The switch gear has little locating pegs to stop them rotating. Measure and then measure again and then measure a third time before you drill the holes to locate them.
Owner of Motorcycle Republic, Specialist in unfucking things that others have fucked up.
They only need shortened if you do lots of commuting and filtering and feel that you want extra clearance.
Otherwise enjoy the extra leverage.
Apparently the type of material they are made of makes it unwise to cut them as it potentially weakens them.Prob makes no difference in reality.
Apart from that if you use the search tool there's lots and lots of recent advice and pics on fitting them. 8)
Easiest way to go fast........don't buy a blue bike
video is also of use to e cheers
I wouldn't want to drill holes in my handlebars to be honest. File the plastic nub down a little then put a bit of silver foil under the switchgear, holds mine in place just fine.
Eagles may soar, but weasels don't get sucked into jet engines...
I also filed off the locating tabs, never had a problem with rotating..
I always did drill 'em rather than file off the lugs just incase i had a change of heart n wanted to refit the originals..
Better to have it and not need it, than to need it and not have it..