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Messages - OtoHNS

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zx50 / Re: Tire size
« on: August 11, 2009, 05:32:36 AM »
I just got the 120/70 Michelin Bopper tires x 2.
I'm going to see if that size will fit the front.
I'm going to try to put them on myself this weekend manually (using tire irons) although I'd prefer to just purchase one of those motorcycle tire changers...

If I get time, I may try to take some photos so you guys can see.

2
zx50 / Re: How to derestrict the Kymco ZX50 Super Fever 2 stroke
« on: August 04, 2009, 05:10:33 AM »
Another quick update,

Replaced the ignition coil to one I purchased on e-bay ("race ignition coil") and the spark plug.  It was appalling to see that the old spark plug tip was almost completely rusted.  I wonder whether any of the former owners ever even touched it.

Performance changes?  To be honest, I don't think so.  Maybe a tad bit smoother early acceleration?  But more likely just my whimsical wish.

So what's next?  Drive belt and clutch springs.

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zx50 / Re: How to derestrict the Kymco ZX50 Super Fever 2 stroke
« on: August 04, 2009, 02:12:42 AM »
So I've concluded that I've got the derestricted CDI.
The only reason why it's so slow (30 mph) is because I think the variator/clutch/belt needed some TLC.

I opened the case for the variator/clutch to find a TON of worn down belt particles and a little rust here and there.
Today, I replaced the old variator with one I found on ebay for $33 (including shipping).
Immediate improvement - perhaps a little better acceleration and increased top speed from 30 mph to 35-37 mph.

Next will be new clutch springs, perhaps new clutch compression spring, and if that doesn't work, maybe just a whole new clutch.
Also coming will be a new drive belt and power coil.

I'll post any improvement in performance each step of the way.
Replacing a variator/clutch is much easier than I thought.  10-15 minutes is really all it takes with some tools.

4
zx50 / Re: Newbie looking at a 2000 sc10as ZX50
« on: August 04, 2009, 02:06:50 AM »
There are little bits of information here and there on the internet, but not much.

I just recently bought a used ZX and am right in the middle of making upgrades.
I've purchased most of my upgrades from e-bay, although I did just recently (today) buy a drive belt from Mopedhospital.com.

5
zx50 / Re: How to derestrict the Kymco ZX50 Super Fever 2 stroke
« on: July 26, 2009, 01:56:09 AM »
I must have a slightly different version of the CDI as I only have 5 wires coming out of the CDI box and only one green one.  It's exactly the same as its described in the Italian-English version of the owner's manual that is floating around.  Which makes me wonder if my scooter is a non-US version.

Having said that, I'm still not satisfied with the max speed of 30 mph so I'm going to try some cheaper mods besides re-cleaning some essential parts (carburetor, oil injector) etc..

I see some relatively affordable parts on ebay which I'm also thinking about getting, i.e. race variator, race coil, race CDI, possibly race clutch and springs.


6
zx50 / Re: Brake upgrades?
« on: July 25, 2009, 09:54:18 PM »
I agree about changing the brake fluid oil - that was exactly what I was going to do next.

I have never tried braking on some of the other scooters, but the thought of having sportbike like braking ability on a scooter sounds great.  I may have to customize some sort of braking system if I ever get the time to do so.

7
zx50 / Re: Brake upgrades?
« on: July 25, 2009, 04:07:25 AM »
Thanks for sharing the information.
It may just be that I'm not used to the braking ability of scooters.
Still, it would be nice to get a little more braking power.
I bought a scooter that had literally been sitting for the last 6 months so I'm going to do an overall clean and reassemble before I start buying replacement parts.  But it definitely helps to have some input and direction.   :)

8
zx50 / Re: How to derestrict the Kymco ZX50 Super Fever 2 stroke
« on: July 25, 2009, 03:25:38 AM »
Thanks Shaka. 

I'm curious.  Besides the big bore mod, which of the mentioned mods helped with acceleration most (not top speed)?

9
zx50 / Re: How to derestrict the Kymco ZX50 Super Fever 2 stroke
« on: July 24, 2009, 06:26:55 AM »
When I pull my CDI out, I only see a dark green wire coming out.  Where's the light green one?
The electrical section of the manual doesn't seem to describe a light green one either...  Am I missing something?

10
zx50 / Brake upgrades?
« on: July 24, 2009, 02:00:30 AM »
Does anyone know whether there are upgrades to the brakes?
Better brake pads, lines, etc?

My ZX (just picked it up 2 days ago) is bone stoke and can only get to 30 mph (CDI modification and new variator coming) but I'm more concerned about the total lack of braking power that I feel the scooter suffers from.

11
zx50 / Re: Tire size
« on: July 23, 2009, 04:03:07 AM »
If a 130/60 rear rubs, I will give up on thinking about a 130/70 on the back.

The other option I think I could try is a 120/70 for both the front and the back.
There is no way the stock front fenders wouldn't get in the way, so I'd likely have to remove it.

Once I get them on (probably won't be for several weeks), I'll let you guys know.

12
zx50 / Tire size
« on: July 22, 2009, 04:59:51 AM »
I've noticed there are several tires that I'd love to get only if it fit i.e. Michelin Bopper (120/70F, 130/70R).

Seeing that it's only a tad bit wider than the stock (110/70F, 120/70R), has anyone tried fitting a slightly wider sized profile tire on their bikes?  I'm an avid motorcycle track rider and have successful experience with playing around tire sizes to affect handling characteristics.  In the case with the scooter, I'm more curious about clearance issues.

On a second note, seeing that there are no threads on tire choices, what kind of tires have you guys used?  Any comments?

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