Gemeiner Posted February 24, 2017 Report Posted February 24, 2017 (edited) Just got my new 421 serval motor in the frame and im trying to break it in but im having some problems. Its a 421 dune/play ported serval. I have pc pipes for now, 35mm pwks, k&n filters with outerwears, vforce 4 reeds, With 35mm pwks i Started with 155main and 58 pilots with the needle on the 4th clip, im at 4000 feet. I synced the carbs and when i started it, It seemed rich and wouldnt idle. So i went down to 52 pilots which helped the smoking and it idles when its warm but not when cold. Also the right cylinder smokes and pops a little. It has a chariot racing cool head so i know the o rings could be off. Not sure if compression testing would tell me much since i havent broken it in yet. Also when I was syncing the carbs i noticed a little smoke came out of the carb on the right side Sent from my SM-N920V using Tapatalk Edited February 24, 2017 by Gemeiner Quote
Gemeiner Posted February 24, 2017 Author Report Posted February 24, 2017 (edited) New plug fixed that. Mustve started way too rich. Starts first kick but its still rich. Gunna mess with my idle screws Sent from my SM-N920V using Tapatalk Edited February 24, 2017 by Gemeiner Quote
guns4children Posted February 24, 2017 Report Posted February 24, 2017 New plug fixed that. Mustve started way too rich. Starts first kick but its still rich. Gunna mess with my idle screws Sent from my SM-N920V using Tapatalk I'm at 158 with my PC pipes. Maybe I'm running too rich? It's been like that for long time though. Quote
Gemeiner Posted February 24, 2017 Author Report Posted February 24, 2017 (edited) Dont forget im at 4000 feet so i should be smaller than yours. Im only noticing trouble on the bottom end right now. It was sluggish on the bottom with the 58 pilot amd smoking so i thought it was rich so went 2 sizes down to 52 which ended up too lean. Gunna try 55s now. Mid and top pull so hard its awesome. Just gotta dial in the pilot Sent from my SM-N920V using Tapatalk Edited February 24, 2017 by Gemeiner Quote
Gemeiner Posted February 24, 2017 Author Report Posted February 24, 2017 Walkin now lol died on me. Not sure why, it seemed good then bam just stopped. One plug was oily tho. Sent from my SM-N920V using Tapatalk Quote
Phelps Posted February 25, 2017 Report Posted February 25, 2017 still way too rich on pilot. at 4k ft i wouldn't imagine you would need over a 45. also main is a tad big. 155 would be around 1k ft 1 Quote
Gemeiner Posted February 25, 2017 Author Report Posted February 25, 2017 It just died on me yesterday. Ended up pushing it a few miles. No spark for some reason even with new plugs. Sent from my SM-N920V using Tapatalk Quote
Gemeiner Posted February 25, 2017 Author Report Posted February 25, 2017 Wire harness touched the pipe and melted. Easy fix. Just in a bad spot since i removed the airbox. Need to figure out where to put it or if i can insulate it. Sent from my SM-N920V using Tapatalk Quote
rjdgriff Posted February 25, 2017 Report Posted February 25, 2017 Wire harness touched the pipe and melted. Easy fix. Just in a bad spot since i removed the airbox. Need to figure out where to put it or if i can insulate it. Sent from my SM-N920V using Tapatalk kompolsive concepts harness FTW Sent from my iPhone using Tapatalk 2 Quote
bluebanshee98 Posted February 25, 2017 Report Posted February 25, 2017 ^ what he said. And your probably still rich at your elevation 1 Quote
Gemeiner Posted February 25, 2017 Author Report Posted February 25, 2017 So i should go down a few sizes on the main? Sent from my SM-N920V using Tapatalk Quote
Gemeiner Posted February 25, 2017 Author Report Posted February 25, 2017 I started with 58 pilots but it smoked a lot so I went to 52. but bottom end was bad with a 52 pilot and turning the air screws in made it better so I went to 55s. going to 55s made a huge difference, it starts first kick and feels good but I noticed a flat spot in 4th. haven't adjusted the main yet Quote
trickedcarbine Posted February 26, 2017 Report Posted February 26, 2017 Wire harness touched the pipe and melted. Easy fix. Just in a bad spot since i removed the airbox. Need to figure out where to put it or if i can insulate it. Sent from my SM-N920V using Tapatalk Look up some high temp thermal sleeves. Quote
Gemeiner Posted February 26, 2017 Author Report Posted February 26, 2017 (edited) Look up some high temp thermal sleeves.Ill do that. thats exactly what i was wondering about. I think im still lean on my 55 pilot. FAST says i should be at 58. Plus when i was riding earlier it ran pretty decent at 60 degrees but once it cooled off this afternoon like 40 degrees it started running like crap on the bottom. Its pretty much broken in now so ill do a plug chop and see whats going on. Sent from my SM-N920V using Tapatalk Edited February 26, 2017 by Gemeiner Quote
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