First of all I want to give thanks to all who do such great pictures and write ups while doing their work on the TDUBs. I am not that good but here is my current upgrade and incomplete evaluation. I bought a cheap xt225 cam from a seller on eBay ($60.) new. AHL cam. What I found is that the oil grooves were a little shallower. My big issue was that where the cam bearing went was too big. Stock, 24.83mm Chinese cam 24.96mm. The cam bearing was too tight. I drive engineers nuts. I got out the file, I took it slow and even until I got the 24.83mm. I figured I already used a file on it so why not? I got the triangle file out and deepened the oil groove in both ends of it. All is ready now. Emery clothed it down. Wiped and rinsed with mineral oil, blew dry. I put the cam screw in the end. I put white lithium grease on lobes and bearing surfaces. I filled the cam with half Lucas heavy duty oil stabilizer and Valvoline motorcycle oil. It was so slippery I almost couldn't get hold of it to turn it once it was installed. (I'm talking about just enough to get the pin in the right spot) slippery. Last time I had a hard time getting the timing chain/ sprocket just right. This time I used a marker on the chain link aligning it to the timing mark. That helped so much. I was only one tooth off. Next tip, as others have said keep a rag blocking the area where the timing chain is, anything falling in there means trouble. I put Vaseline on the little cam shaft pin, the vacuum kind of helps hold it in place. I adjusted the exhaust valve a little loose as I have read by others. This cam was so close to the TW that I am going to tighten it up to max spec. Currently the noise drives me nuts. I do not see that sitting still for 2000 rpm is good for the engine due to overheating. I revved it, walked around pushing it for about the first 5 minutes. I then went for a 15 minute ride around the neighborhood keeping the revs up. Engine never locked up so I say the filing was worth it. Performance, it seemed to do a light lean surge while I was going in 2nd gear a little revved holding steady while riding. It didn't top at 65 mph as the stock one earlier. The pull to 60 seemed slightly better. I have 116 main jet to install and 38 pilot, not yet installed. That will be my final evaluation if the cam change is worth it or not. This is the 1993 TW. Any suggestions would be appreciated. I also got the Yamaha Blaster rear shock (red spring) but didn't get it installed yet. I'm not sure if I'll just use the spring only or the whole shock assembly, ebay, $24. I am going to fiddle with compression of both and see which combo I like best. Any advice here would be great as well. Thanks.