rmcollector Posted December 9, 2020 Report Share Posted December 9, 2020 Hi all, I have a stock 2000 banshee (besides toomey pipes) that came from Utah and is now in Florida. It started first kick when I got it and ran fine for about an hour and then started back firing a bit and was sounding like it was running pretty rich. A week later when I went to start it again it will not start now. Bike has less than 50 hours of run time, never opened, plenty of fuel and has plenty of spark. Sound like it needs a rejet? I'm new to the Banshee, but familiar with 2 strokes and wondering what jets/or anything else I need to replace in the carb? Again, it's from Utah and now in Florida Thanks Quote Link to comment Share on other sites More sharing options...
gusto Posted December 9, 2020 Report Share Posted December 9, 2020 (edited) Well you might have potentially burned it down. If you came from an elevation of ex 4000 ft to sea lever your jetting should have been richened. Running those pipes I would expect a 270-280 main and a 27.5 pilot. what you need to do is a compression test, a leak down test, and find out what jets are in it now. Check compression first Edited December 9, 2020 by gusto Quote Link to comment Share on other sites More sharing options...
rmcollector Posted December 12, 2020 Author Report Share Posted December 12, 2020 Okay, did a compression test last night and im at 128-130 psi on each cylinder, which I believe is about right. Took the carbs out and the mains are at 280 and pilots are stock 25. Going to switch the pilots to 27.5. Not sure why this would effect starting...but going to replace them while their out. Not really sure what else it can be, I have fuel, air, spark. Quote Link to comment Share on other sites More sharing options...
gusto Posted December 12, 2020 Report Share Posted December 12, 2020 Well that’s good news about compression. you should make a leak down tester and see if you have an air leak. South Texas Banshee also sells them. no the pilot won’t make a difference with the starting. You should check out how many turns are on your air screws. are you sure it’s not ported? Is the parking brake and tors deleted? check if you have a plugged gas line or tank filter also. Quote Link to comment Share on other sites More sharing options...
gusto Posted December 12, 2020 Report Share Posted December 12, 2020 https://static1.squarespace.com/static/5be4d5b35ffd2095efa9bdff/t/5bf1a09b6d2a7391b5a84730/1542561947962/KeihinCarbJetting-2015.pdf Quote Link to comment Share on other sites More sharing options...
rmcollector Posted December 13, 2020 Author Report Share Posted December 13, 2020 Yes I have a leak down tester that I made several years back, do you know off hand what size plug is used to seal off the intake? I can go get some at the auto parts store. According to the previous owner (which was the only other owner and an older guy) the engine was left untouched and never opened. Looking at the motor closely, I believe him because the nuts on the head and the cylinder look like they never been messed with along with the side cases. He told me he brought it to the dealer and had them them remove the tors and install the toomey pipes. Everything else is stock. Let's say it has an air leak...it should still be able to fire up? Quote Link to comment Share on other sites More sharing options...
gusto Posted December 13, 2020 Report Share Posted December 13, 2020 I’m not sure I’ve never had an air leak that bad, I can imagine though if your leaking bad at the intake area there is a potential it wouldn’t start. have you cleaned your carbs? After sitting that long it will be full of crap and could have clogged a needle Quote Link to comment Share on other sites More sharing options...
gusto Posted December 13, 2020 Report Share Posted December 13, 2020 Also the tors is deleted and the parking brake is deleted? That can cause trouble. If you have a buddy with a banshee you could try swapping parts like cdi and coil. it does have spark right? Quote Link to comment Share on other sites More sharing options...
rmcollector Posted December 13, 2020 Author Report Share Posted December 13, 2020 Yes carbs were thoroughly cleaned and just waiting now on the 27.5 pilots to come in to put them back together. As far as the parking brake being deleted, I do not know I will have to look into that. But I am having a nice spark so im not sure why the parking brake would interfere with getting it started. Quote Link to comment Share on other sites More sharing options...
gusto Posted December 14, 2020 Report Share Posted December 14, 2020 Parking brake causes it to not run, if it’s deleted and ran good before than don’t worry. did you clean the carbs after it quit running right? Is the hose connecting both carbs on? Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted December 15, 2020 Report Share Posted December 15, 2020 Didn't read it all but p. Brake will allow it to idle but not able to give it much throttle, after that , it'll break up. Tors is off or on ,it will kill all spark...fyi Quote Link to comment Share on other sites More sharing options...
rmcollector Posted December 16, 2020 Author Report Share Posted December 16, 2020 On 12/13/2020 at 8:29 PM, gusto said: Parking brake causes it to not run, if it’s deleted and ran good before than don’t worry. did you clean the carbs after it quit running right? Is the hose connecting both carbs on? Yes I cleaned the carbs and they are currently out of the bike, I am waiting on the pilot jets to come in. When you ask if the "hose connecting both carbs on", are you referring to the 3 way "T" connector for the carbs? If so...yes, they were all connected. Quote Link to comment Share on other sites More sharing options...
gusto Posted December 16, 2020 Report Share Posted December 16, 2020 https://www.amazon.ca/Carburetor-Overflow-Yamaha-Banshee-Stock/dp/B07VF83P51 seenthat hose connecting both carbs? That’s got to be on Quote Link to comment Share on other sites More sharing options...
rmcollector Posted December 16, 2020 Author Report Share Posted December 16, 2020 Yes, it was all connected the same as the picture shows. Going to put the carbs back in sometime this week, I would see no reason as to why this bike wouldn't start... but who the hell knows at this point. Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted December 16, 2020 Report Share Posted December 16, 2020 So you haven't ran it since pulling carb apart? ( havent done anything to fix & try again except verify spark & has compression?) Or did rebuild them & it still wont start , so pulled again?Sent from my SM-A505U using Tapatalk Quote Link to comment Share on other sites More sharing options...
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