Topic: CB750 round tops; bowl drain screw thread?

[Garage_guy_chris]

Hey guys im sitting at work and need to know what the thread size is on CB750 round top bowl drain screws? I imagine its either M5x0.8 or M6x1.0

I want to do the clear tube test and had a thought about how to make some fittings using the drain screw holes to hook the clear tube too

[harisuluv]

i think it's an m6.

[dusterdude]

Its a bastard 6mm but i dont recall the pitch at the moment

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[dusterdude]

I think its 6x.07

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[evanphi]

Get a spare drain screw and cut off the big part. Then press it into the end of some 1/8" clear tube.

[dusterdude]

Check with cal on the hose size,when we checked mine we stuck the hose in the hole,worked out good

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[Garage_guy_chris]

When i got home from work i took a look at some loose ones the thread is a metric fine M6x0.75 it is a dead thread pitch from what i can tell i checked on McMasterCarr and nothing, called my local bolt and hardware supply shop and they had nothing chain wide...

I was planning on getting some bolts drilling them out running a nut down to the shank and bingo have some spigot tap things to check fuel level but its a no-go