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2005 Recon
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Posted by: dave76

I just put a Big gun exhaust and a filter on my wifes recon, should it be jetted? And if so what number jet do you recommend, We ride at sealevel. Thanks

Posted by: m.h.s.c.#527

try a 105 main and take your lid off

Posted by: mx825

if you leave the lid on , run a 105. if you take it off, run a 108 or 110.

Posted by: m.h.s.c.#527

no cuz that isnt a full system

Posted by: mx825

i'd still leave it on and run a 105.

Posted by: m.h.s.c.#527

he needs more flow with that filter and he wont get the air with the lid on

Posted by: dave76

Alright which jets does this take, I know it's a Keihin, but is it the hex or the slotted jet???

Posted by: ALEXANDERJASON

I DID THE SAME THING TO MY WIFE'S. I AM AT SEA LEVEL AS WELL. I WENT TO A 102 MAIN, AND BACKED OUT THE FUEL SCREW ANOTHER FULL TURN, AND IT WAS PERFECT!!

THE JETS ARE HEX IF I REMEMBER CORRECTLY.

NOT A BIG FAN OF REMOVING THE LID ON ANY OF MY QUADS OR BIKES. I HAVE USED THOSE UNI AIR VENTS IN THE LID OF MY 250EX, AND THEY WORKED OUT PRETTY GOOD.

Posted by: dave76

I ordered a one size up slow jet #42, will this help it idle better when warming up? Or should I just leave the 38 in???

Posted by: ALEXANDERJASON

MOST JET KITS DO NOT COME WITH PILOT JETS FOR A COUPLE OF REASONS. I THINK UNLESS YOU HAVE A HEAVILY MODIFIED ENGINE, THE MOST YOU WOULD EVER NEED TO DO IS TWEAK THE FUEL SCREW. YOU CAN TRY A LARGER PILOT, BUT I THINK IT WILL RUN TOO RICH AT IDLE, AND ULTIMATELY WASTE ALOT OF SPARK PLUGS.

IT IS EASY ENOUGH TO REPLACE ON THIS QUAD, SO TRIAL AND ERROR IS NOT SO BAD.

ORDER THE FUEL SCREW TOOL DIRECT FROM DYNOJET.

Posted by: tedwilley

He's right. First adjust the fuel mixture screw., If you can't back it out any farther and it is still too lean, the you go up one size. Just the opposite, go down one size. Idle is where most plugs foul...
Exhaust and intake mods work better at the engine speed and air flow increase. At idle they are not far off from stock.

ALEXANDERJASON, hey, I'm starting to get used to the ALL CAPS thing! lol

Posted by: dave76

Alright guys I put a 102 jet in with the airbox cover on. Now the quad runs like sh** and keeps poping on deceration. Plus it looks like you need a special tool for the carb adjustment screw and I right??? If thats the case then I was not able to adjust anything today. Like I said I got the the Big Gun slip on and K&N fliter.

Posted by: hillclimbingrec

Dave, when i had my biggun on my recon, i didnt need to re-jet, may be diffrent with u. but try the stock jet and see how it runs

Posted by: dave76

Well I tried backing out the fuel screw and ended up backing it almost all the way out and still could not get the quad to idle right, so I changed the pilot to #42 and set the screw to two and a half turns out and the quad ran beautiful. I still need to go to the 105 main as the plug is still a little white.