Can an 2006 KLX110 with an automatic transmission handle a 140cc big bore kit, and I want to use the stock keihin carb, will I need to change the jetting? It has an 80 main and 38 pilot jet in it now. I also plan to use the original exhaust. I plan to drop down to a 35tooth sprocket in the back for a little more top speed. The rider is about 100lbs max.