YZ250X Power Jet Zero - Yamaha 2 Stroke - ThumperTalk
网页2021年2月11日 · If you take 2 YZ250's BOTH running/tuned optimum but BOTH using different jetting. The YZ that is using more fuel and air will be producing more power. Internal Combustion Engines (ICE) requires the MAX , usable, Fuel/Air mix to produce the max power. It is the basis of their design.
My favorite YZ250x mods! - Yamaha 2 Stroke - ThumperTalk
网页2019年8月14日 · ThumperTalk. So I have a 2019 yz250x and I have recently changed two parts that have made it so much better in the tight technical singletrack. First the heavier GYTR flywheel made a huge difference. But then I put on the new Lectron H-series carb. This combo has made the low end so much better.
Which flywheel weight for YZ250X (and install) - ThumperTalk
网页2018年1月18日 · I have a 2018 YZ250X and based on suggestions from a thread I posted on "what YZ250X mods out of the gate?" I'm looking into adding a flywheel weight. This Steahly model comes in 11 or 13 oz. ... and this MSR model comes in 9, 11 or 13 oz. Any suggestions, especially on how much weight, would be much appreciated.
2023 YZ250X Jetting with Keihin Needles - ThumperTalk
网页2024年2月14日 · After quickly jetting the new bike in early spring of 2023 to get a base line of the required jetting for this motor, the jetting appeared to be consistent with other people’s results. Quickly settled on HYHW-3, 48 pilot-1.5 turns …
2021 yz250x jetting questions - Yamaha 2 Stroke - ThumperTalk
网页2020年10月15日 · 48 pilot jet. stock needle 2nd position. air screw 1.5 turns out. 30:1 fuel ratio. The bike is brand new with less than 10 hours on it. General riding conditions. Elevation - 50M-250M. Temp : 15-25C ( or 59-77F for my American riders) Humidity anywhere from 50-100% depending on time of the spring/summer/fall.
2022 yz250x - Yamaha 2 Stroke - ThumperTalk
网页Posted March 6, 2022. Despite both being 250 2-strokes, the Sherco 250SE versus Yamaha YZ250X can't be compared as direct competitors to each other. -the YZ250X is still 95% an MX race bike with very few off-road features 'sprinkled on'. (18" wheel, kickstand, minor engine and suspension characteristics changed)
YZ250 or YZ250X? - Yamaha 2 Stroke - ThumperTalk
网页2015年10月4日 · If you want to beat guys on 4 strokes, or ride anything technical or just ride faster for longer, then: 1. The stock YZ250 1999-2015 motor doesn't have broad enough power. On/off pipe is stone age. 2. The stock suspension is too firm or harsh. The 250X will have broader power, mainly via the head and porting setup.
YZ250X premix oil and ratio - Yamaha 2 Stroke - ThumperTalk
网页2019年3月4日 · ThumperTalk. I know I’ll get a different opinion from everyone on this topic but I like seeing what everyone else has to say. I recently decided to do some research as to what ratio and premix oil to use in my 2018 yz250x. The past several years I have used Amsoil Dominator at 50:1.
Apex Racing Yamaha Cylinder Heads - Yamaha 2 Stroke
网页2021年3月6日 · I don't know how to explain the power, the bike just runs better everywhere. Here's my setup for eastern PA (500-3000'): 175 main/45 slow/N3CW-2/40 power (needle is leaner than Kinger's) 2020 YZ250X. Only mod on the engine is the power valve governor and the Apex XC dome. Edited March 7, 2021 by DirtyBeers.
Yz250x sag - Motorcycle Suspension - ThumperTalk
网页2018年12月2日 · What is best sag settings. Static sag 25 to 35mm. I think the YZ rear geometry (linkage and swingarm) gets better rear tire hookup with static in 25 to 30 range. Needs a minimum preload so lighter riders beware of overly stiff springs. Rider sag 101 to …