I am still not finished with my review on the xt225 stock Chinese cam but so far it isn't looking good in my opinion. I topped out at 65 mph with the stock cam, it would probably creep up more in a draft or down a hill. Roughly took about 20 seconds to get to about 60 (slow). With the Xt225 Chinese cam it seemed to pull slightly harder topped out at 60 and took about 18 seconds. I upped the jet from stock 114 (1993 TW) to a 116. The pilot to a 38. The bike now seems to pull a little harder up to about 50 but now tops out at around 58. No real acceleration gains worth mentioning. I will tinker a little more, open the air box slightly, pilot adjust etc. to see if anything improves.