The tool works. Yesterday I have changed the belt on my gf's A125 -
http://www.kymcoforum.com/index.php?topic=1493.msg46031#msg46031 - and today I have changed the roller weights and the belt on my P250S.
You can change the belt on A125 without removing the clutch but it seems it is not possible with P250S, because you cannot compress the clutch with your hands in order to pull out the belt, there is no space between clutch and the outer vario casing. So I had to remove the clutch too, inspect it, clean the dust and put everything back. Service manual shows the same. The rollers and belt were in quite good condition after 15.000 kms (OEM belt was Mitsubishi made, the new one is Dayco, as you can see, they are the same). Unfortunately, I have purchased some Chinese crap roller weights, they have some kind of plastic surface that can roll around the metal core?!? This crap cannot last, I bet they will shred to pieces in no time. I have another set of 19g rollers (OEMs are 21), so if they go bad during the summer, I will use lighter ones until I buy some decent rollers or even Kymco's as their quality seems to be supreme.
Oh, yes, there is NO WAY to loosen the nut on the face plate where rollers are, or the one keeping the clutch in place. I tried standard 40 cm wrench, then I tried something that looks like a crowbar and it is used to remove wheel nuts and could not. Finally, I had one person keeping the rear brake lever pressed, the other person using the pulley blocking tool and I have extended regular wrench with 1.5 m pipe (!) shown in the pictures, and only then I have managed to loosen it. Even WD40 did not help before that. The mechanic must have used the impact wrench in the past and with 1.5 m lever you can normally loosen nuts on Caterpillar machines or railway wagons!
I have cleaned everything, put everything back together and went for 300 m test ride. Everything goes smoothly,
but the belt makes "flapping" sound, especially when the scoot is idling that was not present before. I did not make a mistake assembling everything back and the belt has the same length and width, so I do not understand what might be the problem. This fact and crappy replacement Chinese rollers make me less happy about the work I did. Anyway, I think that People's OEM belt may last well into 16-17.000 kms under normal conditions as my OEM looked great when replaced today after 15.000 kms.