I'm fairly new to this bike despite it being a 2008. I don't know where the feed line is or what a banjo bolt is. I have worked on and rebuilt jap bikes all my life, so this bike is a whole new learning curve in my senior years. This engine is a collection of older design and newer design all mixed together. I'm not a fan of keeping older parts just to maintain an old look. The right side of my engine is complete mystery to me with that bulbous gear train to a non existent distributor. There are two covers in this case, one facing forward and another just opposite facing rearward that have no explanation anywhere that I have found. I really need a shop manual because the owners manual is a joke. There is a whole chapter about how to wash this bike and very little on oil change or even where the oil filter is located. I'm wondering if I will be required to overhaul this bike every 3-4 thousand miles. I have so many questions about this bike, but they could really be answered quickly by an adequate manual. I'm not a young man anymore and the idea of having to dismantle this bike like I have done just to change the oil is a staggering thought. If I had the money, I'd probably move on a to a Guzzi or BMW, but this RE was free. All I had to do was to give it life. It is fun to ride and I get many compliments.
I'm sorry you're having so much difficulty.
I bought my '08 Classic brand new in December of 2010. It had sat in a back room of an out of business dealer for two years. It was drained of fuel, no battery & every single bulb including the flasher was blown. Cosmetically it was perfect. Although I have ridden all my life (I'm 75) I knew NOTHING about this Royal Enfield machine. I had to research & learn everything from scratch by getting manuals, finding everything possible online & starting to learn from the people on these forums. Plus many hours in the winter I just sat & stared at the damn thing.
One of the manuals that helped me tremendously was Pete Snidal's manual plus we personally communicated & he helped me through the electrical madness. You need to go to NField Gear (on the homepage) & get his manual. It will help you tremendously. If you're like me you will want it in book form (spiral-bound) which is Part #Z90495.
Banjo bolts are what are attached to the upper part of the engine & feed the oil to your rocker arm covers. The silver colored tubing that come out of the front of the engine & runs up the right side goes into a Y & terminates at the banjo bolts.
The whole attraction of this bike (for me) is that the old is blended with the new giving me a bike that is modern, but looks exactly like a 1955 Royal Enfield. That's why I started looking for one in 2004.
One of the best things you can do for yourself is get Pete's manual.
PS: I, too, am pretty crippled up. I have not treated myself well plus I have genetic joint problems that are now eating me alive. My bikes (& my frigging lawn) are the only things that keep me moving & fighting the pain. I find ways to minimize working on the floor as much as possible. I will keep my two bikes until I can't kick them over any longer.
And I love this damn old fashioned RE to death.