Hi all, I'm new here. I recently bought a job lot of Honda Spacy scooters - four in total, along with a big pile of spare parts. One had to be scrapped with a rotten frame, but two others are up and running and being used. The third is missing its exhaust and needs a rebore, which got me thinking... I see that in the US you got a 150cc version and I was wondering how hard it would be to uprate this one? You can buy Chinese 150cc cylinder kits off eBay for about £50, and I've seen 2nd hand CH150 exhausts on US eBay, but what else would I need to change? I imagine it'd need a bigger main jet, but beyond that I'm not sure. These scooters were never big sellers in the UK, and information is hard to come by. I get about 50-52mph top speed from the one I'm riding, does that sound about right? I've seen in a few places that the 150 is good for high 50s sort of speeds so as I've got to replace the top end and buy an exhaust anyway it seems sensible to try this. Here's the one I'm riding round on at the moment and this is the one that I'd like to make into a 150 All suggestions gratefully received!