WebNov 8, 2024 · IMO stock YZ125X carb settings are still very 'motocross/racing oriented'. (meant to run best when pushed hard) For slower / technical trail/off-roading, it could benefit a lot from pilot jet and needle tuning to run 'crisp' at moderate throttle inputs. Measure and if needed correct the compression squish height of the cylinder head, http://forums.sohc4.net/index.php?topic=11717.0
Jetting Mikuni TMS/TMX carburetors - dragonfly75.com
WebJul 16, 2006 · This causes more air to be sucked into the mixture, and the carbs compensate by moving up to the next step in jetting, the slow jet (which provides slightly more resistance than the pilot jet). Now keep in mind, the pilot jet still continues to allow fuel to pass, but the slow jet is making a "correction" to the fuel/air mixture. WebAug 22, 2024 · Artwork: Carburetors in a nutshell: they add fuel (red) to air (blue) to make a mixture that's just right for burning in the cylinders. Modern car cylinders are fed more efficiently by fuel-injection systems, which use … gherkin cucumbers
How to Modify Your Carburetor to Run Oxygenated Race Gas - MotorTrend
WebMar 5, 2024 · Pilot Jet and PMS explained Some of you have recently sent me notes asking for clarification between Bulldog's Jetting Primer and Mucker's Principles of Carburetion, with respect to what sounds like different explanations of how the Pilot circuit works in the Road Star's stock Mikuni carburetor. WebOct 29, 2012 · Every carburetor know to man will have a way to adjust the air fuel ratio at idle. This adjustment will trim the mixture so that you can have a smooth running engine. The first step is to determine if you have … WebMar 20, 2024 · A carb has three main circuits: the pilot jet, the needle, and the main jet . As a rough rule, the pilot jet is for tuning 0-¼ turn throttle openings, the needle is for ¼-¾ turn throttle openings, and the main jet is for ¾-full throttle openings. Lean pilot jet symptoms aren’t the same as lean main jet symptoms, so you can treat them the same. chriswillx reading list