How can you tell if you have a stock manifold or the HRC manifold part number (16211-MBN-640)? I recently bought a slightly used XR650R and the original owner said the complete uncorking job has been done. The bike has a small lag at 1/8-1/4 throttle so I want to make sure all jetting is correct and the HRC manifold is installed. Just to verify jetting. I live at about 300' with temps typically between 70 and 100. With a cut out exhaust and assuming I have the correct manifold the main should be 172, 2nd to 4th clip position and the pilot should be a 68s? Thanks for the info.