Hi, I'm riding a honda wave (early version) and I would like to know

1.how much the cost of converting the front drum brake to disc brake

2.What is the best size for the front tyre. Right now I using a big tyre pretty much like the dunlop tt and the handling suffers a bit especially when riding at slow speed and while carrying passenger. What tyre do you recommend?

3. What is the best rear shock absorber for my bike. of course, it must be affordable. right now I'm using rm 30 china made shock absorber and everytime when I try to turn or taking corners I feel like it start to lose some balance a bit.

Really? Eventhough it is meant to improve the motorcycle braking capabilities?

Have you guys noticed that there is a trend to have a NOS like sound on motorcycles when braking? What are your opinions about it? For me it's kinda like annoying and stupid.