2006 model
2006-11-03 12:58:19 · 8 answers · asked by Bob Z 1 in Cars & Transportation ➔ Motorcycles
The KX bikes are designed with auto-decompress. I don't think that's what the lever is. It's your hot-start, or lean-start lever. Some people call it the tip-over lever. If you manage to flood the KX450F engine (like if you tip over), you can pull the lever when starting up again. Think of it like an "anti-choke." It will draw extra air into the carburetor making the fuel/air mixture leaner, and faster-burning, instead of richer. That makes starting a hot, flooded engine quick and easy, and lets you recover from ditching your bike quicker (you ever find yourself kicking up a stalled engine on the edge of the track while 10 guys pass ya?). Without it, you would have to try playing with the throttle while starting, which lets in more air, but also pours in more gas. When you're stalled...you really don't want anymore gas.
It does not lower the compression. Compression release levers simply let the pressure out of the piston cylinder so that it's easier to kick over--less pressure in the cylinder means less resistance as you kick. Air (and the fuel that's mixed into it) goes out...not in. That won't help you much if the chamber is flooded. Compression release levers do not change fuel/air mixture.
2006-11-03 14:01:32 · answer #1 · answered by Driveshaft 3 · 0⤊ 0⤋
*sigh* Some of you guys amaze me...
It is indeed the hot start button. It has absolutely nothing to do with the compression or lowering it. Nor is opening that circuit in the carb the same thing as opening the throttle. Good grief.
It allows cool air to BYPASS the fuel circuits and jets in the carb so that the cylinder can be cleared of the hot and unburnt fuel and leaning the fresh fuel charge out so that the finicky RFS engine will have exactly the right kind of fuel mixture it needs to fire after a fall while the engine is hot.
It does have an auto-decompressor and simply opening the throttle also pulls the needle out of the emulsion tube allowing the main jet to let fuel past and into the combustion chamber adding to the problem, not correcting it.
2006-11-03 23:38:11 · answer #2 · answered by Nomad 4 · 0⤊ 1⤋
Most likely it's called a "hot start." When the motor has been running for a while, if you stall or need to restart it, you pull that lever in and kick it and it should start up easier than without it, but really what it does is just open the carb to let a lot of air to get sucked into the big motor quickly so it lights up easier than if it was mostly closed. I think opening the throttle with your right hand and kicking it is just as good, but they need something fancy on there so they can sell them for $6000+
2006-11-03 16:55:07 · answer #3 · answered by Brent R 1 · 0⤊ 0⤋
I believe thats the hot start lever, my friend owns a racing four stroke and has the exact same lever.If you ever crash or try starting your bike when its hot it lowers the compression.
2006-11-03 14:18:33 · answer #4 · answered by George J 2 · 0⤊ 0⤋
2006 Kx450f
2016-09-29 02:26:28 · answer #5 · answered by besecker 4 · 0⤊ 0⤋
Nomad is absolutly correct, although a little cocky in his answer. Lets remember nomad, not everyone is a motorcycle mechanic
2006-11-06 00:57:53 · answer #6 · answered by robert s 1 · 0⤊ 0⤋
compression release?OK so they used to call it a compression release,now it's a "HOT START" lever.What's the difference?
2006-11-03 13:10:16 · answer #7 · answered by rustymustangs 3 · 1⤊ 0⤋
yes, what they said - hot start
2006-11-03 17:53:52 · answer #8 · answered by matty.. 4 · 0⤊ 1⤋