best guess at jetting

[400rednEX]

i just bought my first banshee and i've read most of the jetting threads and i think it's jetted lean. it's a 92 with fmf golds, turbine core 2's, fmf ram valves and stock carbs (mikunis- 26 or 28mm stock?), k&n with pro flow, no lid on the airbox. i'm pretty sure the cylinders are stock. it has 260 mains and a 30 pilot in it now, but from the threads i've read it should have 270 to 310 mains, what would be the closest guess. i'm about 1200 ft.

Edited May 4, 2005 by 400rednEX

[01bansheeke]

telling us how it runs woudl be a good place to start bro.

[400rednEX]

it's my first banshee and i'm jumping into someone elses mess so i'm not sure how it should run. right now i'm eliminating some other problems to narrow it down to just the jetting, but before i tore off the carbs to rebuild them and replace the reeds, it cut out totally on the top end and could only sometimes be coaxed in to opening up. it had other problems like carbs out of sync and needle never seating too though.

[white trash]

yea your way lean on the main, hence the cutting out. Go up to a 310-320

 

stock carbs are 26MM

Edited May 3, 2005 by white trash

[400rednEX]

thanks on the carb size, it's hard to tell looking through the threads which carbs are stock.

[NEVER SATISFIED]

320 and work your way down... it will be puzzling if you need a jet that big at 1200ft sea level.. report back .. . . keep the pilot stock for now.. you can adjust that by your air screw

[400rednEX]

i ordered pairs 280-320. how big of a pain is it to change the jets with the carbs installed, or do you have to take the carbs off?

[Wallynut]

You'll have to pull the carbs, just do one at a time to avoid mixing slides and such. Make sure your sync each time you work on them. You'll see little windows on one side, when carbs are about wide open, marks should show at same time.

[400rednEX]

windows? you mean on the side of the carb body? i just dipped and cleaned them today i don't remember seeing them, but i wasn't looking. i was just checking sync by taking off the airbox and looking in at when they lifted. i take it that looking through the windows is the correct way to do it?

Edited May 4, 2005 by 400rednEX

[Rare Scottish Tree Badger]

windows?  you mean on the side of the carb body?  i just dipped and cleaned them today i don't remember seeing them, but i wasn't looking.  i was just checking sync by taking off the airbox and looking in at when they lifted.  i take it that looking through the windows is the correct way to do it?

364179[/snapback]

Yip, they're on the side. But the left carb's window is on the inside which makes it difficult to see. I use a similar method to what you did, but I just take the air filter off and look in through the airbox.

 

Rare.

[sredish]

from the threads i've read it should have 270 to 310 mains, what would be the closest guess.

 

I don't know, you tell me....