![]() If you've got an opened up intake & free flowing pipes, I can guarantee you that your bike goes way lean at WFO throttle with only a 115 main. Depends on the changes you've made to your bike's intake and exhaust. These carbs are way sensitive to the air screw adjustment, so turning those in a bit may help both the off idle launch and cold starting. ![]() Starting.mine likes the choke with some throttle at temps under 50 and just some thottle when over 50F. ![]() No whacking it wide from low rpms w/o an accelerator pump. Like Mike said, the shortcomings of the simple-ass slide carb is rearing its ugly head. Leave the pilots for now & see how that works for you. Was the 'razorfly' handle already taken on RAT? Start with a 0.020' shim under the needle.those carbs were too rich with the needle clip set on the 3rd slot, so they got leaned down to the 2nd slot (dyno'ed fine). You are now a proud owner of a KEIHIN CR-SPECIAL Carburetor Se. Main and Air Jets accessible without removing carburetors. ![]() Keihin carburetion jetting - Duncan Racing. Any thoughts? Cheers- Jim, I think you need to reinstall the airbox to take full advantage of the iris effect. It is also hard to start, but once warm, it fires intantaneously. Even 3200 RPM when I nail it, my bike burbles and bogs, but when I nail the throttle 5K the bike takes off like an RPG. Mike- My bike bogs WOT off idle and right now I have 55 pilots, 125 mains and 230 slow air jets.
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