Got my 2000 Banshee last night, got some questions

[Walleye]

So i went out to check it out, when i got there, it was so clean, and looked so badass! so i took it for a test ride, it seemed strong and nice, but not so quick and responsive as my friends 250r. when i got back to the guys house, it died out on me for no reason. It was like 30 degree out. the guy had no clue what jetting was in there. it just would not run on its own unless the choke was on. Cant even start it up without choke. choke must be on most of the time.

 

So we got permission from him to do compression test. it turns out 90-93 psi on left cylinder, 110ish on the right cylinder. The left smokes more than the right.

 

It has FMF fattys and silencer.

 

The guy's orginal price is 2750, i tried to negoiate with him for 2,000 due to that the top end needs rebuilding soon. the price ended at 2,500. Bought it, took it home. Tried to run it, and still needs choke on. Low end power is poor. everytime i try to start 1st, i need alot of gas to get it to go without killing it. Clutch seems very very late.

 

Me and my friend took the carb apart, and before that we had to take off the plastic rear fender off, and jeezbus that guy put red thread locker on almost all of the allen screws that fasten the fender on. and it was a bitch to remove it.

 

Anyways back to the carbs, we found out that the air screw is set for the left, set at almost 1/4 turns, the right is almost 3/4 turns. Main jets are 250. I'm not sure of the pilot jets, and what the needle jet are set at yet. We tried so hard to remove the needle jet and no success. will try again tonight after i have done some reading on the bansheehq forums.

 

The guy ran it with that setup all summer, never rode in the winter.

 

The choke will not stay in place, have to hold it. 40 bucks for a new one yikes!!!

 

What do you guys suggest me to tune it for now until i am able to get new rebuild stuff, might go with forged pistons and bore it a bit.

 

I am in Rochester, NY, elevation is estimated 1100 to 1300. weather ranges from 20-30 sometimes 40 degrees. its going to get warm sometime later in a week or few.

 

I just ordered 190 to 220 jets. but after reading a little bit, i have seen some people run even high as 300! wow, most average i have seen are 260-280. but thats for cold weather. I guess i might as well go to the dealer and buy some bigger jets than 220 or 250.

 

does anybody run twist throttle setup? are there kits for banshees with tps?

 

Oh also the guy said he is running 32:1 ratio. I am going to shoot for 40:1 or maybe i should stick with 32:1 for now with the old motor?

 

Thanks

[banshee350twin]

might be the choke tube mine died on me like urs did never no. And my jest havent ever bean changed and i live in man over the winter it's can get really cold and the summe really hot and it run's mint.

[J-Madd]

Try the air screws at about 1.5 turns out, As far as jets....I'd think probably 27.5 pilot and at least a 340 main if you take the lid off and you have a K&N. Read the jetting FAQ, it helps a lot. It's definitely time for a rebuild with that compression in the low 90s.

[9603banshee]

I'd put in some 27.5 pilots, 320 mains, and turn the air screw 1 1/2 out on both & then play w/ the idle....should fix it to run and idle fine....will need a top end sometime, but can still be used as is ...also probably wouldn't hurt to put some BRAND NEW spark plugs in (BR8ES NGK's)(good piece of mind on a new bike)(also change tranny fluid).....check the intakes for cracks or leaks, check choke tube, and clean the air filter (could be clogged and don't look like it)....just a couple maintenance ideas for a NEW bike to you!!

[sheefreak]

If you take the top end off real quick, might find your rings are sticking in the landings on the one lower side. You can actually clean those grooves out(mineral spririts, and something to scrape in there) and reassemble w/o honing, as long as you reuse the same rings. But you should replace your head gasket and base gasket. Or maybe just get a set of rings, hone it, and slap it back together. If your rings are sticking on the one side, your piston will eventually start hitting the cylinder wall and causing more problems. I would take a look before I ran it too much more.

[fastbanshee4u]

280-300 mains at tops if its not ported. 27.5 or 30 pilots Most banshees with aftermarket pipes do not like stock 25 pilot jets . The pilot jet holes are so small they can plug up with dirt and fuzz. Your problem is deffently most likely the pilots and is the rubber hose on between the carbs,it ties the two together for the choke circuit.Once you get these jets in then if it dont start good you can look at compression and other areas.Dont be afraid to play with the air screws 1/4 to 2 1/4 turns. when its real cold out you may want to limit how long you hold it wide open. your jetting should be between 260 thru 320.When Im done with a ported shee with every thing on using stock carbs I have had to go as high as 440 mains .

