What are you for sea level? What jetting did you find worked the best. I've gotten rid of the bog by running a really fat pilot compared to the main. It runs great the plugs just sooty would love to know what your running for jetting.
I'm also curious what jet's you went with. I'm currently running a Tillotson 212r with a .265 cam, 26lb valve springs, port work, flat top piston, billet rod, etc. So far My jetting so there isn't any bog off idle the 24mm nibbis seem to like a ton of pilot jet. Makes the plug sooty but theres zero bog. I'm running a 50 pilot and a 130 main air fuel screw out one and a quarter.
Yea same here. I ordered a 28mm first. I could not get the bog out of it at all. I swapped it with a 24mm. It's doing better but still bogs if I go full throttle from idle. If I ease into it it'll do fine tho. Unfortunately my jet kit just so happens to be missing the 130 main lol so I'm stuck with the 125. Definitely curious to know what he went with on his.
@@gregkirby Me too. Currently running a 50 pilot and 130 main like I mentioned somewhere. Plugs sooty as heck but there is ZERO bog off idle and no flat spot ant all pulling to 9k. Just feel Like I could get a little more power out of it not running it so fat. Might just be the characteristic of the carb too since 212cc is a lot for only 24mm carb it just want's tons of pilot jet. Amazon has a jet kit just make sure you order the one that isn't just keihin or you have the wrong mains, nibbis take VM style main jets and keihin pilots. I have a real keihin I originally had on my engine but the idle screw houseing broke. Comparing the two they are basically the same besides the diameter of the needle, floats, bowl, and emulsion tube and main jet. Other than that the nibbi 24mm carb is a pe24. Can't beat the price and it does perform pretty good. Go huge on your pilot jet and that bog will go away completely.
@@ephenj I think the problem is the size of the carb. If you look at the mikuni clones the intake side is only 36mm compared to this one being 46mm. Also the motor side being 24mm instead of 22mm. To much air which is why we're having to over compensate with fuel. The stock 40 pilot was definitely too lean and was backfiring when I let off. The 50 is working but I can back the air mixture screw to far out which means it's running rich now for sure.. I'm gonna try a 48 and see how that goes. There is a very good instructional video on RU-vid sponsored by Nibbi on how to tune these carbs. But I personally believe a 22mm nibbi would be the answer. Perhaps if you have one that's really built, then I could see this one working smoothly.
@@gregkirby It's started out as a tillotson 212r then I put jt207 196r head .010 head gasket, 26lb springs, 265 camshaft 232 duration, 108 lob seperation, billet rod, flat top piston, 10.5 compression ratio, ported head and port matched intake, 27in 25ex 5mm stems, then a honda 10k flywheel with extra cooling fins. Then the 24mm nibbi. It absolutely screams with the 24mm the plugs just sooty. Runs and idles great just runs fat lol.
Im looking for a new engine for my mini bike since mine blew up. I want my mini bike to be in the upper 40s-50 mph what would be a good engine to buy and what carburetor should i run with it?
Tillotson 212... 24 milli nibbi slider... Just got it and from a pullout it feels soft, put up higher seems to pull OK. What do you think I need to adjust. I tinkered with needle today. Was in middle and I moved to second spot down (2nd spot away from blunt end) and seemed worse. So I went to the 4th spot and seemed better. It still has a bog from the pull out tho. I'm new and looking for pointers.
