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CB 550K3 Cap Head or Not Cap Head

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royhall:
If you put cap heads in go easy with the allen keys. You can get far more torque on an allen key than you can on a screwdriver, and you will easily rip the threads out of castings. Also, if you use stainless screws lubricate the threads with copperslip or a more modern anti seize paste or again the threads will tear out as you remove the screws. Best to put a small dab under the head as well. I nearly always use stainless cap heads with copperslip and I haven't had a problem yet. Fingers crossed. :-\

mike the bike:
One one engine I restored,  I used stainless button head screws.  The heads are less obtrusive than the standard cap screw and look more like the original screws.  They need a smaller allen key, so it's less likely they'll get over tightened.  For an M6 its a 4mm key rather than a 5mm. 

matthewmosse:
Button heads are needed to clear the valve caps really from what I recall, at least in some places, but they are really easy to round out the heads on, but the fix is eqally easy, just tap the rounded button head with a hammer and gently knock the allen key back in. For everyday ease of use I prefer cap heads, especially on a daily use bike, also allen keys are easier at the roadside, especially the socket cap type, just use so the short arm is giving the leaverage. I do use pan heads if I have enough the right size to do the whole job or at least the whole cover but that is because I am tight and lazy and would rather make do with what I have then spend actual money.

paulbaker1954:
Check out inox fasteners in Southampton they do cap head sets at good prices and the owner is really helpful www.inoxbolt.co.uk

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