Jetting my Banshee

[1sick6]

Hey every 1 my name is Paul, Im from South Australia and ATV's are all pritty new to me, ive owned my Banshee for a few months and have done a few mods to it but im unsure what jetting i should be running in the carbys, when i bought the bike the previous owner had a local yamah shop tune it but they had 1 of the primary scres out 1 turn and the other out 2 and it cut out when it went on 2 wheels?? i dont trust them at all..... the engine mods are.

• No air box lid
  
• 2 stage uni filters
  
• v force reeds
  
• Vortex X10 cdi ignition controler
  
• stock engine internals
  
• Bills pipes
  

I was thinking about rebuilding the engine with forged pistons and shaving a bit off the head to up the compression a little, how much should i get taken off?

 

So if any one on here could give me a good idea or what size primary and secondary jets I should be running that would be great.

 

and if you know any other engine mods just let me know and ill look in to it, know 1 here stocks much for atvs so i have to get it all off ebay or other states.

 

thank you, Paul

[dajogejr]

Good day mate....

 

Paul, welcome to HQ.

What is your elevation...and what temps do you ride at.

 

If you run less than 1000ft sea level...and normal summer temps, say 65 to 90 degrees, based on your mods, I'd leave the stock pilots and needles in there, middle clip on the needle.

 

Start with 280 mains....and do a proper plug chop to dial your mains in.

 

My buddy has bills pipes and no lid on his box, K&N filter and I put 290's in his (because he's a lazy bastard and I wanted it to be a hair rich for him) and it ran great, plugs looked good...just a hair rich.

 

Here's the plug chop...

 

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

[1sick6]

thanx mate ill do that as soon as i got the bike all back together and running again.

 

PS this is a very helpful site :biggrin: