![]() I always use Simple Green Industrial cleaner & degreaser (Amazon) because it’s strong enough to clean old gas and it won’t hurt your carburetor. To buy your ultrasonic cleaner on Amazon click here or the image below. If the carb is really dirty, then your dirt bike will start easier, idle better, and run stronger with better throttle response after a deep cleaning with the right solution. It will pay for itself after cleaning just one or two carbs. I remove all the main parts when cleaning a dirt bike carbĪn ultrasonic cleaner penetrates all the old gas and dirt that gets stuck in the tiny passages that are sometimes impossible to clean with just carb cleaner spray (which I rarely ever use anyway). You can also try and push start your dirt bike. If it starts or runs for a second or two then you know it’s not getting gas from the dirty carb. With starting fluid or a little bit of gas (half a spoonful is enough) down the spark plug hole try starting it again. There’s a couple more quick ways to confirm that the carb may be dirty. If that doesn’t work, you may need to take the carburetor completely off and dis-assemble it for a more thorough cleaning. Confirming Your Carb Needs A Thorough Cleaning… This can be done in a matter of minutes by removing the float bowl on the bottom of the carburetor. You can sometimes just loosen up the carb clamps and rotate it to spray out the jets while still on the bike. Cleaning The CarbĬarb cleaner and compressed air are your friends if the carburetor isn’t too filthy. It will run the most consistently and last longer than regular pump gas before breaking down and going bad. Non-oxygenated gas works very well in dirt bikes and other performance machines. Once the gas breaks down it will cling to your carb and clog the jets and passages.Ī good quality gas will have no ethanol in it, so look for that on the pump when filling your gas can. Regular pump gas is full of so many additives these days that break down in short time. Use fresh gas and pre-mix if you want it to run well Using high quality gas will make your dirt bike run better and cause less problems in the long run. ![]() Dirt bikes with smaller carbs, jets and passages can gum up in a matter of weeks because of old gas sitting in it.Įven if you can see through the pilot jet, there may be just enough crud stuck on it to not allow enough gas through to ignite the engine. Next up is the carburetor, which is the root cause of many ‘no-start’ situations. If that doesn’t work then the pilot jet may need to be swapped for a larger size. Try adjusting the air screw or fuel screw on the carb to allow more gas through the carb. On the other hand, if the jetting is too lean then the engine isn’t getting enough gas to start it. To learn more about how jetting works and to get your dirt bike running better go here. The pilot jet is the most important jetting circuit when it comes to starting your bike. A rich jetting mixture is one of the main causes for a flooded engine. Won’t Start When HotĪ dirt bike that won’t start when hot is often a sign of the engine getting flooded. Lithium batteries require a Lithium specific battery tender. They’re cheaper than a new battery and you can use it on any dirt bike or recreational vehicle in your garage.Ī battery tender is better than a charger because it won’t overcharge the battery, which may ruin it or shorten its life. If you don’t ride very often and your dirt bike doesn’t have a back-up kick starter, you should consider getting a battery tender (Amazon). This means it needs to be charged or replaced. It will either spin the engine over slowly or you will hearing a “clicking” noise from the battery. If the battery has a low voltage or charge then it may not have enough power to start the bike. Battery Just Clicks?Įlectric start dirt bikes have a battery that powers the starter. Low compression is the result of a worn top end. Keep reading to learn how to properly fix a dirty carb. The most common causes are a dirty carb or low compression. You’ve confirmed that the gas is getting to the carb, and the spark plug is properly igniting, but your 2 stroke dirt bike won’t start. 2 stroke has fuel and spark but won’t start If it backfires, then there’s still most likely too much fuel. You can try starting it again after sitting for at least a few minutes. ![]() If the engine is flooded, it’s best to wait for the fuel to evaporate. Repeated kicks without starting can cause floodingĬontinuous start attempts will also flood the engine with even more fuel, making your situation worse. ![]()
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