New guy here. Friends 2001 500 will start and run just fine, for a few minutes. After a short time it just bogs down, when throttle is depressed, it will idle, but will not pull the bike at all. The instrument panel does not display ANY information at all. The ignition switch was replaced with aftermarket component, due to someone losing the key, put factory switch back on, with same results, no display. Carb has been cleaned, tank removed and thoroughly washed out, petcock filter checked, all clean. Have basically run out of ideas, can someone possibly point me in the right direction? Thanks ahead of time for any and all help.