That does seem to be a lot of oil so yeah - get it fixed before it REALLY blows up and leaves you stranded some where. Not sure about the UK but here, a new crate engine is cheaper due to less work - no messing around trying to find the problem to begin with.
As for the bike - I'm not 100% sure but think it is a Carby issue or just a tune up, something it hasn't had for awhile. Last year I changed the exhaust system from the nasty HD slip on to Vance and Hines full exhaust with an S&S Air Cleaner Kit. Changing those things has effected the tune of the bike, I think. I probably need one of two things - a new S&S Carby ($450) or put a rebuild kit through the stock carby and keep my fingers crossed. I've only just ordered new Plugs and Leads to start with.
At the end of the day though - I'm going to have to find a mechanic that can work on the bike - you want a laugh (that aint so funny)? HD will not work o the bike because it is older than 10 years old. Bottom line, their parts replacers (aka so called frickin mechanics) don't know how to fix something that needs a mechanic - they can't just plug the bike into something, sit back and charge me $90 plus an hour for the privilege
Problem is "real mechanics" know that HD wont work on them so they (naturally) take advantage of that as well
Anyway - bottom line is the bike runs like a PIG at the moment so I need to get it fixed, whatever the problem is.
Yes, you'd be well advised to take Smudges advice and NOT mention that "H" word ................. BUT, I am now putting together a new and improved "air bridge" - one that replicates a rope bridge in an earth quake. Once I have perfected it, I'll send you one if you like
