Chewed Master Cylinder screws

[Slacker24seve...]

Chaps,

The screws on the top of the reservoir/MC on the other half's Hornet are chewed. I've been soaking plusgas in to no avail. Is there anything else I can do before I bin it?
____________________
Triumph Daytona 675 track bike + girlfriend's Honda Hornet 600
Selling a hack/winter bike for less than a grand? PM me.
Banger rallies are ace

[Islander]

Try using a punch and hammer to drift them round first. If you really can't shift them then just drill the heads off carefully and use molegrips to remove the remainder. No need to bin it - this is quite a common thing.

[........................]

Mine were bad, a quick whack with an impact driver and they came out no problem. I know some people on here say don't do that on a master cylinder as you'll damage it but as as long as you're not going to town on it it will be OK.

Replace the screws with allen headed screws.

[stinkwheel]

I just drill them if they are badly burred. Easy-peasy.

They chew up partly due to the crappy materials, partly because they're a water trap and corrode but mostly because almost everyone uses the wrong screwdriver. Most of them have JIS heads and most people do not own a JIS screwdriver.

A blob of silicone sealant on top of the new ones will help prevent water trapping/corrosion on either an allen head or a JIS crosshead.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[deeds]

[stirlinggaz]

hi,
usual honda issue, due to someone using incorrect screwdriver (jis)
4mm hss drill bit (titanium or cobalt unnecessary with these soft bolts) & remove the heads.
lift off m/c cover & remove bolt stubs with grips.
fit nice new countersunk bolts with non jis heads. i used standard machine screws with slotted screwdriver for ease of removal in future.
done it sunday on an nsr.

cheers,
GAZ

[roadracejoe]

Where can i buy proper jis screwdrivers? Seem to be an american thing

[andyscooter]

amazon and ebay have them but cost about 12 quid for a screwdriver
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gilera runner vxr200 (chavped)
if its spelt wrong its my fat fingers and daft auto correct on my tablet

[stinkwheel]

You almost certainly have a JIS screwdriver in the bike tool kit.

Not something they seem to sell in the UK.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Nobby the Bastard]

Impact driver and lump hammer.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Commuter_Tim]

[Shaft]

[deeds]

[........................]

[deeds]

Sorry but that's a link for 4mm Countersunk Bolts M4 X 10mms

[Raffles]

How about these ones?
____________________
A good loser will always be a loser.

[roadracejoe]

If jis are only used on Hondas then I should be OK, as both my bikes are Yamaha's

[Raffles]

[Shaft]