the boris Posted August 29, 2019 Report Share Posted August 29, 2019 Just trying to figure out how can I have the same set up on both carburettors 30 pilots and 270 mains with one turn out on idle screw, needle 3 grove, and choke (left) side to be rich but right to be on lean side?Now I just went to 290 mains wich should improve the right cylinder but that will also make left cylinder way to rich.I spent some quality time on the carburetors, cleaning them and making sure nothing is blocked, I also changed choke o ring, which improved the "rich" situation but I'm not quite there yet.The bike is sitting at 135-140 psi, it's got new set of pistons and jugs,has v force 3 reeds, fmf pipes, cool head with 21cc domes and K&N air filter.I took it out for 5 min ride on Sunday, before i went to 290 mains,and the bike seemed to be going well but i didn't want to push it hard as I was not comfortable with main jet set up. Don't know where to look at the moment. Sent from my ONEPLUS A3000 using Tapatalk Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted August 29, 2019 Report Share Posted August 29, 2019 do a leak down and make sure you don't have a leak but...Not uncommon treat each cylinder like an individual motor .you don't have to have the same jets in each carburetor. just monitor ,so if it was something stuck in the carburetor and it becomes unstuck it'll change (but more than likely, become rich, so shouldn't hurt)Two other common problems are choke tube left out, slides in backwards and over oiled filtersSingle air filter? If not swap those LtoR n see if it follows Sent from my XT1585 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
the boris Posted August 29, 2019 Author Report Share Posted August 29, 2019 do a leak down and make sure you don't have a leak but...Not uncommon treat each cylinder like an individual motor .you don't have to have the same jets in each carburetor. just monitor ,so if it was something stuck in the carburetor and it becomes unstuck it'll change (but more than likely, become rich, so shouldn't hurt)Two other common problems are choke tube left out, slides in backwards and over oiled filtersSingle air filter? If not swap those LtoR n see if it follows Sent from my XT1585 using Tapatalk Mate thanks tor the advice, I'm in the process of making leak down tester so should have everything ready tomorrow.This was my first time rebuilding banshee so i wasn't sure what is normal and what not,and since i changed couple of things in the rebuild from original set up (somewhat downgraded) wasn't sure if i had good starting point. Btw its single filter inside the box, no lid tho. Sent from my ONEPLUS A3000 using Tapatalk Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted August 29, 2019 Report Share Posted August 29, 2019 You'll be 1/2 way to your reeds doing a leak down test. Might not hurt to look @ them too?Sent from my XT1585 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
the boris Posted August 29, 2019 Author Report Share Posted August 29, 2019 You'll be 1/2 way to your reeds doing a leak down test. Might not hurt to look @ them too?Sent from my XT1585 using TapatalkI had a quick peak when i took my carbies off and one looks funky, I couldn't have a proper look but might take them off before I do the test. Should it be spot on closed or its ok to have a bit of a gap?Sent from my ONEPLUS A3000 using Tapatalk Quote Link to comment Share on other sites More sharing options...
the boris Posted August 29, 2019 Author Report Share Posted August 29, 2019 Found this, quite interesting:Durability isn’t the only advantage to different reed materials. A stronger, stiffer material allows the reed to be thinner and lighter. The lighter reciprocating mass of a reed increases performance. If the reed is too thin, however, it can start to flutter at high rpm. This means that the reed isn’t keeping up with the frequency of pulses of the engine and is disrupting airflow. Throughout its life span, a reed petal flexes millions of times, and its individual fibers start to lose their springiness. The reed’s modulus of elasticity decreases so that in equal engine conditions the reed will deform and open farther. This is called hang-open and affects performance. It can even make the bike run a little richer off the bottom.Sent from my ONEPLUS A3000 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gusto Posted August 30, 2019 Report Share Posted August 30, 2019 (edited) GF are great reeds that make the most power but require more petal changes. They’re thin. If your seeing light, change them up. so you solved the richness in one cylinder after the o ring change or still rich? carbs wear out and don’t respond to minor changes sometimes. I have a set like that. Edited August 30, 2019 by gusto 1 Quote Link to comment Share on other sites More sharing options...
registered user Posted August 30, 2019 Report Share Posted August 30, 2019 i wouldnt even worry over a small light gap. thats only their stationary position. soon as the engine fires theyll be closing as needed 1 Quote Link to comment Share on other sites More sharing options...
the boris Posted August 31, 2019 Author Report Share Posted August 31, 2019 GF are great reeds that make the most power but require more petal changes. They’re thin. If your seeing light, change them up. so you solved the richness in one cylinder after the o ring change or still rich? carbs wear out and don’t respond to minor changes sometimes. I have a set like that.It's definitely reed, only on the left side tho,the right is in superb condition. I had a decent engine damage on that side before the rebuild, probably damaged the reed too. Sent from my ONEPLUS A3000 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
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