jetting think i got it right???? - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums
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Old 09-03-2010, 01:37 AM   #1 (permalink)
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Default jetting think i got it right????

On my 09 YFZ 450 i got a HMF performance series slip on, and i got the FCI intake, and from reading on the forum i think i might have the jetting right. i am at about sea level in San Diego, CA ride at Glamis and tracks in the area. main jet a 175, pilot a 48, fourth clip on the yz needle, two turns out on the fuel screw. does that sound about right? Temp's between the 80's and 90's......... any help much apreciated.....
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-MINE-2009 YFZ450 AC NERF BARS, SHAVED FENDERS, ASV LEVERS, HOUSER STEM/ANTI VIBE, TAG ANTI VIBE BARS, HMF SLIP ON, FCI INTAKE. JETTED
-HERS- 2007 YFZ450 SE AC NERFBARS, HMF FULL, JETTED

Last edited by BIG TAY TAY; 09-03-2010 at 01:39 AM.
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Old 09-03-2010, 01:39 AM   #2 (permalink)
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Ya that's pretty close, I would go smaller on the main maybe around a 168, that's a little rich for just a slip on. A 45 pilot would be better to.
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Old 09-03-2010, 01:44 AM   #3 (permalink)
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I was looking on HMF's website and they recommended a 170 main and a 40 pilot for the slipon. i thought i might need to go a little more rich to take into account the more air i would be getting with the FCI intake.....oh and 2.5 turns out on fuel screw
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-MINE-2009 YFZ450 AC NERF BARS, SHAVED FENDERS, ASV LEVERS, HOUSER STEM/ANTI VIBE, TAG ANTI VIBE BARS, HMF SLIP ON, FCI INTAKE. JETTED
-HERS- 2007 YFZ450 SE AC NERFBARS, HMF FULL, JETTED
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Old 09-03-2010, 11:17 AM   #4 (permalink)
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How does it run? Every bike is a little different.
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Old 09-03-2010, 04:54 PM   #5 (permalink)
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Haven't got all the stuff in. When I do I will post picks & reveiw just tryiong to make sure I pick up the right jets to do it all at once. Will post pics & reveiws
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-MINE-2009 YFZ450 AC NERF BARS, SHAVED FENDERS, ASV LEVERS, HOUSER STEM/ANTI VIBE, TAG ANTI VIBE BARS, HMF SLIP ON, FCI INTAKE. JETTED
-HERS- 2007 YFZ450 SE AC NERFBARS, HMF FULL, JETTED
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