Unfortunately, some two-stroke engine owners had to find out the hard way that it doesn’t matter what year the engine was manufactured; ethanol is a death sentence for 2-stroke engines. I have a 2000 RM250. You can see this number on the pump you use at the gas station. The bikes in this class will have clutches, manual gear transmission and can provide the first steps into adult racing. The only drawback is the suspension, but from 2006 onwards, Yamaha treated the YZ250 to newer KYB SSS suspension. Password: Register: FAQ: Calendar: Mark Forums Read: Page 1 of 2: 1: 2 > LinkBack: ... 2-Stroke Dirt Bikes - Honda: 9: 03-18-2004 06:43 PM: All times are GMT -6. Considering The Slide. Petroleum based 2-stroke oil is made out of the same stuff you're mixing it with! Dirtbike Forums Portal - … Petroleum-based 2-stroke oil. A stroke is a motion of a piston, meaning a two-stroke dirt bike has 2 different motions of the piston, while a four-stroke has 4. Weighing a mere 212 lbs, it’s quite an impressive machine. The bike has a lectron carb and I mix the gas at 40-1. Would the ethanol free gas be better to run that the 91 octane e10 gas that I’ve been using? Most 2 strokes can run 87, trimmers, chainsaws, etc... What are you trying to run, boat, snowmobile, dirt bike? It weighs 217.8 lbs (98.8 kg). Octane is often misunderstood. Dirtbike Forums > Dirt Bike - ATV - Suspension Forums > 2-Stroke Dirt Bike Forums > 2-Stroke Dirt Bikes - Honda: What octane gas 98 honda cr250 User Name: Remember Me? The time now is 10:18 PM. This bike is heavier than the FX5 Mountain Moto, but it has more power and speed than a 125cc making it ideal for more experienced rider’s who want a lighter bike. Petroleum based 2-stroke oil is not widely used anymore, if at all, at least in dirt bike engines. This 2 stroke dirt bike boasts a water-cooled 250cc engine that has a claimed 48.8 hp and 32 lb-ft of torque, that’s held in place by a single backbone aluminum frame. Higher octane = less volatile fuel it resists detonation, perfect for high compression, turbo, supercharged. All over the world, dirt bike riders argue about whether 2 strokes versus 4 strokes are the better engine for dirt bikes. Why do you need hi octane 2 cycle gas? I will get into that in a different article. Portal: Forums: Photo Gallery: Contact Us - All Things Moto! are meaningless for jetting purposes.They can tell you a lot of things, but jetting isn’t one of them. 2-Stroke Dirt Bike Forums: 44: 10-28-2004 02:53 AM: Octane: Rowdy: 4-Stroke Dirt Bikes - Honda: 10: 08-01-2003 02:48 PM: All times are GMT -6. A light 250cc dirt bike is the Husqvarna FC 250. I was at the gas station the other day and noticed they had ethanol free gas but the octane rating was only 86. The American Society for Testing and Materials (ASTM) uses the measurement standard RON (Research Octane Number) when determining a fuel’s octane. Thanks! Best Adult 2 Stroke Dirt Bikes: 125cc – 200cc Two-Stroke Dirt Bikes 2021 Full Size To buy a bike in this class, you will either be making a transition from mini and junior class or will be a first-time teenage or adult rider. We don't sell the straight stuff because we recommend the castor, synthetic or blends. Is it high compression? Please note that, when reading plugs, the tip of the insulator, threads, etc. Only the mixture ring at the very base of the insulator, inside the threads, can tell you anything about the jetting.. Due to how two-stroke engines operate, there are a variety of problems that come from using ethanol -blended gas.