ride.race.live Posted April 7, 2021 Report Share Posted April 7, 2021 (edited) So went and installed used VF he had on another motor with brand new reeds and re jetted to a 27.5 pilot as the previous 30 pilot was way rich. Came to start the bike to fine tune the air screw and idle and its miss firing on PTO cylinder. Its popping smoking tons spitting fuel. pipe only gets warm to the touch. FMF pipes durablue pro flow intake no lid and lightened flywheel is only mods. Jetting is 270M middle clip and went from 30 to 27.5 pilots. TORS removed Bike ran great before parked for season. tank was emptied and added 1 gal of fresh fuel mixed 32:1 carbs are synced and have been cleaned a couple times now. (air leak jet and all) ive tried playing with air screw and idle to see if the miss fire would go away no luck Swapped around plug boots and problem stays on the same cylinder both have new plugs even tried another new plug no change Ohmed stator and was within spec. Pick up gap is on spec Swapped cdi's no change 120 psi each cyl slides are in right and choke tube is on (bike wont run without it let alone start) I got a carb rebuild kit on the way and i'll adjust float height once thats in but i doubt that would be the cause Leak down test was done previously before motor ran last year and I 1211 the intake gaskets so there's no way he's getting an air leak in the intake track. Ground is intact everything is plugged in (aside from TORS brain) and it doesnt have a rear brake light. Wire harness is brand new from last year as well. Next step im guessing would be to swap reed cages sides and see if issue follows the reed cage for what ever reason, re adjust float height and another leak down but aside from that and swapping flywheel and stator am I missing anything? Edited April 7, 2021 by ride.race.live Quote Link to comment Share on other sites More sharing options...
hoppedupandcutdown Posted April 7, 2021 Report Share Posted April 7, 2021 Nest in the pipe? Fuel in the pipe? Quote Link to comment Share on other sites More sharing options...
ride.race.live Posted April 7, 2021 Author Report Share Posted April 7, 2021 took pipe off there was no obstructions that i could see. could jam something in the stinger to see if its clear but no debris or anything when i reved the motor up.. aside from the miss fire causing the pipe to be wet there was no fuel puddle in it. the bike sat without the gas tank on it for most of the winter as well so it didnt "self flood" Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted April 7, 2021 Report Share Posted April 7, 2021 Long shot but try with choke on & see if it starts firing also bowls on correct carb? Quote Link to comment Share on other sites More sharing options...
ride.race.live Posted April 8, 2021 Author Report Share Posted April 8, 2021 tried that it just dies out or bogs down pulling the choke while its running. I'll double check the bowls but highly unlikely as i usually only remove 1 at a time. Quote Link to comment Share on other sites More sharing options...
gusto Posted April 8, 2021 Report Share Posted April 8, 2021 (edited) plugged pilot is my guess edit, just read you changed pilots. Were they new? Sounds so much like a pilot issue to me. Edited April 8, 2021 by gusto Quote Link to comment Share on other sites More sharing options...
ride.race.live Posted April 8, 2021 Author Report Share Posted April 8, 2021 Brand new pilots from RMATV. even double checked them. carbs been gone through 3 times lol. going to be a 4th time once rebuild kit on the way so i can change dump tube and float needle. Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted April 8, 2021 Report Share Posted April 8, 2021 If you think it's flooding. Shut the fuel off and see if it gets better when it gets low Quote Link to comment Share on other sites More sharing options...
ride.race.live Posted April 9, 2021 Author Report Share Posted April 9, 2021 16 hours ago, 375hp banshees said: If you think it's flooding. Shut the fuel off and see if it gets better when it gets low haha tried that actually no luck! Quote Link to comment Share on other sites More sharing options...
Keno Posted April 10, 2021 Report Share Posted April 10, 2021 Its not the flywheel, stator, coil or plug wires as you stated that swapping the plug caps did nothing. I would check the new reeds that you installed. Make sure the petals are not chipped, broken, or installed wrong. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted April 10, 2021 Report Share Posted April 10, 2021 Get it started and hit that carb with a shot of ether. If it picks up as it should with ether, you have carb/intake issues. Quote Link to comment Share on other sites More sharing options...
ride.race.live Posted April 12, 2021 Author Report Share Posted April 12, 2021 Thanks! i just got the carb rebuild kit in so ill be doing that set up. im hoping its just a fubar float needle that isnt sealing 100% (enough to seal when not running but when motor running floods out the motor) long reach but hoping its that simple lol Otherwise ill prob take out reeds inspect and swap them sides to see if issue follows reeds. I also got a buddy that can loan me spare carbs so i can rule out the carb. i triple checked the reeds when i put them together as the reeds where out of a blown motor and were a little messy with shavings I had to clean them a good few times to get them spotless. Quote Link to comment Share on other sites More sharing options...
ride.race.live Posted April 21, 2021 Author Report Share Posted April 21, 2021 soo little update... i did leak down test again passed. i switched reeds sides rebuilt carbs The issue seemed to have followed the reed to some extent.... now Mag side is miss firing a bit (not as bad as pto side) but it is... so i guess only thing to blame for that is the reeds which i can't wrap my head around considering it has brand new pedals and when i took them out they looked spotless. also another thing to note... PTO side is still smoking like a siv and spitting fuel. but atleast its getting up to temp unlike mag side now. what could be wrong with the reeds? Quote Link to comment Share on other sites More sharing options...
SKEETER Posted April 21, 2021 Report Share Posted April 21, 2021 Only feasible option I can see wrong here is a canadian trying to fix sumpin. Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted April 21, 2021 Report Share Posted April 21, 2021 Rule number one ;especially if your allready scratching your head; do 1 thing at a time. should've rebuild your carbs & ran and then did the reeds. I Assume You don't have the OG reeds. Did you verify your bowls? Inspected pipes better while doing leakdown? Tried other carbs? Single filter correct? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.