Sounds like it's poppin' popcorn

[jag706]

What's up felllas, I need some help. After I installed some minor mods:

- K&N Air filter

- No snorkel on airbox

- DG exhaust

- Dynojet jet kit (27.5 pilots, 270 main and 4th clip on jet kit needles)

my 'Shee was running great. I only ran her 3 times after mods for about a half hour each, and then on the 4th time it happened. She was screamin along fine and then she just lost power and it started to sound as if started the popcorn maker underneath me . I take it this is what detonating sounds like. I took out the plugs, which looked right in color, crisp brown, and I reinstalled new ones anyway. She still doesn't wanna run clear. She just keeps popping and doesn't wanna rev. Also when she is cold she starts up beautifully but runs right only for 3 seconds and then she does her little sissy fit. When I try to turn it on again I kick the shit out of it , and after numerous kicks and cursing she starts up again but same old shit I live 1000' above sea level and run 32:1. My compression test is kinda wacky but #'s don't sound that bad- 115 lbs. right cylinder 125 lbs. left cylinder. What do you guy's think ? PlEaSeeeeeE Help ME

SORRY FOR THE ESSAY/REPORT

[01bansheefox]

That "i think" happened to me when i put on my new fmf sst, went for a bit but it was all the jets. I had to do 290mains i think.

[jag706]

The kit did recommend that I start with a 280 main jet and put the needle jet on the 3rd clip. Well I decided since the Dyno Jet needle looked longer that am gonna put it on the fourth. A friend of mine says that's where I went wrong , that the needles are tapered and compensated for. Like I said it was running great but then it was like do you want salt & butter with your popcorn The maintenance guide says it can either be bad gas (low octane) or the timining, or carbon build up. If any other of you guys experienced similar problems please enlighten me on THE SOLUTION

The snow is on the ground and I want to go play

[Banchetta]

Its not detonation if you didn't see any silver on the plugs or little aluminum sparklies.... I'd bump up your jetting to at least a 300 main. Its winter and you should be running larger mains for the colder air...try that and let us know.

[jag706]

Alright guys, you're both saying I gotta go up on the main jet so that's what am gonna do. It seems like the easiest elimination or solution to my prob. Am glad to hear that you guys aren't saying it's blown Well I just got home from work and time to catch some I'll jump on it first thing tomorrow mornin, till then if you guys think of anything else I'll check and see in the morning before I take a hatchet...I mean, a wrench to it

[Banchetta]

check the choke tube between the carbs, make sure it was still on correctly. Also try disconnecting the black box above the left exhaust. There is a 3 wire plug. Then disconnect the parking brake switch on the handlebars, follow the wire down to a connection and disconnect it...

[jag706]

Well here's the run down. First thing the black box, I don't have one. My whole parking brake along with the hole wiring system has been eliminated. That rules that out. I swapped out the 270 mains for 280's and went down a clip on the needle. The shee started up but I suddenly realized a problem that I forgot to take care of. The damn right carb float keeps sticking and dumping fuel all over . After taking a few hits at it, bam - unstuck. This went on for a while but anyways this time the 'Shee would idle better and rev up fine up to about a quarter throttle. Any input from here to wide open throttle would cause a big bog and then she would scream and start to back fire along with spitting flames . I didn't actually get to ride it because of lack of time but this what she kept doing. I tried to see if she would clean out by revving but she did not want to rev clean. At least this time the popping isn't right off the throttle, she now revs almost fine in the beginning but then she just goes to shit. In my opinion we made progress but were not quite there yet.Maybe now she's gettin to much fuel ???? Maybe I should try using stock needles ??? Maybe sticking float ??? Just keep 'um comin' guys, we'll get it

[Klotzban1]

If your running stock intakes, you might check to see if there are any hairline cracks. My intakes had a hairline weather cracking about a year ago and it ran fine till it warmed up and BLEH. After getting new intakes I installed them along with new plugs, then checked my slides in my carbs to make sure they were in sync. I ran my mixer screws in till they lightly seated and started with 1 1/2 turns out on each carb and adjusted little by little on each till I got smooth idle. Plugs turned out to be dark brown. I run 260 mains in 26mm carbs w/ open airbox at 1042 above sea level.

