

The expired fuel does more than throw a wrench in the ignition sequence it can also burn out your spark plugs altogether, which will cause starting problems even after you’ve changed out the fuel.Īs the rider mentioned in the quote above, the resulting combination of problems can also include a stuck clutch. If the fuel expires and begins to decompose, it can clog the accelerator pump circuit, causing the YZ 250F to have problems starting. I’ve never rebuilt it, and I’ve never adjusted the valves, although it always starts 1st kick cold or hot….”įour-stroke fuel only lasts about 20 days when stored in a plastic fuel tank. I change the oil every 8 hours and clean the filter every 5-10 hours, depending on how dusty it is. The bike is a 2009 and has about 160 hours on it since I’ve got it. I can try and push the bike, but the back wheel won’t turn when it’s in gear, even with the clutch pulled in.

I later discovered this is because the clutch won’t engage. So I decided to push it up the road and try and bump-start it, and it started! But I quickly realized something was wrong, and it died almost immediately after. I tried for at least 45 minutes just kicking it over, and nothing really happened. Let’s take a look at a real-life example from a YZ 250F-owner testimonial: This is due to the gas having a shorter-than-average shelf life due to the bike’s plastic gas tank. One of the chief complaints among YZ 250F owners is that the dirtbike has trouble starting, particularly after it’s been sitting for a while. What are Some Atlernatives to the Yamaha YZ 250F?.What’s the Resale Value of a Yamaha YZ 250F?.Yamaha YZ 250F Engine Stalls and Locks Up
