The engine should never die. The transmission may stall and no forward movement but engine should run on and on. I would suggest that if your fuel tank isn't full that you are running it out of fuel. Or a rag or something in the tank.
The gear part of the transmission is old school non syncromesh. More like an antique tractor. If there is and pressure on the gears they can be difficult to engage or disengage. The rtv must be stopped and the hydraulic pressure removed for the easiest gear changes. There is a dump valve...
I put 26x11x12 tires on my x1100c without any issues. The increased diameter sped things up just enough and the ride is better. On the stock steel rims
Correct. That pump has nothing to do with the transmission. Apparently it is dead heading and killing the engine? Since it idles and then suddenly dies i suspect that you are actuating the blade?
You are air locked. Dont run it that way. The new models have several air bleeds because of this. Probably should drain and add back very slowly until you get the same amount back in.
Also keep a close eye on the engine cooling system. Never let it overheat or the head cracks. Usually just keep the crap blown out of the radiator and frequently check the expansion tank. Run it hard they like to run at 3800 rpm all the time for many many thousands of hours .
On the rtv for long service life always use kubota sudtII AND none other brand. Use oem filters. Change the hst oil at least every second year unless you reach the service intervals in hours first. Don't wait for the hours. And if you must clean the engine transmission don't use water. Use...
Please remind me what the manual says about the relief valve and spring? Does the manual give a length spec for the spring? The redundant question.. has the oil been changed and replaced with sudt and are the filters oem and in the correct position.