[thegroup]

Trinity single carb (SO MUCH EASIER TO FUCK WITH ) Wisecos, and Noss or Prodesign Cool Head is the way to go

[Walleye]

Ummm. today after i got home, me and my buddy got into working on it, put the carbs back in, but before that we checked the pilot jet, and its stock one, 25.

 

We fire it up with the air needle at 1 1/2 turns out, it fires up, but will not idle, and have to keep on the gas. choke is still on. as i played with the idle knob, it just unexpectly revved up so highly. we had difflicuties tuning it. later we found out that the left plug is fouled. We put 2 new ones, but i didnt check the plugs because it was in the same boxes as the BR9ES are in. so i think it has BR7ES in now. it runs fine, but still will not idle, both cyl are running. Were having such hard time tuning it due to less experience tuning 2 carbs at once.

 

We stopped because it was getting late. Were going to try it out again tomorrow and try to get it to idle, then work on the low end power.

 

if nothing works, i will have to wait until i get bigger jets and pilot jets. after that if nothing works, rebuild is due.

 

btw it has k&n filter too.

[Walleye]

Today i finally got it to idle!!! but it idled so high a few times, had to pull the choke on if it idled really high to bring it down to a lower rpm while i adjusted the idle screw on the TORS. It would sometimes rev up on its own, and then goes back down and slowly idles down to proper rpm but sometimes it would die. but now its a bit better but still high. took it for a spin, and the air screw is 1/2 out, thats the only way to get it to idle. will work on it more tomorrow to try and get the idle as low as possible. kinda feels like it was at 2500 rpm. but it runs great! had fun on few passes on the road. Hopefully this weekend it will be in the 40's like high 40's.

 

will it be ok with the 250 jets and 25 pilot in the 40-50 deg weather? the needle jet we dropped the clip one line lower. still one more line to go.

[Hilarious]

Today i finally got it to idle!!! but it idled so high a few times, had to pull the choke on if it idled really high to bring it down to a lower rpm while i adjusted the idle screw on the TORS. It would sometimes rev up on its own, and then goes back down and slowly idles down to proper rpm but sometimes it would die. but now its a bit better but still high. took it for a spin, and the air screw is 1/2 out, thats the only way to get it to idle. will work on it more tomorrow to try and get the idle as low as possible. kinda feels like it was at 2500 rpm. but it runs great! had fun on few passes on the road. Hopefully this weekend it will be in the 40's like high 40's.

 

will it be ok with the 250 jets and 25 pilot in the 40-50 deg weather? the needle jet we dropped the clip one line lower. still one more line to go.

491802[/snapback]

 

250's sound too small of a main jet for you.

You may need something in the 280 to 300 range.

It also sounds like you need some bigger pilots.

Get some 27.5's and put those in there.

You also may have an air leak somewheres causing it to rev up by itself.

Check the springs in the carbs and make sure they arent in a bind, since you have changed the needle position.

What do your spark plugs look like?

Also make sure ur carbs are in sync by looking at the slides, making sure that

they go up and down at the same time.

Edited March 24, 2006 by Hilarious

[suzuki0702]

Today i finally got it to idle!!! but it idled so high a few times, had to pull the choke on if it idled really high to bring it down to a lower rpm while i adjusted the idle screw on the TORS. It would sometimes rev up on its own, and then goes back down and slowly idles down to proper rpm but sometimes it would die. but now its a bit better but still high. took it for a spin, and the air screw is 1/2 out, thats the only way to get it to idle. will work on it more tomorrow to try and get the idle as low as possible. kinda feels like it was at 2500 rpm. but it runs great! had fun on few passes on the road. Hopefully this weekend it will be in the 40's like high 40's.

 

will it be ok with the 250 jets and 25 pilot in the 40-50 deg weather? the needle jet we dropped the clip one line lower. still one more line to go.

491802[/snapback]

 

that eratic idle is caused by a lean condition...do some plug chops and im sure you will come up lean...start at 300's man..if it runs better choked its defintatley lean...read the jetting faq...no idle check your pilot and the needle...fine tune it with the needle..good luck!

[Walleye]

Me and a friend with 250R went out for 2 hour ride today, so much fun and im loving it already! I did a 6th gear wot run and it was short, but the plugs looked good, a bit brown on the right piston, and it was kinda black on the left one due to bad rings and low compression. did check it again after a hour or so of run, and it was still brown. so its safe for now. temp was about 43 degree out.

 

i was able to keep up with my friends 250r i wonder what it will be like with new top end and perfect compression, and correct jets.