runs weird

[twizted269]

ok so she is running rough again. changed all jetting and cant seem to figure it out. she stutters real bad until i get into the high r's. put in a fatter needle and helped alot but still does it. also when i first start it it revs like i pinned the throttle unless i pull the choke. after it runs for a min or 2 it idles normal. elevation is 500ft, jetting is 260 main and 27.5 pilot 1 and half turns out. rest of mods are in my sig. any ideas whats goin on here?

[GrMeyer]

Read up on this site.

 

http://www.dfn.com/benkaren/jetfaq.html

 

Depending on how much your lid is modded. It is hard to say for a starting point.

 

If you did a start up and the bike rev's then I would look for an air leak.

 

Is there a reason on why you went with a bigger needle? Stock seems to work just fine for about 75% of banshee owners. 27.5 seems a little rich on the bottom end with 1-1/2 turns out. You might want to back those off to about 2 turns out. I was able to run 25 pilots with my fattys and pods. I now run 27.5 pilots with a dune port. Depending on the lid. I would start with almost a 280's and work down from there. Put the stock needles back in and put them in the middle one clip up from the middle. 25 pilot with 1-1/2 turns out from seated. I hope you are letting the bike warm up before you rip on it. Having the bike cold will cause it to run different then warmed up. It should cause a bog being cold. Make sure the carbs are cleaned very well and after that make sure you have your carbs synced or you will have a hard time dialing in the idle - 1/4 throttle.

[twizted269]

Read up on this site.

 

http://www.dfn.com/benkaren/jetfaq.html

 

Depending on how much your lid is modded. It is hard to say for a starting point.

 

If you did a start up and the bike rev's then I would look for an air leak.

 

Is there a reason on why you went with a bigger needle? Stock seems to work just fine for about 75% of banshee owners. 27.5 seems a little rich on the bottom end with 1-1/2 turns out. You might want to back those off to about 2 turns out. I was able to run 25 pilots with my fattys and pods. I now run 27.5 pilots with a dune port. Depending on the lid. I would start with almost a 280's and work down from there. Put the stock needles back in and put them in the middle one clip up from the middle. 25 pilot with 1-1/2 turns out from seated. I hope you are letting the bike warm up before you rip on it. Having the bike cold will cause it to run different then warmed up. It should cause a bog being cold. Make sure the carbs are cleaned very well and after that make sure you have your carbs synced or you will have a hard time dialing in the idle - 1/4 throttle.

the lid is cut open on the top with an outewears filter covering the hole. i would say its pretty much the same as no lid or close to. there shouldnt be an air leak though. i did test for it. it all started when i realized the slides were in backwards and the jetting was way too rich to begin with. i had the stock needles in but it ran worse with them. just tried the others to see what happend. carbs cleaned several times, synced, and engine warmed up before lettin loose. tomarrow is planned for more work to figure it out.