i cant speak for moto gp, but you can never have enough tools in the pits. i have a few friends who had factory mx rides-- they always had spare everything and a paid crew ready to tweak whatever.
it is always interesting seeing what goes on in the pits. much of my racing inolves crew chiefing-- which is fine by me because i basically travel to races for free and do what i like to do on someone elses dime. nothing beats a good day of racing w/ no break downs and finished off w/ a good drink and meal at a bar at night with the other racers. i actually take more pride in building a car than driving one to a win.
when i was going around for import drag racing in a heads up class, the top pro teams were stacked, yet alot of pro class teams were still grass root level money wise. Just a look at the rig told you who was funded and who wasnt. For most part, import side was/is grass roots. nothing like fuel cars or pro stockers when it comes to amount of money being tossed around. as most of the sportsmans didnt have spares let alone good tools. even the top pro cars were not really well stocked in name brand type of tools. they had what they could afford and worked. i was fortunate to be w/ a upper level sportsman team that went into pro ranks before nhra/nopi both went out.
granted, we started out w/ a borrowed open trailer and sleeping in the truck or trailer at events. i would borrow a portable gas powered compressor, and bring tools home from work because i didnt own a second tool set yet. i dunno how many times we would drive to an event friday after work- get there saturday when the gates open, qualify low or not at all due to finding the limits of **** breaking and drive home sunday and go to work monday morning. By the time it all ended, as a sportsman we had a loaded 40 inch tool box on board w/ generator/engine hoist etc and were a contender in turbo 4/srwd classes. came a long way fast. but it was to good to be true and nhra/nopi went under. thankfully i didnt move w/ the rest of the guys who went south to build the pro class car in a joint venture with a promininet nissan shop. they dropped a lot of coin and had a well built and well covered amongst the import scene drag car, the 2 car stacker, on board welders etc etc. but no where to race.
when i travel for formula drift events, im very impressed with the car builds and tool layouts in the pits. it is drag race horsepower with road race chassis prep. it is the most fun/challenging for me as a crew chief to set up for. as every course is different. for this, i take my home tool set-- which is a 40 in cornwell box w/ a vice mounted on top and stocked w/ a miss-match of quality tools. i have every hand tool i need to do whatever plus cordless impacts. only thing i cant do is change the engine, as we have no lift or spare. As the guy i crew chief for is still grass roots despite being pro rank. good driver, but car is underpowered and outgunned. i wish he would go german, as i could get a mercedes or bmw shell for free and build a sick v8 german car. just a mater of funding. As for other cars, some people are grass roots and "wing it". they are generally the cars that quailfy but dont get far if they do make the field. the top cars are all professional decked out pits umbrella girls etc etc. most of these top teams have a tool sponsor of some sort too.
the rally guys i help out are more or less grass roots. the pits are a miss mash of everything. top level rally cars have amazing build technology and their paddocks are well stocked. i have an ex-pro level rally car rotting away in my yard that was built over 10 years ago by rod millen's ex crew chief. the attention to detail rivals a lot of other motorsport builds in other disciplines that are being built today. sad thing is, this car is way outdated by rally standards. it is a shame that it is rotting away in my yard. but the owner of the car is dellisional on price to buy it being cage is outdated as is most safety stuff--not to mention just not competitive anymore. My all original and rust free urq was sitting outside my house while this car was inside my garage. F-that. So my audi has a inside spot and let his car rot. i'd love to plate it and drive it on the road though. dog box on the street for the win!
on the Ducatti mechanic's boxes! I was shaking my head looking at the drawers with the dial gauges and the pile of T-handles in that one drawer. 
