Review on π§ HFP-PR8 Yamaha WR250F WR450F/YZ250/YZ250FE/YZ250FX Fuel Pressure Regulator Replacement (2012-2018) by Aaron Stewart
For 2012 WR250R
Yamaha's OEM regulator is not available unless you purchase the complete pump assembly ($350) so you save a lot of money. This Quantum regulator is only slightly shorter, but it fits and seals with ease. Yamaha's regulator is designed to hold fuel pressure between 34.8 and 36.3psi, while this regulator read 55psi when I did a fuel line pressure test. Yamaha claims that higher pressure will cause your fuel mixer to get rich, but I haven't noticed any performance issues, and no forum or review I've read online has yet found any negative issues from whom. Excellent customer service when I called to make inquiries.
- Meets or exceeds OEM specifications in form, form and function and is compatible with modern ethanol-fortified dispenser fuel. Designed for use with E85 and ethanol
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