Having temps running 340 at wot is just too damn cold.
On the land squids 100 mile run my Athena Hobbit averaged 442 @wot on long runs with cdi stock timing.
My power Peaks between 410 - 440.
Hell I even tried to kill it on that ride.
I put the hammer down and hit 487 Fahrenheit.
I was flicking the thumb choke to keep that piston temp down don't want to put a vent in the top of it.
And yes the power was fading at those high temperatures but I just wanted to blast.
Hit the choke chill it power back on heat fade hit the choke power on.......
When I got home I knew I had to retune this Hobbit.
Remove the Bison 2-stage reeds. Put in some single stage 0,35 carbon fibers.
The 21mm carb is just too much for that read block.
So I put a 19 mm pbhg on it so I get a better velocity mix.
Now running a main jet of 100, #40 slide, #40 pilot jet two and a half turns out, AU260 atomizer, W5 One Notch from leanest.
Slotted the stator plate and back the timing off and the thing rocks just under 430@ wot on Long flats and light upgrades.
The pipes too long so it tops out at 55/56 gps.
And I don't use cheap oil either if I did I would have been pushing it home.