sleeper06 Posted June 17, 2009 Report Posted June 17, 2009 I have a 421 cub at my house for tuning,it has 35mm PWK,190psi,+4 timing,shearer inframes.It had 170 mains,52 pilots when it got here.i rode it a couple of times and rejetted.Im down to a 162 main.50 pilot and the bike feels pretty good My question is what is everyone running with a similar set-up,im at sea level and 70 degrees the cub has a clean up port (stock) Quote
okbeast Posted June 18, 2009 Report Posted June 18, 2009 Same carbs, around 1100 ft. elevation and hot riding temps. I'm at 155 main and 48 pilot right now but I think I need to go up a little on the main I've got a little bog at WOT in the upper gears. Haven't had much time to mess with it though but you sound close. Quote
VegasJeff Posted June 18, 2009 Report Posted June 18, 2009 I have a 421 cub at my house for tuning,it has 35mm PWK,190psi,+4 timing,shearer inframes.It had 170 mains,52 pilots when it got here.i rode it a couple of times and rejetted.Im down to a 162 main.50 pilot and the bike feels pretty good My question is what is everyone running with a similar set-up,im at sea level and 70 degrees the cub has a clean up port (stock) I'm running the same setup as you are sleeper and I run 158 main 50 pilot and a CGJ needle.I know its an odd ball needle,but the CEL would bogg at 3/4 throttle. My elavation is 2100 feet. Quote
RadarRacing Posted June 18, 2009 Report Posted June 18, 2009 I had my 421 on gas with shearer BB inframes and was running 155s then checked it on an a/f meter and went to 148s 48 pilots and CEL needles. Made 11 more HP. Quote
Tony Lopez Posted June 22, 2009 Report Posted June 22, 2009 I had my 421 on gas with shearer BB inframes and was running 155s then checked it on an a/f meter and went to 148s 48 pilots and CEL needles. Made 11 more HP. What gas are you using. I am trying to re jet myine for VP109 50/50 with 91 pump. I still don't have the right setup. I went down from a 168 to a 155 because it was bogging down unless I reved it up high before I shifted. I was getting hestiation for a couple of secs when i shifted to 4th then It would run loose. Any thoughts. Quote
sleeper06 Posted June 27, 2009 Author Report Posted June 27, 2009 Im using vp c-16 ,you need to plug chop it to be sure its good or a/f meter,I chopped the bike at 170,165,162, The 162 main looked the best,a lil rich but safe for someone who is not going to F with it all the time like me Quote
TeamRealtreeHD Posted June 29, 2009 Report Posted June 29, 2009 1300 FT ASL... 70-80 degrees on the day I tuned her up 48 pilots, CEL on 3rd clip, 2 turns out on the air screw Got 160 mains in it, the plug chop says it is good, and the bike pulls hard throughout all 5 gears. Quote
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