You do not need a kit. The right gear with proper clutch control will do the job. Sometimes they do crack clean like that. You could just zip tie the fender back on. I have installed these so called kits. Not on my Beta. Taking a picture of the air box after you just washed the bike is pretty lame. You might look up Scottish Six Day bike prep for Beta.
I would not claim that trials is a race. Abunch of old guys watching one person ride his bike is more like watching a gymnast on a balance beam. Usually a poor one at tha
Which is another reason to ride no stop events. Leave the clock out of it.
For the carb swap you need a new intake boot (reed side), throttle cable and air filter boot spacer. If you can`t make it run with the Del Orto you have other problems.
I take it you are riding vintage b class, which is actually set as modern sections. I would try the 11/50 combo before going to the 10.
If you get a chance, you should try to ride a dew if the ITSA events.
Dennis finished 147th, his son 152 and his daughter 233rd at this years SSDT. She went on to win the 2nd day of the Trial 2 Women of the USA world round. Pretty good trials year for the family.
Dennis has ridden the SSDT for like ten years in a row or more. Has made a few friends along the way, which I am sure helped. He is a beast of a rider.