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switching premix

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I have used Klotz super techroline forever and i decided to try Klotz R90 ,,Fouled two plugs within one day,,, I never fouled a plug before. Do you think I may have some of the superT still in the tank and its just not mixing together? I did not empty the tank I just added the R90 because it needed gas. :thumbsup:

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I have used Klotz super techroline forever and i decided to try Klotz R90 ,,Fouled two plugs within one day,,, I never fouled a plug before. Do you think I may have some of the superT still in the tank and its just not mixing together? I did not empty the tank I just added the R90 because it needed gas. :thumbsup:

I would of drained the gas tank before I switched pre-mix . Drain it and start over.

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I have switched premix several times without draining the tank and have never had any problems. I have always heard not to do it, but i have never seen or actually heard of anyone having any problems doing it. You kept your mixing ratio the same and everything. I guess you can try what gixxer said. But i dont see how just changing oils would make a difference. Hopefully someone has knowledge on this

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The tech info for R50 says " Premix at 40:1 to 50:1 only." Bel Ray and Amsoil also make oils which are designed to be run at high dillution ratios.

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Just thought I would get away from the bubble gum smell of the superT.. More suggestions would be helpfull.

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In most cases, different oils will have different viscosity characteristics. You may be able to run the oil at 32:1 but may have to adjust your carb or even rejet to get the same performance. Even though BelRay is capable of running 40:1 or 50:1, I've always run it at 32:1 and jetted for that ratio. Been doing this for the last 19 years with no problems and I get more much more life out of a top end than the manual recommends.

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I used to run Castor 927. It was great oil. Although i switched to yamalube because it is a lot cheaper

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927,MMMM, that smell!!!!

Yeah my buddies still run it. I sometimes find myself stayin BEHIND those 125's when im on my 500 lol. But then, in the end, i cant resist the blow-by at 100 mph :thumbsup:

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My bike was jetted using HP2 @ 32:1 and when I tried Klotz R-50 my bike ran rich too. I've also tried the Super Techniplate 20% castor and it ran a bit rich as well. I talked to Klotz and they told me that R-50 was a 50 wt oil and needed to be run at 50:1 and that Motorcycle Techniplate KL-302 full synthetic would work better for riding tight singletrack where you're not revving the motor. You might try doing a search for "Klotz" on KTMtalk where there's at least a dozen threads on this subject. Good Luck. :thumbsup:

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Yamalube is one of the best and recomended by many.

I've run it KX's Yz'x and my current CR 32:1

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