My 1999 600 grizz has a little problem to stay running
problem usually starts within an hour of trail riding.The bike will stall out at an idle and just will not start
You usually have to wait about ten mins to get running.Also what will happen is the elec start will not work.You may get it running three or four times before you can continue on.If you can keep the throttle on it will work fine.I also find that she will shut down sometimes after going throw water.
I've replaced: jets, airfilter, throttle cable, ,check wiring, replace sparkplug

I haven't replaced coil, or checked out CDI
My Yamaha dealer has had the machine twice saying they fixed it but they haven't

also is there any aftermarket product to help cool the machine down without having to replace the old oil cooler. Thank you
The choke assemble was ceased so I've had it clean up. could this still be the problem?