Originally Posted by bigmatt

I have been breaking in my gxr-3port.I have almost 1/2 gallon through it and I swear it dropped it's nuts. isn't this a little soon? I did the idle-1/4 throttle 3 tanks,1/4-1/2 blips next 3 tanks. was out running it again this afternoon and after 2 more tanks of up to 1/2 throttle blips it just started hauling ass. I cannot turn engine over by hand, trying to turn flywheel with finger. so should I leave the break in shim in? or take out? I also needed to lean the lsn,and hsn. so it would run. it was getting way to much fuel. my tank times went from 22-24 min down to 12-14 min. I,m use to the gen5/5.5 engines where at 1 gallon you were praying you didn't fry the starter box. One last bit,I kept foil around the head/heated with heat gun temps 240/260, dropped to 220/230ish range.then dropped down to 200/210. So I need some one with alot of knowledge on the gxr series to let me know. grizz/gizmatron/racer22/ruune.