West is a good rider, and is always good in the rain. That says a lot about his riding skills. You can not doubt a rider when he's fast in the rain.
Rain levels the participating machinery. Sure you can attribute a lot to just simply having the guts to go fast in the wet, but guts isn't enough to stay upright on the bike and not crashing. You simply cannot defy luck in a wet session every time and not crash.
That bike is simply rubbish, and will never get a decent result under normal circumstances. The lead rider, Hopper in this case, should give everything to get their facts straight to develop a winning bike. Nakano was close to developing a decent bike a while ago.