I don't know of a replacement head for the CPI but I'm interested to learn about one. Do you have any info?
type in CPI and look for the sprocket. I know the seller WMPC has some, that's the bloke in Zhubei.
I think the 36mm carb is quite common now having seen quite a few of them on the internet. That's what I'd like to get but I think the suspension is more important so I'd do that first. I might even do it myself if I can muster the cash somehow.
My CPI wouldn't start yesterday. It was standing in the sun all afternoon. When I finished work I tried to start it and it did start actually, I blipped the throttle a few times, but it died when I went to set off. Then I couldn't start it again. It was turning over but not firing. I'm no mechanic but my dad did teach me a bit of stuff (but not enough!). There was plenty of fuel in the tank, the fuel stop tap was letting fuel through to the filter. The spark plug looked fine and the wire to it wasn't broken where I could see it. I took the tank off and looked for broken wires etc but couldn't find any. I fiddled around with the CDI and rec/rec wires and connectors. Then it started again, ran for about ten seconds and died after a few blips of the throttle like the first time.
I don't know how to diagnose fuel starvation or a faulty spark plug/lead.
It went into a scooter shop, it's still there now and I haven't heard anything about it.
I think it may the something wrong with the carb, possibly the pilot jet that has a blockage, hence why it would rev up but then died from idle. It has also tried to die when pulling away from lights quite a few times in the past couple of months.
Anyone have any ideas what it might be? Tafcoml, what happened to yours to make you change the carburettor?