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I’m with you on that Peter. I operate a complete media blackout on race days (bikes and cars) if I haven’t watched it live.
Germany is quite a diversion! I have never ridden or driven there. Only over a passenger in hire cars or taxis
Managed to get 240KM/h out of the hire car there last week (a new record for me)
Sounds fuel related to me. My guess would be gummed up/blocked carb (especially if its been standing for a while) or an air leak.
Check for air leaks – once you get it running spray WD40 around where the carb joins the barrel if the engine note changes then you have an air leak
If not time to strip down the carb and very thoroughly clean it. Finding someone with an ultra sonic cleaner would be best. Be very careful when stripping it down not to strip threads etc and take loads of pictures so you know how everything goes back together. There will be a lot of very small holes both in the jets and main body and all of them need to be cleaned.
you’ll need a gasket set at least:
https://www.derbiscooterspares.co.uk/spares/partImage.asp?GPN=00H04103771&uid=0
https://www.adrenalin-pedstop.co.uk/p-Dellorto_PHVA__PHBN_carburettor_gasket_set-5714.aspx
