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Ty80 Engine - Help

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Well............ 3 days gone and second post for help on the TY80 Rebuild !

On the left hand side crankcases (flywheel side) below the carb there is a 14mm threaded hole which goes into the crankcases. On the bike I have, there is a plastic threaded piece with a small hose attached screwed into the hole ? On looking at the Haynes Manual, I'm sure the hole is for the 'indent plunger' which runs on the selector mechanism ?

Any ideas why mine is as it is ?

Apologies for no photographs - hopefully the TY80 gurus out there can figure out what I mean and advise !

cheers

John

Ps - my estimate by the end of the rebuild will be 20+ posts........and there's no way I can move Christmas day to accommodate any major problems !

maybe they lost it an didnt fancy a hole in the crank case for the dirt to get in.

TYtrials would be able to supply detent ball, spring and bolt I would think

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