Motorcycle Repair: 1982 CM450E HONDA jingling while freewheeling, auto bulbs, clutch lever

Question
Bought this used cycle from a friend 150 miles away,(3 months ago, 2200 miles so far)  and I've got no HONDA dealer nearby. The bike runs well, but when pulling in the clutch and coasting in high speeds (like coasting to a stop light on the expressway)I hear a jingling sound. Could this be the chain? Is this a symptom of wear or adjustment needed? How do I do that, or should I even attempt it?

The headlight is probably original, but the prior owner hard wired the light to be on bright at all times (switch defeated). I ride 40 miles after midnight every weekday, and feel that the light could be brighter, or wider. How do I find a replacement when I can't find ANY reference to a CM450E on the internet?

I have the sense the friction point on the clutch has moved, and now even when pulling in the clutch handle all the way, the cycle never comes completely out of first gear. As a result, I almost always have to start in first gear, with some surge forward when the motor catches. How is this serviced? Can I do it, or should I find a shop?

Finally, when applying the foot brake, it sometimes feels like the cable hangs up, and when it pops free, the brake surges, throwing the rider forward. How is this serviced?

Answer
It could be the chain is causing the noise. First make sure the chain has the right tension and the rear wheel is aligned. I use a straight piece of aluminum angle stock to check the alignment of the chain and the rear wheel. I put the angle stock against the rear tire and follow it along the chain. Also look for tight spots in the chain and check the chain for too much stretch.

Another common jingling sound is the clutch and brake levers rattling while you coast.

These usually take standard auto bulbs. You can try a brighter bulb.

The only adjustment for a clutch is the clutch cable play on the clutch lever. Make sure you have 1-2mm of play at the lever. No more, no less. It's possible the cable has started to break so check the condition of the cable carefully and replace it if more than one strand has broken. A hard to shift bike is also possible if you use a heavier than normal oil or if the bike is cold.

Rear brake binding up is very common. You can try replacing the return spring in the brake housing. Also check the condition of the brake shoes and replace if they are worn. If it uses a cable, make sure the cable is not rusted.