Half-Crazy (HC) is a member of the LC Forum and is generally considered one of the best LC carb people around. I have done several of his modifications with good results. Because of his knowledge in this area I asked if he could provide the following information, which he agreed to do. You can contact HC at half_crazy@hotmail.com Do it yourself rejetting of the 1500 LC: There are two ways to go with performance enhancements for the LC. The stage 1 is slightly better for low end torque and the stage 3 has more midrange punch. Stage 1 torque peak is around 3000 RPM and the stage 3 peaks at around 4000 RPM. With either one the bike is a tractor, but the stage 3 runs best above 3000 RPM. With either set-up a good aftermarket exhaust system and a Dyna 3000 ignition module are recommended to make the most of it. The Dyna will improve throttle response and mileage a bit. Whether you use stage 1 or stage 3 your mileage will average about 37MPG. In other words 40+ if you baby it, and 33 if you push it hard. Jet kits are a rip-off. They cost 4 times what the parts are worth, don't include all the parts you need, and contain needles that will destroy your carbs and cost you a fortune. Jets and shims: http://www.chopperhouse.com They usually have the jets as well as many peripheral parts and K&N air filters in stock. Or buy them somewhere else, but make sure you get "Genuine Mikuni Jets" and shims .020" thick. Main jets are part # N102.221 Small Round type (specify size). Pilot jets are part # N224.103 in #37.5 size. Directions to re-jet: carbrejettingprocedure.doc OR REJET ***Sea level or close to it. High altitudes require different settings*** Stage 1: Stock air filter with the little "hood scoop" removed from the top of the filter. #117.5 main jet in the rear carb. #120 main jet in the front carb. One shim under each needle. #37.5 pilot jets. Mixture screws at 2-1/2 turns out. If you are using the K&N filter (part # SU-1598): Substitute #120 rear and #122.5 front main jets. All else remains the same. Stage 3: Purchase the K&N filter, part # SU-1598 and cut the top lid out to the inside of the filter media. This gives a much larger air inlet hole. It's a little work, but gives nice results. With the Stage 3 air filter you will need to change the main jets. Use either a #165 rear and # 167.5 front (baffled/restrictive pipes) or #167.5 rear and #170 front main jets (open/free flowing pipes). All else remains the same as stage 1. Feel free to e-mail mailto:half_crazy@hotmail.com for more info. Send me a message before you start to work and I'll give you a number where you can reach me. If you get stuck or feel like you need help, I can walk you through it over the phone.