MK 111 Primary drain bolt reversal .

Torontonian · 2026-08-08T18:43:42-0600

Tonight I've decided to reverse the MK 111 primary outer cover drain plug bolt position . The head touches the pipe and vibtates on it . If I put the head side on the interior will there be room for it's head inside ? I'll use sealant . I never use it anyways .

Britbike850 · 2026-08-08T18:57:27-0600

On my MK III…a button head bolt allowed my pipes to clear
Rod

Torontonian · 2026-08-08T19:26:34-0600

Britbike850 said:
On my MK III…a button head bolt allowed my pipes to clear
Rod

Thread size for that ? Allen head ?

Torontonian · 2026-08-08T19:33:55-0600

Torontonian said:
Thread size for that ? Allen head ?

Bolt is out and threads cleaned . I could just fill up the threaded hole with JB Weld . The cast protrusion could be ground away to flush I'm thinking too .

L.A.B. · 2026-08-09T01:13:28-0600

Torontonian said:
Thread size for that ?

Drain bolt thread is 1/4 UNF.

Andover Norton - HEX. SCREW 1/4

HEX. SCREW 1/4

andover-norton.co.uk

Torontonian · 2026-08-09T13:28:31-0600

O.K. , reversed the 1/4 Hex Screw , using Hylomar on threads , after cleaning . The casting face , ( interior side ) , is not a flat face for the Screw head to find home . Lots of thread for this screw . Not worried about that , all is tightened down , with the Hylomar .
Now to refit the cover , too hot out . Later .
Enjoy .

360 Twin · 2026-08-09T16:25:29-0600

Add spacers behind the exhaust nuts, such as crushable exhaust rings, and rotate pipes for more clearance...

Torontonian · 2026-08-09T18:01:54-0600

360 Twin said:
Add spacers behind the exhaust nuts, such as crushable exhaust rings, and rotate pipes for more clearance...

Job done . Reversed the protruding Screw . Hylomar sealant on threads . . Fit of cover was perfect and no touching of any primary internals . Started up fine with no more vibratings to L.H. pipe . Yay !

Saber · 2026-08-09T20:51:29-0600

Are you still out on your trip?

MK 111 Primary drain bolt reversal .

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