Hi I have a 2007 Suzuki 650/S40 with just over 3500 miles on it. Now that it has broken in and seated I am ready for some performance mods. I began by drilling two 3/8" holes along side the factory opening of the muffler, using a 12" long drill that went through all the internal baffles. This has made a good improvement with the sound the bike gives off. Secondly I have ordered a performance foam air filter. Now, I am looking into which jet set should I go with that best fits the changes I have done to bike. I have found one kit that comes with a 150#, 152.5# and 155# main jets plus a 55# pilot jet on ebay. Factory equipped the bike has a 145# main jet, so I'm thinking a 150# or 152.5# main jet would work well. Any advise on the selection of jets would be greatly appreciated. Thanks in advance