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Author Topic: Yamaha TY 250a gas and oil question  (Read 3468 times)
PilotSolex
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« on: January 25, 2014, 12:44:02 am »

My bike came with a tank of gas and oil in its Autolube. I have never owned a 2 cycle and was wondering what works best for the type of gas, and the oil for the Autolube, and whether also premixing oil in the tank is a good idea?
Is it advisable to use an octane booster in the gas?
Thank you.
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Mr. Neutron
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« Reply #1 on: January 25, 2014, 11:27:00 pm »

On questions like this (Which oil and/or gas is best?), you'll get a huge variety of opinions. Mine is probably no more valid than any others, but here goes.......

Personally, I like to run non-ethanol premium for gas, and a good synthetic (I use Amsoil) oil. I used to run a mix of 4 gallons of pump no-eth premium, one gallon of VP race fuel, and my oil at 80:1. I lowered the compression on my bike, and now simply (and much cheaper-ly....  Grin ) run the pump fuel. When I was buying the race fuel, it was $12.00 a gallon. I dunno what it goes for nowadays.....

Trials bikes typically have a healthy compression ratio, and I felt the mix with a small amount of race fuel was a good safeguard to keep it from pinging. I've never used an octane booster. so I can't speak to that, Pilotsolex.

Non-ethanol fuel seems to stay "fresher", and hold up better when being stored, than normal pump gasolines. I've never felt the need for a stabilizer with non-ethanol fuel. In my wife & daughter's little XR/CRF 100s, I have way fewer problems with the carbs plugging up pilot jets when they sit for months w/o being ridden by using non-eth gas. I also drain the float bowls to help that, as well.......

www.pure-gas.org has a list of stations that sell non-eth fuel, listed by the state. There are other websites with similar lists; just type in "non-ethanol fuel stations" at a search engine, & it should get ya some help.

Jimmie
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btc273
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« Reply #2 on: January 26, 2014, 11:20:29 pm »

I have 2 250's A 1974 ty and a 1977 ty both have the auto lube removed but if you are going to use it make sure the oil you use says  injector oil not premix. The Yamalube oil is 2-S for injectors the premix is 2-R. I don't see the need for running premix also as it will clog your pipe quicker and smoke more. Make sure the injector pump is working properly. I own 5 of these bikes 2 250s 2 175s 1 80 the 80 is the only one that still has the autolube still on it and it seems to work fine running stright non-eth gas  and yamalube 2-S in the injector tank.
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PilotSolex
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« Reply #3 on: January 30, 2014, 12:43:58 am »

Thank you kindly sirs!
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