Its interesting how a variation of jets and needles can both work but work for different reasons. (pullover from other circuits apparently)
Here is my experience with an LTR kit...
My jetting which worked pretty good for the last 2200kms or so, was made up from all the extra carb parts that came with the bike, but I ended up buying an even leaner 175 main in its last setup.
What I was running pre LTR:
N1EF needle
#7 slide with clip in middle
42 pilot
175 main (started with 180, then went 178, then 175)
air screw about 2.5 turns
Plug color was much better with a 175 after a hispeed check but pretty dark after slow riding, idle was pretty good. Most of my riding is tight single track, 2nd to 4th gear stuff, wide open stuff is pretty brief.
After first installing the LTR kit:
180 main
LTR needle with clip in middle
45 pilot
air screw about 2 turns
Idle screw backed out a couple more turns
It didn't initally go too well, maybe it was me, maybe it was a stuck float/debris, maybe the idle screw turned out too far or not far enough as it said in the instructions, don't know, but it didn't fire in the first couple kicks with the choke on as it always did, so turned off the choke and kicked lots. It was flooded bad. So bad that after re&re'ing the carb again, with a new plug, it still wouldn't fire and ended up using the crankcase drain bolt and got about 1/2 oz of gas out of it. Plug very wet.
So it came apart again, blew it all out again, but this time I put a the leaner 178 main, moved the clip up 1 notch leaner, and put in the leaner 42 pilot I had. Fired up 2nd kick.
The test ride went pretty well, a little too crisp it seemed, on a top speed run it revved to the moon a bit too easy, and seemed like a little detonation was happening if you chopped the throttle from hi revs. A plug check proved it was too lean, on top anyway. So, the 180 went back in, and the clip moved back to the centre. The 42 pilot was left in for now. The bike starts from cold with a very wimpy 1st kick now. The kickstarter doesn't turn over the engine much, or very fast to begin with so I had always kicked like hell with the lever always whacking the footpeg. Now just a half assed kick works, hot or cold. The old cold start ritual was always choke on, 1 or 2 kicks, turn off the choke right away, then play with the choke lever for a few secs until it would take throttle cleanly, and try not to let it stall out. After a min or so, it would idle fine by itself. Now, its choke on, 1 kick, and it will idle without overrevving with the choke left on for a few secs, then flip the choke off. It idles even better than before but i've only had a couple brief rides so after some long singletrack I'll check if I need the 45 pilot, but its much smoother/controllable power from idle to top. Not to mention that the idle screw in no longer coil bound.
Highly recommended !!
