Don't drill the slide. Thats outdated advise there. If you don't believe me you can call dynojet or whoever makes your jet kit. It may say to drill in the instructions but thats because they never bothered to reprint them for the older kits. My 1500 had a thing with the throttle where it would have no power then all of a sudden take off quick. Turned out the slide was drilled to 1/8 so the slide would lift too quickly. I replaced the slide with a new non-drilled slide and it has a smooth transition now. If you want to help with throttle response and help get rid of flat spot off idle maybe try one of these http://www.cv-performance.com/cvp-slide-spring/
Where did you ever hear that about the slide lifting too quickly? Sounds like something other than the slide if your bike suddenly lurched after throttle. Mine's drilled to 5/32, or slightly larger than 1/8, and it's never run better. No stumbling, no lurching. Having said that, if he's keeping the stock air system and not upgrading to a high-flow air filter, there's probably no advantage to drilling it out as these stock air systems are quite restrictive as they are. On the other hand, I have a Baron's Big Air with a high flow filter mounted right to the carb.
If you get on the throttle quickly, the slide lifts to allow the bike to take a big gulp of air, but if it's slow to respond because of air pressure behind it, there is a second where it is fuel starved, causing the hesitation. A bigger hole allows the slide to displace the air more quickly and allow fuel into the intake a little faster, matching the sudden increase in air volume. That's all it does. It doesn't increase horsepower or anything else, just eliminates the stumble or cough at takeoff without having to set the carb too rich. If your bike suddenly lurched, I'd want to see where your c-clips are on the needle and the size of your pilot jet. Some guys like to increase the overall amount of fuel that gets delivered to the intake to over come this issue. Thus the huge jets, when the problem is a lack of fuel at a specific time in a specific place which is easily fixed without necessarily pouring more gas through the carb.
Whatever works for you, though. Some guys insist on 170 main jets and 56 pilots and I've never seen a need for them unless you like to burn a lot of gas needlessly and like getting 33 mpg.
04 1500 Classic
Sissy bar, luggage rack,
light bar, 2" risers,
Isogrips, Fatbar crashbars,
offset hiway pegs, tank bib,
new brake pedal, throttle lock,
Cobra Lowboy Shotgun pipes,
Baron's Big Air relocated right side,
tombstone tail light,forkbag,
detachable hard leather bags,
alarm, power port, clock,
and a cool cupholder
Last edited by PatC; 12-18-2012 at 10:03 AM.