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Thread size and pitch RT Desmo decompressor
Posted: Thu Oct 05, 2023 6:10 pm
by IanHood
Does anybody know the thread size and pitch of the decompressor hole in a 450 RT Desmo head? I don’t want to use a decompressor but need to find a suitable blanking plug.
Ian
Re: Thread size and pitch RT Desmo decompressor
Posted: Thu Oct 05, 2023 6:48 pm
by LaceyDucati
Ian
M10 x1mm the same as a 10mm spark plug.
Nigel
Re: Thread size and pitch RT Desmo decompressor
Posted: Thu Oct 05, 2023 6:56 pm
by IanHood
Thanks Nigel - so I’m thinking of using something like this with a copper washer. That should be fine I assume.
Re: Thread size and pitch RT Desmo decompressor
Posted: Thu Oct 05, 2023 7:07 pm
by IanHood
…and by the way Nigel, I received the springer head back today. Here’s another advertisement for you - a lovely guide and valve job but I would defy anyone without a microscope to identify where you carried out the welded repair to one of the valve cover bosses. Outstanding work!
Ian
Re: Thread size and pitch RT Desmo decompressor
Posted: Fri Oct 06, 2023 6:48 am
by LaceyDucati
Ian
Glad you are pleased with the work and thanks for your kind words.
That plug should work. It will leave a small recess in the chamber, but as long as it's no worse than a second plug or decompressor, I'm sure it won't cause any issue.
Nigel