2000 Suzuki King Quad vapor locking problems

[Andrew Serrano]

I have a 2000 Suzuki LTF -300 King Quad. My problem is it will start up great, very fast. It will run fine until it gets hot and I turn it off.  If I let it sit for a bit it will not start until I hold the throttle wide open and crank on the starter for quite some timr, acting has if flooded.....but I checked the spark plug one time this happened, went to change thinking it was flooded but only found a dry Plug????  It starts like if flooded but plug was dry, it takes awhile to start, then to get going I have to really rev it to get it clear and going...Thanks any suggestions would be great, thanks everybody in advance...!!!

[Frank Angerano]

Have you checked to see if you have spark when this happens ? I know the plug would be wet etc but take a look for sh*** and giggles when the bike won’t start if spark is there. 

Secondly I would do a compression test before and after the engine is hot as well as take the temperature of the cylinder head. You can do this with an infrared point and shoot thermometer to see how how hot the engine is getting.