January 3, 201511 yr I pulled my carb apart today. This is on my new to me 09 280 Eco with the PHBL26. The pilot was a 33, and the main was a 270. Needle was a D36 clip on second groove from bottom, slide is a 60. I was expecting the main to be in the 115 range. The 270 seems way out of spec. Is this correct? I have a hard time imagining someone putting in a jet that far off. The bike was definitely running rich. I never really opened the throttle much and have just been putting around though. Anyway, I'm at 4500' elevation. what do you guys think? Throw in a 115?
January 3, 201511 yr Author Ok thanks, just wanted a sanity check. Unbelievable! Do you have a recommended needle clip position to go with your recommended jet setup?
January 3, 201511 yr Author Ok, dumb mistake. Apparently there are two jets that go around the needle. I was looking at the wrong one. The one in the bowl plug is 118. I'm going to try just dropping the needle for now.
January 4, 201511 yr Author Im going to order a few to try. It seems to me that the just above idle is running rich to me though. Plug shows rich also and i spend all my time below 1/4 throttle. Are you above sea level a ways with your jetting?
January 4, 201511 yr Do what he said, run the needle somewhere in the middle, try second groove down first. Run the fuel trim screw as lean as possible for smooth running, but a caution as they do become sensitive to 1/8 turn or so and change with altitude and temps on the day. The transition(to needle) circuit of this carb at 1/8 throttle or so is a weak point so do not expect perfection.
January 4, 201511 yr Author Wouldn't it be a bigger jet for lower elevation? Never heard of going smaller at sea level
January 4, 201511 yr Smaller for the main, bigger for pilot. Actually has to do with atmospheric pressure. Take a trip to Colorado or New Mexico and ask what people run. Or if you ever make it to a National Look up Dale M. the Gas Gas Importer and he will give the same info.
January 4, 201511 yr Wouldn't it be a bigger jet for lower elevation? Never heard of going smaller at sea level Smaller for the main, bigger for pilot. Actually has to do with atmospheric pressure. Take a trip to Colorado or New Mexico and ask what people run. Or if you ever make it to a National Look up Dale M. the Gas Gas Importer and he will give the same info. You can take this advice to the bank! He knows what he speaks.
January 4, 201511 yr Author Ok, I sent off an order request to lewisport for a 38 and 115. Thanks a bunch
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