ORIGINAL: splcrazy
increasing the bolts diameter would help , but id prefer to have two bolts on the pinion instead of one in the middle , they should make a pinion and bell so you can put two bolts in the pinion to the bell , so instead of one bolt in the middle it would be two bolts on both ends , this would stop the pinion bolts getting loose and hopefully stop pinion bolts snapping
You keep bringing this up so let me address this for you, do you have any idea how much you would weaken the 'key' on the bell by doing this? Well, you would render the key completely useless and actually reverse the affect you are looking for. Screws are not structurally strong in a rotational/shear situation, that is why there is a key, now you take and drill 2 holes in that key (keep in mind that the holes would be the 4mm and the key is 4mm), outbound enough to fit 2 screws, you might as well remove the key completely. That one key has far more strength than 2 screws could ever have, so without the key, you would be breaking screws all the time. Sorry to tell you, 2 screws is not the answer for more than just this reason. Let's take a look at all the pinions available for the Baja, they are all designed for single center screw, so, you want every manufacturer to change over to a 2 screw, weaker design, this would include HPI changing their whole design too?