Way too fat, is my guess. Look at the linkage between the throttle arm and the barrel valve. You want to lean out the motor, so loosen the jam nuts on both ends, and lengthen the link by three flats or so, to start. Keep track of the moves you make.
Start up the motor, and keep lengthening the adjustment till the rpms rise at least four to five hundred rpm over your normal idle rpm. This will be most likely lean enough to build heat in the motor. Once you have it to the temp you want to run at, fatten up the idle by shortening that link till the motor has instant throttle response.
To warm the motor once you have the barrel valve set, push the fuel shutoff patially closed, keeping an eye on exhaust temp, or enough to raise the idle as before. You will notice the motor won't like to be real lean until you get some heat in it, so be patient, leaning out a little at a time with the shutoff as it warms up. Also, you probably have fuel draining out of the injector lines when you shut off the motor. When you shut the motor down, starve it to death with the fuel shutoff, then hit the starter again after about thirty seconds, and it will run a bit and burn off the fuel that drained into the cylinders.
To restart, put the throttle to the floor, crank till it pops, quickly back off the throttle till it starts. May take five seconds or so. Keep the motor lean as much as you can to keep the fuel clear, and heat up the motor real good (210+) to clear the oil.