Advice please on rebuilding a 2005 Monster

Hi Everyone,

My godson and I have just bought a 2005 Monster 620 Dark - 02, with a V5 & all the paperwork from the previous owner, in 4 large wooden crates.

We have unboxed everything and are starting to clean and label all the bits, ready for a full rebuild. It has been boxed for about 5 years.

The engine turns and it looks like we have a complete bike. We have ordered a Haynes workshop manual.

Our plans are:

Drain engine oil and replace. What oil please?
Replace cambelts, plugs, air filter, fuel pipes, battery? Where to buy these parts please?
Remove alarm to stop noise and immobiliser kicking in when we come to start it?
Replace 2013 dated tyres?
The spark plugs are old Champions RA6 HC & RA4 HC - are these correct, or can any UKMOC members suggest best plugs to buy please?
We need to replace 4 badly corroded exhaust studs. Cann we use studs from local nut & bolt shop?
Cambelts are labelled 190 187 5 208 DS & 153 5 208 DS - can we just order 2005 Monster belts?
Replace belt tensioners or service & keep?
The injector packs have been cleaned with carb cleaner - do we need to strip and rebuild like an old carb, or should they work OK with new fuel please?

ANY ADVICE WELCOMED PLEASE?

We live in Norfolk - Any MOC members live near us who would like a look at it over a cuppa and biscuits?

Thanks in anticipation.

Richard & Hamish