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I am new to the TW200 but not to riding the small displacement bikes. I am 59 yrs old and rode a lot of Honda C110 Sport 50s and S90s. I had a 1967 Triumph Tiger Cub in high school. One thing that I used, added to my fuel was Castor Bean oil. Yeah, the same stuff that kids got in the '50s when you had a belly ache. It made you or broke you! I commuted to college on my 1965 C110 Honda Sport 50. To get more performance out of it, I added about 1 to 1.5oz of Castor oil to a gallon of fuel. When riding a small displacement bike, you feel ANY difference and it definitely made a difference. I have now been adding it to the TW and it has made a good improvement. It is considered an upper cylinder lubricant. I buy it at drug stores in four oz. bottles. It makes the exhaust smell good too!
 

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I am new to the TW200 but not to riding the small displacement bikes. I am 59 yrs old and rode a lot of Honda C110 Sport 50s and S90s. I had a 1967 Triumph Tiger Cub in high school. One thing that I used, added to my fuel was Castor Bean oil. Yeah, the same stuff that kids got in the '50s when you had a belly ache. It made you or broke you! I commuted to college on my 1965 C110 Honda Sport 50. To get more performance out of it, I added about 1 to 1.5oz of Castor oil to a gallon of fuel. When riding a small displacement bike, you feel ANY difference and it definitely made a difference. I have now been adding it to the TW and it has made a good improvement. It is considered an upper cylinder lubricant. I buy it at drug stores in four oz. bottles. It makes the exhaust smell good too!


Next time you're at the drugstore ask the pharmacist about special ordering quart bottles. They generally sell for only about twice the cost of a four ounce bottle. I use it on my saddles and occasionally add it to fuel. I order 4 quarts at a time.
 

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Caster Oil, interesting! Last fall, in part because of this forum, I started using Marvel Mystery Oil (MMO), in my fuel and oil. I have not paid much attention to any affects MMO has on performance, fuel mileage difference etc, other than nothing bad has happened. Easier starting this winter is the only thing I have attributed to the MMO in the fuel. In the past without MMO, I experience more cranking prior to the engine firing up. This year it started right up, everytime, just as if I had been riding it everyday. Nothing scientific I can prove, just my experiences.



With Caster Oil being mentioned, I think I will try it too, and do a little comparison (of the things I can check without NASA equipment) of the two products to see if I can tell any differences. I'm all for improvment, on the cheap.



Thanks for posting this information.



-Lizrdbrth, never thought about it on saddles. By the way, butt just a little sore today, went for my first 4 legged mule ride of the season. Normally, I start riding in March. Weather you know!
 

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It's an old packer's trick. Medicinal grade, no acids, purer than neatsfoot, cheaper, and no critter will go near it.



I once spent close to year horseback, saddles on the ground every night. Nary a tooth mark on either one.
 

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I have been googling a bit about castor oil added to gas for 4 cycle engines. The consensus among car guys seems to be that castor oil with additives is available and some like it, some don't. They say drug store pure castor oil will cause a lot of varnish build up as well as some other problems. Several at an RC aircraft sight when discussing the dame question recommended adding 2 cycle oil to the gas for their small high winding four cycle engines. One of those said that Stihl makes the very best oil.
 

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On a 4 stroke castor oil is arguably of more value in your crankcase than it is in your fuel tank.



Its possible that its qualities as a lubricant capable of clinging to hot metals may have been superceded by new synthetics, but castor oil as an additive was the basis of the "Castrol" brand oils for that reason.
 
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