I've been becoming more familiar with my CT-90, and wanted to get some advice on the ultimate motor, knowing full well that the best motor for it is the one that is currently in it. I'm looking for a bit more speed, (who isn't), and the ability to have a manual clutch in mine, without a real decrease in fuel economy or reliability. I know that you can always just drop a 140cc Lifan or YX160 stroked out to 180cc, or something crazy, but I have reservations of doing so. I already have a decent starting block in the CT-90 motor currently in the bike, and a swap to anything else would result in the loss of the high-low range box, one of the things that makes the bike special. Too much horsepower would also overpower the braking and suspension rather quickly I'm thinking that building up the current CT-90 motor with a S-90 clutch cover and clutch, along with a SL-90 shift drum for 1-N-2-3-4 shifting would fix my reservations with the auto clutch. The Powroll bore kit and stroker crank, although expensive, would upgrade the current block to a bit under 124cc, and the stuff sounds bulletproof. Alternately, I'm looking at the ATC125 top end and crank and seeing if either of those would work. Stock exhaust would still work, at least with the Powroll stuff, and i'd be interested to see if the stock carb has enough flow to be rejetted for the larger displacement. Disadvantages include cost - the Honda stuff is cheap, but the Powroll stuff isn't, and i'd still be running points. The points are a pain to adjust, but I haven't had a set go bad on me in a while - and unlike a bad CDI, i've always been able to limp home on points after issues. I suppose thats a lot of thought for a cheap scooter - but i'm just trying to see what knowledge is already out there. Looking to do some longer tarmac events next year, possibly the Lake Erie Loop if I can get up that way, along with covering a good bit of the TaT. So, what would you run if you had the choice?