I mow w/a
BX23 w/a 60" MMM and with both the FEL & BH removed and I get a very nice finish cut. When I mow each row in opposite diections I even get the taletale "stripeing" so coveted by many mowers. Course it's too a lesser extend than a mower setup with rollers but it does provide a clearly visable stripeing effect. Even tho I got a pretty good cut w/the OEM std blades, I get better lift and disbursion w/the gatorblades I adapted two seasons ago and I mow the front lawn @ 3" and the back field @ 3.5".
From what I've read here and on other sites, if one wants very visable stripes it's best to cut @ 4".
I post this just to indicate that the BX can & will give a great cut when set up correctly.
A couple of easy checks to make sure you're setup correctly.
Air pressure HAS to be equal. The two backs have to be the same and the two fronts have to be the same. If not the tractor will lean and this will show in the cut.
The side to side measurement on the mower has to be the same. You have to measure at the blade tips and not at the MMM frame.
You adjust the side to side via the down links where they clamp into the MMM. On my 60" MMM you un-pin the link from the MMM and turn it up to raise or down to lower.
The front to back measurement should have the front blade tip approx 1/4" lower than the back. Basically the MMM cuts on the front swing and re-cuts the cut clippings on the back swing. The adjustment for this is via turning in the adjustment nut(s) to raise and/or out to lower, on the MMM's front link where it attached to the quick connect on the front of the tractor.
I find that I've had to readjust my MMM's side to side after each season from the wear and tear of finish mowing upto 4 acres once a week (sometimes every other week deoending on rainfall).
Engine RPM. Blade tip speed is the key to a good cut and the higher the blade tip speed the better. Inorder to get the best and optimum blade tip speed one needs to run the engine at it's rated PTO speed which for the BX is approx 3000 rpm. On my
BX23 this is a hair or two under WOT.
Some claim to get a great mow at less than PTO rated speed and if so good for them but, both the engine and MMM are designed to run at PTO rated rpm and I'm sure Kubota designed it this way on purpose ;D
Traveling speed has alot to do with the finish cut also.
Since our BX's don't produce the same blade tip speeds as the commercial mowers get we can't expect to mow at the same spped as they do and still get an excellent finish cut. For most if not all non-commercial mowers, the slower the better and the taller the grass the slower we should go conversely the shorter the grass the faster we can go
Lastly I've seen it documented that one will get the best cut and finish if one doesn't take more than 1/2" off on the cut. I normally cut @ 1/2" to 1" and get pretty good results.
Good luck