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Premix theory...yall probably tired of hearing this...
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[QUOTE="Rich Rohrich, post: 742080, member: 16241"] Absolutely, jetting is the key to performance. The too much oil fouls plugs line of thinking is really flawed. You can run a two-stroke at 14:1 ratio and not foul plugs IF it's jetted properly, you run decent fuel and it is ridden hard enough. Most plug fouling problems can be traced directly too poor jetting rather than oil ratio. I've run my last two two-strokes at 16:1 and 18:1 without spooge and never fouling a plug. Proper jetting and good fuel were the keys. How much oil you need to run is pretty much a function of 3 things: - Load - Higher loads demand greater amounts of oil. The amount of time spent under load is significant as well. More time under load requires more oil. - RPM - Higher rpm will in many cases require more oil. RPM and load tend to be closely linked, so the same basic rules apply. - Heat - To a lesser degree heat plays a role in determining oil volume requirements. Watercooled engines have made heat much less significant in terms of oil requirements but it's still something to consider. Engines that are subjected to high heat tend to live longer with more oil. What this all means is you should base you premix ratio decisions on the intended use of the bike. YTrials riders run happily at 80:1 without issues, while super kart racers routinely run 14:1 with a perfectly dry exhaust. The manufacturer's recommendation is usually a pretty good starting point for most of us. :thumb: FWIW, running more oil in the mix does NOT make it harder to get the fuel through the jets. I have no idea where that notion came from but it's just wrong. The overall viscosity change that comes from adding a few ounces of additional oil to a gallon of gasoline is miniscule. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Premix theory...yall probably tired of hearing this...
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