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Welcome to the club of dissatisfied Massimo owners.. My 2017 only has 312 miles .. thats all I can get in between 6 trips to repair shops and waiting months for parts.. The Owner in Dallas admitted to me in email that the HISUN engines are junk, they dropped them and use Lintao motors now.. And btw..NO THEY WONT FIX THE HISUN JUNK under any conditions... .. I tried BBB , they are a joke.. Might as well leave a bad review on Tractor Supply.. [ They will delete it ] I did however manager to change several buyers minds at Home Depots and Tractor supplys .. After I told them of my experiences with HORRIBLE customer support, and how bad these units are, they all walked away from pursuing any purchase

Thanks for the reply..... I'm really tossed on the secondary fuel tank...I see a certain benefits but don't want to complicate things just because that's the way factory did it. For some reason the machine l seems to occasionally get starved for fuel. Not sure if it's the current fuel configuration or not. Having the gravity feed to the carb would ensure that fuel was there for quick starts and would provide a kind of surge tank if there were issues with the fuel pump consistently feeding. Current system has a T just before the carb that returns excess fuel to the gas tank. This line always seems to have air bubbles in it. I'm wondering with the T being right near the carb if the fuel line to the carb is getting air locked some times. ( I'm no mechanic so there is a strong possibility that I don't know what I'm talking about) 😁 I have some fittings on order and may adjust the flow lines to a configuration similar to the Weller racing fuel set up for the Rhino https://www.wellerracing.com/Yamaha-Rhino-660-450-High-Volume-Fuel-Kit_p_8.html Have read some good things about this set up... Also may install a primer bulb on the feed to the pump to prime the pump before starting...