If it's still stock, they aren't Allens, they're #3 Phillips .....
If they've been replaced with the Allen bolt kit (or modded stock screws), they take the same 5mm size as the covers do .....
With all due respect 5Twins,
NOOOOOOO....NOOOOO.....they're
not #3 Phillips - they are #3 Japan Industrial Standard (JIS) screws - as are everything else on every Japanese-built car, bike, VCR, toaster...etc.
It may not seem like a big deal - but note how the JIS screw in middle of 5Twin's photo of five clutch basket screws is all chowdered - that is because someone used a
Phillips driver on it. In fact, if you look carefully, the heads of nearly all of the cross-head screws on nearly all Japanese bikes are chowdered - and that is because nearly everyone used
Phillips drivers on them all these years.
PLEASE BELIEVE me when I tell you that using a JIS driver is much more effective and you will stop damaging the screws.
If you use a
Vessel IMPACTA #3 impact drive (
see photo below - the #3 IMPACTA is the big silver handled lad second from the right) - those clutch screws will be off quicker than a bride's nighty.
You can get a full set of very high quality "
Vessel" brand
JIS drivers on the interweb for not much money or you can order an equally nice set from
www.gofastinnovations.com and either set will look very fetching in your tool box.
The only wrinkle is that
gofastinnovations.com does not offer an impact driver like the silver-handled
Vessel IMPACTA - but rather they offer a set of bits that can be used in an impact driver (and these work fine too - if you have the correct impact driver handle).
Oh dear me - am I becoming obsessed with this issue?
Pete