What causes wide open throttle?
If your engine cannot reach the rated WOT, here are the most likely causes: restricted air supply, restricted fuel supply, increased drag, or an improperly sized propeller.
Do I need to give my bike throttle to start?
It could be an issue with the fuel injection system itself. Some sensor somewhere may not have a good handle on the temperature and not richening the mixture enough. Opening the throttle at start will, in most cases, deliver more fuel than air, making the mixture richer which works well for cold starts.
Why does my bike only run with choke on?
If a motorcycle or ATV only runs with the choke on, it’s because the richer “choke on” mixture is actually closer to the engine’s normal operating fuel mixture than the leaner “choke off” mixture. So when the choke is turned off, the engine gets too little fuel and too much air for it to run and it stalls.
Why does my bike bog from quick throttle openings?
We’ll look at poor jetting in a minute, but let’s look at the other reasons why your bike bogs from quick throttle openings. An accelerator pump is simply a device (usually mechanical) on a 4 stroke carb that shoots an extra amount of fuel at low RPM throttle openings.
What happens when you hit start on a bike?
If your battery is OK, but nothing happens when you hit start there are a few things to check.
Why is my 2 stroke bogging on first start?
The choke creates a richer air/fuel mixture to be able to idle on first start up. Leaving it on will essentially give you the same result as rich jetting, making it run poorly and sputter or bog.
How does the starter work on a Japanese bike?
The starter clutch uses steel balls or rollers that lock the crank shaft to the starter gears when turned in one direction and freewheel when turned in the opposite direction. This allows the starter to lock up solid when starting the engine, and then to release when the engine starts. Most of the Japanese bikes use this method.”
Is it hard to start a dirt bike?
The pilot jet has a very small orifice and clogs pretty easily. Once clogged the pilot jet is ineffective in delivering the necessary fuel to the engine and starting the bike becomes extremely difficult. Depending on make and model the bike may or may not be equipped with a decompression system that can be adjusted.
What’s the best way to start a bike?
1. Depress hot-start lever 2. Roll engine over with foot until compression stroke is found (on engines with decompression systems typically it will be possible to feel the decompression system working). 3. Kick repeatedly until bike starts (usually 1-3 kicks)
How to start a four stroke dirt bike?
what is hard to start for a four-stroke dirt bike engine? 1 Depress hot-start lever 2 Roll engine over with foot until compression stroke is found (on engines with decompression systems typically it will be possible to feel the decompression system working). 3 Kick repeatedly until bike starts (usually 1-3 kicks)
What happens when you open the throttle on a motorcycle?
Wide open throttle yields no power. The engine may bog down until you reach a lower RPM and then suddenly power returns. Spark plugs are clean – No residue. Insulator may be white. Runs better at higher altitudes – AFR becomes normalized due to reduced atmospheric pressure allowing fuel into the venturi easier.