Wilsons Sandbox

In a message dated 7/7/00 10:07:17 PM Canada Central Standard Time, DSN_klr650@egroups.com writes: > Check your spark plug after a few tanks of fuel. I had a K&N air filter in the box, the Dyna-Jet kit with 150 main, and the stock exhaust. When I put my Supertrapp on a couple weeks ago, I replaced the plug. It was massively black with carbon. I decided to drop to the 140 main jet with the added Supertrapp. I have only run two tanks of fuel, so I haven't checked the plug yet. But the bike is running better and the mid-range acceleration is great. What I ended up with is: mixture screw at 2.5 turns out, needle set at third notch, 140 DJ main jet, K&N air filter, Supertrapp IDS2 w/10 discs. The bike seems to work great. Will know for sure after next tank of fuel. Mileage, fully loaded with traveling gear, was 42.6 mpg. This was a conglomeration of interstate travel, back roads, head winds, and trail riding. I weigh in at 280lbs. and the bike was fully loaded with GIVI hard luggage. Not too bad. By the way. Dyna Jet informed me that their jet sizes do not directly correlate to Mikuni or Kehin jet sizes. So, your reason for selecting the 150 DJ main jet does not directly relate to the stock 148 main size. You would have to measure the holes to determine the exact difference. If you don't want to spend the bucks on a Dyno Jetting run, or an exhaust analyzer run, then jet by the plug condition. You have made a good start, but you'll be in there a couple times before you finally find happiness. (Maybe not, you might get lucky, most tuners I know usually take several shots before they settle on a combination) Hope my personal experience helps you out. Jim Sherlock