My friend EV bought one off Amazon and the fuel pressure regulator was set wrong. He contacted Quantum and they sent him a new one and recalibrated future units. He is happy with his, although he just sold the bike, due to mileage. He rides to work daily, plus weekends, so he put 20k on that pump, easy.
2012 XC Tour, Sunset Red/Silver PC-5 Thrush mod pipes Lloydz air filter and timing wheel.
California Sidecar Trike Conversion