Question about 2000 Yamaha DT 125 R

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Fuel for yamaha dt 125

As an accountant, we need to cut cost, we have more than 44 yamaha dt125 in the field. i am not a rider. i can't find any manual for this bike. i need help on the kind of fuel this bike can handle economically.

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Hi and welcome to FixYa,

A Yamaha DT125 is a 2stroke powered motorcycle, thus being so fuel efficiency is rather low compared to 4stroke ones. Additionally, it requires constant revving up to attain torque. Although designed basically for road use, its engine is at home with enduro/motocross style of usage.

To your concern of improving efficiency of fuel consumption. Other than regular maintenance, nothing much could really be done. It is possible to use smaller jets in the carbs but the performance would suffer and your riders would only gas it up more to get back the torque/speed they are accustomed to. Additionally, regular maintenance such as removal of carbon build-up in the cylinder head, cleaning the exhaust pipe, correct tire pressure, cleaning of the carbs, ensuring that 2T oil is delivered correctly to the engine are all that could be done.

Your best bet would be to prevail on your riders to be conscious of their riding habits and be aware of fuel conservation. Even tricycle drivers are now switching to 4 stroke to spend less on gasoline and forego additional expense on the 2T oil. It is also to my understanding that there is now a move to slowly phase out 2 stroke engines as part of the Clean Air Act/Laws of most countries even here in the Philippines.

Incidentally, you may want to re-evaluate your options and consider other possibilities such as selling them off and purchasing 4 stroke models. To confirm this, you could experiment and purchase 1 4stroke for use of one of your regular riders and statistically compare their gasoline consumptions. It may turn out that the savings in a given period justify the new expense.

Good luck and thank you for using FixYa.

Posted on Feb 14, 2009

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This bike uses unleaded gasoline. At only 6.7 to 1 compression you can use the lowest octane fuel you can find. 87 in the US is what that would be around here, but across the pond the octane numbers are different. But don't forget the two stroke oil. That may be more expensive than your fuel cost.

Posted on Feb 14, 2009

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