Topic: replacing the swing arm zirk w/ metric: 6 or 7mm?

[grumpy]

I'm gonna replace the OEM swing arm grease nipple.
Most people seem to use 1/4"
I have no use for a  1/4" tap but I do use metric - so I was gonna get a metric tap and zirk.
Should I get 6 or 7mm?
6 is a bit under 1/4" and 7 is a bit over... which would work best?

<-------  750K3

[kerryb]

the easy route seems to be , will there be enough metal to tap after drilling the pilot hole for a 7mm tap?

[City Boy]

Hey Grumpy.I just put new fittings in a pal's 750 swing arm last night.I used 6 mm.Slight drilling required first to get sizing prior to tapping.   Rock On

[City Boy]

Maybe I spoke too soon.Are you replacing the single fitting style or type with one at each end of shaft.I did the twin type.

[grumpy]

I have one at each end - early K style.

IIRC the later Ks had a single one in the middle - right?.

[City Boy]

Not sure,but I also have installed one in centre of arm on same machine.  Rock On

[grumpy]

What size drill did you use for the 6mm?

[lone*X]

Grumpy, Google is your friend:  Searched " what size drill for 6mm tap "  and found:

http://www.kramerusa.com/DrillTapChart.htm

[tomkimberly]

Standard tap size for grease fittings is 1/8"-27.

Tom

[grumpy]

Grumpy, Google is your friend:  Searched " what size drill for 6mm tap "  and found:

http://www.kramerusa.com/DrillTapChart.htm

That's a useful resource.
Thanks!

[Flying J]

Good to know. I need to change the zirk on 2 of mine and all my taps are metric so i figured i would just use the 6mm zirks i have already.