2016 yamaha yxz cams exhaust and intake spacer

mccarterjg@gmail.com · May 2024

TLDR 2016 yamaha now with WR GTYR cams looking for a cam tune to start with

currently have a header and full exhaust flashed ecu which i'll be sharing that file for those of you that are looking for a full exhaust tune,

just installed weller racing gtyr cams and air box spacer (arp head studs, 2019+ rods, and large oil reservoir) with recent engine rebuild,

knowing i'm going to turbo some day and change things multiple times I bought an ftecu kit.

a wideband sensor shows me running lean above 5k ish and over half throttle,

question is what air fuel ratio should i be aiming for 13;1? 14 is very lean and 10;1 feels very sluggish as far as throttle response when viewing the gauge, most of my riding is between 200 and 1000ft.

i see it runs very rich at idle which looks like a feature of quick cool down at idle from hot running which i'll see about keeping if i can at least get rid of it while in gear which should help my lugging on technical sections.