Hi V22,
Judging by your handle, it looks like you drive a V22
Okay na diyan sa Motorix, kaya lang, the way they charge labor is the same as in the casas. Meaning, 'isang hawak, isang singil'. But of course cheaper pa rin yung labor compared to casas and there are parts all around. Haggling prowess is an advantage of course hehe.
Sa Eldorado cubao naman, there's like a squad of mercenary mechanics who offer very cheap labor. Very good for minor repair like changing stripped wheel bolts. Parts are generally cheaper than motorix, not by much, but if youre gonna get a lot of stuff, it may well be worth the look.
On replacement belts, hmmm.... i'd pass on these since the originals now only cost slightly more (vs costing twice) than replacements. Unless you can verify the OEM manufacturer and get the specific belt for the Paj.
Enjoy your ride dude!
BTW, replace both belts.