[ledofthezep]

'Shee would idle better and rev up fine up to about a quarter throttle. Any input from here to wide open throttle would cause a big bog and then she would scream and start to back fire along with spitting flames    . I didn't actually get to ride it because of lack of time but this what she kept doing. I tried to see if she would clean out by revving but she did not want to rev clean. At least this time the popping isn't right off the throttle, she now revs almost fine in the beginning but then she just goes to shit.

 

I'd put money on it that it's your stator. Have you checked it? Your clymers has specs on checking it, but you're going to need an OHM meter.

 

I've had to the T those exact problems...was pulling my frigg'n hair out trying to figure it out; when it happened to me I figured it wasn't the stator since I'd already put a new OEM stator in about 3-5hrs before shee went to shit. Well after hours of checking things & swapping out parts from my other banshee at the time, I said screw it & bought a RS stator on an adjustable plate & have had not 1 problem since. Just MHO...

 

$125 well spent...

http://www.rickystator.com/pages/Yamaha_Ba...ming_plate.html

[Banchetta]

Its cold out!!!! Go to 300 mains and clean the carbs thoroughly w/ compressed air. The adjust your floats, 21-23mm. VERY important...I'm not impressed w/ aftermarket needles, try the stocker in the 4th clip from the blunt end.

[jag706]

I didn't get a chance to work on her today and my friggin' job is changing my hours for tomorrow. Which leaves saturday, New Years Day If am not to bombed to pick up a wrench I am definetely gonna check the stator, and in a weird way pray that is the problem, so that I can fix her and ride her like the bitch she is!!!! - am talkin about the 'Shee fellas if the stator checks out okay its back to fooling around with the carbs again.Oh and I will check the intakes for any leaks. Regardless I have to adjust the right float and Banchetta I think your right about the needles, am goin back to stock with the new setting. Oh I can't wait to get my hands on her I will definetely let you guys no the results so don't give up on me yet!!!!

OH YEAH I ALMOST FORGOT. YOU GUYS HAVE A SAFE AND HAPPY NEW YEAR !!!!

and don't get to shit faced

[Wassup350]

Sounds like the same problem i had a while back. Might wanna make sure your carbs slides are in sync. And make sure the needles are setting right and that might do the trick.

[jag706]

Well am back guys with the updates I promised. It took so long for the simple fact that my 'shee is at my boy's house which is 20 miles away so I just can't go out and work on her every time I get the inclination. Time go's so fast . But enough with the sob story here we go - Well Ledofthezep I was hoping you found my problem but the test revealed otherwise. I tested the stator coils along with the pick up coil and they both fell within the specs. I did attempt to take my 'shee for a test ride and although like I said before she does idle better and she pulled off alright up until about midrange. She was having trouble reaching the powerband, she kept braking up and backfiring. I feel her struggling around the block so I pulled in the clutch -from 2nd gear for this is all she would pull - and rev her a couple of time which she almost does cleanly. By this time I noticed that I am slowing down like crazy as if I had applied brakes Soon as I let the clutch back out she just slowly dies into a stop. She starts right back up but has to be revved and slipped unmercifuly to get her back to the garage. I look at my back brakes and they are smoking!! I try to wack the caliper with a hammer to unseize the piston but instead a small flame shoots off I'll deal with that later! Now I decide to retake a compression test while she is warm -unlike last time- and the compression is now almost even and reading 125lbs. Very good news. Now I know for sure she is not blown Now I took out the plugs just to see them and they look brownish black . Maybe to much fuel??? I know it would have been a better reading if I rode WOT in 6th. Anyways there you go. Thanks for sticking with me guys I really appreciate all the advice from all that was given

THE SAGA CONTINUES

[FIRST BANSHEE]

Its cold out!!!! Go to 300 mains and clean the carbs thoroughly w/ compressed air. The adjust your floats, 21-23mm. VERY important...I'm not impressed w/ aftermarket needles, try the stocker in the 4th clip from the blunt end.

299966[/snapback]

This man doesn't give bad advise

listen, learn

[bansheefreak]

if you rev it up while stting still will it choke and puke???? if socheck the wires that go to your coil/plug wires... it maybe lose or have a short... best to do it while it running and revving the motor... i'm not talking bout the plugwires that will sting.. i'm talking bout the three wires going to the coil that holds the plug wires...if this is your problem while messing with the wires it will run better while revving .. this happened to my bro banshee and this is how we found the problem...