I learnt this off ttrsteve when he was here on Monday.
To prevent water/moisture getting into the airbox when power washing with the seat of, put a glove over the snorkel
I used to stuff rags in there but this is such a better idea!
The other glove fits nicely over the exhaust if you haven't got a bung for it
I would still recommend starting up your TTR and taking it for a spin to thoroughly dry out the engine and chain after a wash.
My routine is:
a) power wash whilst still wearing my riding gear so I can wash myself down as well,
b) wipe down seat and panels with old towel,
c) take TTR for a ride and fill up with petrol on the way,
d) put TTR on stand and select 2nd gear and run chain saw oil on the (now warm and dry) chain,
e) wait until the TTR has cooled and spray the whole bike (other than seat and grips) with WD40 or equivalent. I buy 5 litre cans of army surplus water repellent/lubricant so it's a cheap way of keeping rust at bay.
A Devon TRF member from South Devon area (salcomberider) occasionally advertises the PX24 (used to be £5 for a 5l tin) on the DTRFG forum. Say how many tins you want and pick them up at the next DTRFG event.
I dry the bike with a two stroke leaf blower, does well and the exhaust from the blower is mixed in with the blowing air. Puts a nice light oil over everything.
I tend not to use a high pressure water cleaner (can take grease out of bearings etc).