My friend has a 2015 YZ450F. The engine is totally stock. If he stalls it in the woods, it is very hard to start. It almost can't be started in gear. Once in a while it backfires when kicked. I have a fuel injected 2012 WR450F. It kick starts very well, even if stalled. I have set the C1 parameter with the FI tool so that it is richer at idle. Does the FI tool trick work on the FI YZ450Fs ? What can be done to make my friends YZ450F start easier ?