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hello people of the internet. im strongly thinking about changing my k302 carbs out for either my old pair of original k37 carbs or the pz28 I have laying around. Since the K302 is running WAY to rich, and I have tried rejeting, rebuilding, new spark plugs, hotter spark plugs, timing, ignition you name it, but they just won't run "normal" and always foul up the spark plugs. So those got to go, but I wanted to know, if you guys recommend either the pz28 or the k37 pairs of carbs, when it comes to the size (24mm vs 28mm), since I have read that many people have stated, that 26mm should work best for these old SV engines, and I have read that many have been using the pz28 carbs. I haven't been able to find any information about the k37 carbs, when it comes to needle hight or jet size and all that. But also about, with size carb will work best for my old Dnepr, when comparing these 2 against each other. And if I go with the K37 carbs, should I use the original needle jet with the holes in the top of it, the one that the needles slides up and down in, or the pz28 needle jet, since the k37 is around 5mm longer (from the treads and up) compared to the pz28´s needle jets. The last thing, the k37´s jets say 150, but they look similarly sized to the pz28´s .92 jets, how big is this jet actually? since I can't find any information about, how big these old actually are, compared to keihin or Mikuni jets. the carbs: PZ28D (28mm) (PL10 stamped on the front?) main jet: .92 (properly need a 95 or 98 jet to work correctly) idle jet: ? (a screw with a taper in the end) ---------------------------------------------- K-37 (24mm) main jet: 150 idle jet: 04
My Dnepr m16 has run fine for years with Kaptex vdc 03 carbs. Recently, the throttle cable made a bigger hole in right carb the where it is attached to the slide and I had to change the slide out. The repair kit had a plastic slide and attachment assembly that I installed. I set the needle on the slide so it was all the way down to make it as lean as possible. I started it up and balanced and adjusted the carbs and drove it about 2 miles for a test. I pulled the plug on the right cylinder and it was completer fouled with black soot. The left cylinder is not fouled out. 1. The enrichment valve was all the way closed 2. valve lash checked 3. Air filter is clean 4, Main jet 183 5. main jet needle set all the way down for full lean 6. Double checked timing and point gap 7. Double checked float setting and float valve I changed out the carb with a Petkar K68y. Still fouled right plug quickly. 1. Main jet needle set to full lean 2, Double checked enrichment valve and it seats completely so I can blow no air thru the jet whit carb disassembled. 3. 7. Double checked float setting and float valve, no overflow Any suggestions?