Mr. Kong, it was me that you were talking to that day. 

Many riders have the perception that disc brake is better. Both systems have their pros and cons. Look at it this way, the V-brakes have a friction surface all around the rims, both side. That's almost 406 cm x2  and that's 800 cm of braking surface. As oppose to disc brakes it is only 46 cm X 2 and that's only 92 cm braking surface on a thin disc. The disc brake works better, stops faster BUT can you wrist pull the levers hard enough? Have you seen brake disc running on cable on cars or motorcycles? Off course not. It needs a lot of force and the only solution is hydraulics! That's why any hydraulic disc brakes works better than the V-brakes. But you can't fit the hydraulic system into folding bike because the hydraulic hose cannot be folded to tight. So, they went for the first generation disc brakes, a cable actuated one which requires you to pull hard on braking.

If you don't fold your FIT often or never, you can actually change to hydraulic brakes, it's so cheap nowadays. Jimmy can put one in for about 200 bucks. Or maybe, fold very carefully, taking care of the hose. It can be bend but not very acutely. You know, you are already praising the V-brakes on the Dahon and that statement actually confirms how bad mechanical disc brakes are. The V-brakes you have , there are actually many more better quality V-brakes and some even cost more than the hydraulic disc brakes.

Go back to Jimmy and get a set of wheels. Since you said the seal bearing makes a lot of difference, it should actually.    Then you can go for either 8, 9 or 10 speed. For 8 speed you can still use back the old rear derailleurs. You just need the shifters and cassette. A Shimano Accera systems should be OK but nothing stopping you to go for better ones. I suggest MTB gears as they are cheaper and they have bigger rear cassette. Easy to ride    I must warn you though, 9 or 10 speed, the biggest a 20 inch wheel can take is 32 teeth at the rear. Happy riding!

Nope, you have to get at lest 8 speed. Once you change the wheelset, the freewheel is cassette type and the minimum is 8 speed. If you don't like the RD, you can change the RD now without changing the wheelset. Changing to 8 speed or 9 speed or even 10 speed gives you more higher gears as the cogs starts from 11tooth as opposed to your 7 speed now which starts from 14 tooth.

i used this type of wheelset
http://bicyclebuysell.com/item/298935/dnkd-20-quot-wheel-set

and yes,its sealed bearings already.the stock bearings is good,but i already change all the bearings

if im not mistaken route are JDM for vybe.if yes,maybe it comes with neos rd?
so in conclusion the route still using freewheel hub,so the 7 speed cogset cannot be used with the freehub wheelset.so in terms you need to upgrade ur rd,shifter and bought casette for it (do correct me if im wrong).

No, you can keep the FD on hold first. You need to get the shifters which comes in a pair, both L + R. So , you just use the right hand side first and keep the L for later upgrade for the FD.  I suggest going for 9 speed first. So, Accera RD , 9 speed cassette, Accera 9 speed shifters, a set of cable and housing, 9 speed chain and the wheelset off course. That's about RM400 and add another RM350 for the wheelset, it's RM750.

For folding bikes, most if not all try to minimize their selling price by cutting cost on the OEM components. Needless to say, most are already made in China. As for your question, YES, it does make a difference but quite minimal. The hubs and of your Route is the basic cone bearings  and uses hubs with freewheel on the cogs. These kind tends to wobble a bit and at times gear shifting are not crisp. That's why they can only go to 7 speed and there are 8 speed cogs, that's the maximum I have seen. Because the tolerance level of the 8,9,10 and now 11 speed are so minimal, these old freewheel at the cogs system can't be used. That's why the cassette type was invented. SO, in other words, the cassette type hubs performs way better than the old system in terms of gear shifting. Your basic rims are single walled, they are light but not strong and after a few hard knocks , the alignments goes out of line and it wobbles. The Speed P8 uses double walled rims, hence, they are better and as they keep their shaped better, they rolls better.

Riders are lucky now as the after market components are getting cheaper and easier to get. 3 years ago, you need to order online just to get some parts and those days, to change a wheelset will set you thousands. The price was higher than the bike itself! 

I know, it's hard to justify changing to better components so, just consider carefully your interest in the activity. Will you use it a lot? If not, stay with the present and if you want to mod, go all out ( at least till the major improvements), don't just change a few minor items and this doesn't affect the riding comfort at all. One thing I do notice is, if you don't upgrade, the money seems to flow in other direction and you still spend it and if you did, the major improvements will be there year after year. 

my raleigh foldie right is back,left is front

You can change sides if you so wish. Some wants it the other way some wants it as what the shifters are. Right shifters shifts the back gears and so does the brakes and same goes with the left shifters for front gears and also the brakes. Once you get used to it, make sure you stick to the same side because in my case, I use the rear brakes more. Rear brakes to slow down and front brakes to stop. Before stopping you have to slow down. Too much front brakes or only front brakes will bring your tail up and your head down onto the tarmac!   Also when you brake front and it skids........... nothing you can do to correct it and you will fall and if rear wheels skids, you can still control.

As a guide , usually the right is for the rear brakes. 

I found this to be true for continental bikes or those made for that market.  The Brompton and Bike Friday are certainly that way. 

Why? Must be to do with Left or Right hand drive! 

This is a China made unit, at least that's my guess. Only brought in by GS Bikes in Kota Kemuning. Careful of Gary though, he's not very honest. Dealt with him once and he sold me a faulty product which he did not want to replace. Also a fellow rider bought a Dorcus mini velo from him and he didn't do the final inspection and the left side crank came off when she did the first ride. Most of these importers ordered their products from Taobao.

Here's the link. Only Renmibi 1600. How much is he selling?

http://item.taobao.com/item.htm?spm=a230r....bucket=8#detail