YFZ450R Fuel Pump Specs

[rusty1245]

having trouble finding operational flow rates/pressures/amperage please help if you can.

[Canuck Racing]

-9.7m/s^2

Unless it's a 2012 and then I have no idea.

[Mbirt]

^Haha. The YFZ450R has been fuel-injected since its introduction in 2009. Yamaha's website claims that it has "Yamaha Fuel Injection", so I don't know if that means Keihin or Mikuni. If it's the former, fuel pump data is available here: http://www.keihin-us.com/_medi...uelpump_techdata.pdf (http://www.keihin-us.com/_media/pdf/fuelpump_techdata.pdf). The Keihin Type S is the pump in the aluminum housing on the LT-R450.

Pressure and amperage are easy enough to measure. As for flow, the pump seems capable of supporting 60 hp YFZ-R builds. The quad forums are your friend. Unlike the dirtbike community, those guys care about building power.

[Kirk Feldkamp]

Anyone care to share the pump curve for this pump? The max flow rate doesn't mean a whole lot. A 50 L/hr flowrate of gasoline with a .5 BSFC is ~160hp... obviously this isn't the pressure the pump runs at though.