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Senior Member
I am haveing my motor done this week and was woundering if my jetting would be pretty close to what it is now with the mods i have listed below. i am having a wiseco 11:1 stock bore piston put in with a stage 2 hot cam right now i have 155 main jet and 40 pilot. do you think maybe i should go to a 42 pilot? I know right now it starts very hard inthe winter.
2005 450r
AC bumper, pro taper atv mid bend bars pro armor nerfs G froce axle HMF slip on
Wifes 2002 400ex
11:1 wiseco old stage 2 hot cam, works triple rates with rezzies in front.
Senior Member
Do you get more power with same bore with a wiseco piston
2002 400ex
Lonestar Parking brake block off
K&N Airfilter w/outer wear
K&N Oil Filter
Renthal Bars,Renthal Grips
PRM .125 A-ARM and Full Chasis Skids
PRM .190 Swing arm Skid
ITP Holeshot 6 PLY XCR'S
Woody Graphics
Throttle Jockey seat cover
Big Gun CDI
NGK plug
HMF Full Exhaust
DynoJet Jet Kit
RPM twin row carrier
White Brothers Schock Wears
Ride Red or Dont Ride!
Senior Member
It should give you more power, as long as it is a higher compression than stock, which is 9.2 to 1.Originally posted by 397ccEX
Do you get more power with same bore with a wiseco piston
2007 yfz450 -- black Maier fenders, Oury grips, CFM aluminum air box without the lid, 250r K & N air filter, Curtis Sparks X-6 full exhaust, cam mod, IMS-Roll Intimidator MX bumper, AC Racing Blackline Pro-peg nerf bars, Hiper beadlocks, Kenda Claw XCR tires
2001 400ex -- black Maier fenders, JE 10.5 to 1 std bore piston, Hotcam old Stage 2, FCR 39mm carb, port and polished head, valve job, White Brothers Pro Meg full exhaust, K & N air filter, no air box lid, Big Gun rev box, race cut front fenders, OMF air scoops, PRM swing arm skid plate, Tag X5 handlebars, Oury grips, 15/38 gearing, Kenda Claw XCR tires, Barnett Dirt Digger clutch, yfz450 front shocks
Registered User
with the air box lid on in the winter, i run around a keihin 160 or so. i would run a 42 or 45 pilot jet. if it is hard to start, try pumping the gas a few times before you hit the start button.
2005 450r
*sold* 2001 400ex
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