Back in 2004 or so everybody with a ported 61x , BPipe, enhancer was running around 80 low (Maybe 75) and 135/140 highs. Myself and a buddy sent our cylinders to TLR for port work. Todd normally set up customers with a single carb conversion using a reverse bored sbn 44 with the lower side bored to 48mm. We chose to stick with our 38's. He gave me a target around 105 to 110 lows with 140 highs (give or take). Also some hints on Needle and Seat sizes. We did not have a popoff guage so it was alot of trial and error. We went all around the world trying to get jetting correct. Changed Jets, springs, back to the OEM 1.5...... One day we found the right combo. Ended up with just about his original jetting. And just had to get popoff and NS corrected (dont ask what it was now!!!!!!) A year or so later I was having some major tuning issues. We were at a ride. Will call this guy "John", he said "you need to be running 75/135 (Close to that) for your ski to run right" So, I swapped low speeds out and low and behold, My ski ran like a raped ape............... for about 1 minute. Then it stuck a piston........... Why? it was too lean........... You see. The porting specs for the TLR was such that it liked alot of fuel down low (Dont ask me why, cannot explain). But we had 2 SJ's with same porting, 1 with a BPipe and the other with a dry pipe. Dry pipe ran a larger main jet. Both had the same Low Speed Jetting and Popoff........ Point being, What works for one port job/ Motor Setup may not work for another......... That little experiment cost me a top end. But I took someones advise who I thought knew what he was doing and made the change. That was on me. I knew what my motor setup needed. Turned out I had a cracked carb that was loosing fuel pressure or something. Save thing to do, is start way rich and tune in. anything above 2 turns out you need to change jetting, above 2 turns you are not changing anything. Ideally, ending up around 3/4 to 1 turn out is good, this gives you room to tune for weather changes. if your are really good and get it really dialed you can end up with screws almost closed! But Lets not do that!
