanol, unleaded 91, 95 or 98 in Europe?
The ethanol is mixed at the refinery, E10 is 10% ethanol. I'm touring round Europe now and E5 is quite hard to find except as top priced premium fuel. Non ethanol fuel is almost non existent.
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