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Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles

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  #1  
Old 10-25-2008, 07:01 PM
somie1 somie1 is offline
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Wink Fuel tank

See if you have fuel allrady in you`r tank, could you put some more unleaded in it or will that just mess with the engine?
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  #2  
Old 10-25-2008, 07:19 PM
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Default Re: Fuel tank

Best fuel to use is low octane 87 or so. Just have to be sure the correct oil ratio is mixed with the new fuel.
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Old 10-25-2008, 07:43 PM
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Default Re: Fuel tank

I guess I am confused about the question. All gas in the US is unleaded. Are you asking about putting more gas in without adding oil? If so...not a good plan. If you are asking something else, please explain.
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Old 10-26-2008, 07:19 AM
somie1 somie1 is offline
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Default Re: Fuel tank

I live in scotland
well what i`m asking is, if you allready have petrol in the tank with the correct ratio of mixing with oil, but if say you need more fuel and you don`t have oil, could you put unleaded petrol in the tank and mix it with the existing oil and gas, or would that just mess up the engine?
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Old 10-26-2008, 07:30 AM
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Default Re: Fuel tank

Quote:
Originally Posted by somie1 View Post
I live in scotland
well what i`m asking is, if you allready have petrol in the tank with the correct ratio of mixing with oil, but if say you need more fuel and you don`t have oil, could you put unleaded petrol in the tank and mix it with the existing oil and gas, or would that just mess up the engine?
You risk making your blend too oil lean regardless of where you reside. Not a good idea, IMHO.
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Old 10-26-2008, 07:44 AM
somie1 somie1 is offline
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Smile Re: Fuel tank

ok,thanks for that, will not attemp it without oil.
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  #7  
Old 10-26-2008, 10:08 AM
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NunyaBidness NunyaBidness is offline
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Default Re: Fuel tank

Me and my buddy were at a friends house on our motorbikes one day and all his fuel leaked out because of a broken fuel line. We rode to the gas station and he filled up. Neither of us had any 2 stroke oil on us so he rode on home with straight fuel in his tank. That was ~6 miles to his house where he added some 2 stroke oil, he did put a little extra in that tank but he hasn't had any problems from it at all.
That's something that is NOT recommended to do, but can be done if needed. Just be careful and not ride WOT when you do it.
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Old 10-26-2008, 10:32 AM
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Default Re: Fuel tank

Hi
I found a pdf paper about two stroke oil/lubrication when researching about it a month ago
They used marked oil, and run series of tests with progressively richer oil ratios
Thing is marked oil lasts inside your engine for about 30 min of normal operation
And richer oil ratios protected against wear and allowed more hp
That could explain it
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Old 10-28-2008, 04:18 PM
somie1 somie1 is offline
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Default Re: Fuel tank

thanks for the info :d
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Old 10-28-2008, 04:26 PM
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Default Re: Fuel tank

Quote:
Originally Posted by NunyaBidness View Post
Me and my buddy were at a friends house on our motorbikes one day and all his fuel leaked out because of a broken fuel line. We rode to the gas station and he filled up. Neither of us had any 2 stroke oil on us so he rode on home with straight fuel in his tank. That was ~6 miles to his house where he added some 2 stroke oil, he did put a little extra in that tank but he hasn't had any problems from it at all.
That's something that is NOT recommended to do, but can be done if needed. Just be careful and not ride WOT when you do it.
I think that sound you hear is Pablo weeping....
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