Author Topic: Rounded head  (Read 2927 times)

Offline masonmart

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Re: Rounded head
« Reply #15 on: April 06, 2016, 12:11:19 PM »
I had the same problem with every phillips head screw on the bike.

Therein lies the problem, they're not Phillips screws, they're JIS! Using a Phillips driver will cause it to 'cam out' and slip if any serious torque is applied.

This page explains, with a diagram.

http://www.vesseltools.com/hand-tools/screwdrivers/jis-japanese-industrial-standard/view-all-products.html

After taking all the allen screws out of my bike and going back to the OEM silver chocolate ones, buying JIS screwdrivers was essential, I found a reasonably priced pair on eBay.

Yes understood but I call them all Phillips screws. I had the right bits for the impact drivers and screw drivers so rounding wasn't a problem only getting enough torque on them to move them. My bike and engine were seriously corroded though.
Dresda CB500-4, 605 cc
CB-77, 350 cc
1968 Bonneville
1976 Thruxton Velocette
1974 Kawasaki Avenger
1997 VFR 750

Offline mike the bike

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Re: Rounded head
« Reply #16 on: April 06, 2016, 03:53:40 PM »
If you grind a small amount from the tip on a PH2 it will fit a JIS without camming out.
Where's that 10mm socket got to?

Offline Carb17

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Re: Rounded head
« Reply #17 on: April 06, 2016, 11:18:12 PM »
Thanks for everyone's help , I'm sure it will not be long until my next post !

 

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