To Anyone With Aftermarket Exhaust...

May 1 2010 Dyno at Little Sahara
Above is a link to copy of dyno run with a 175 main, 48 pilot and clip on #4, it ran very good but had some roughness and was a little rich so I am now running 168 main and 45 pilot with clip on #3 and all roughness is gone and rpm's build much faster than before. Do not have dyno chart for this setup right now.

i just bought a 07 its stock except for a gytr oval slip-on. air box lid on. 500ft above sea level. it is jetted 45p 170m and i belive stock needle. when it get is the high rpm or 4/5 gear it breaks up real bad. do i need to go up on my main or adjust the needle

THEY WILL TURN RED lmao

Well if you all have aftermarket pipes... Why cant I find a stock one for an 04 .lol


928-713-6047

Any one having any problems with this Leo Vince exhaust? I been having problems with it turning blue witch means its rich. But Also gets so hot that it melt the shed guard off and then I warped it with exhaust tap. It is a titanium, the pipe is set right now to stock settings. It some times back fires. I also have have valves sticking problem and brought it in for a valve check and they found all but one valve moving. they relay placed it. I still having problems with the exhaust and back firing. Spit and sputtering, shitty throttle response. Help? anyone!........................

1300 ft elevation

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Ebay.com

1400ft.
Yoshi full exhaust, Tri oval carbon fiber.
Quad works filter, NO lid.
Zip ty Mod. R&D Remote F/S 2 turns
165 main, 45 pilot. Stock needle 3rd clip.

Going to do the cam mod soon, then i'll play with the jetting again

Good thread, This helped me out a lot, can't wait to ride now!

eddie sander racing pro series exhaust pipe, esr cdi box, esr intake, needle jet. best upgrades very loud and very fast

1200ft
HMF slip-on
ESR Intake
12.5:1 CP piston; zip tie mod; cam mod
175 main, 48 pilot, 35 leak, NVCQ 4th clip, f/s 3 turns out

Muzzy slip-on stock air box with uni filter elevation 3000 feet I am currently jetted at 168 main 45p stock clip at 5th clip, no cam mod yet. :red :sonic

'05 YFZ @ 600 Feet

- Trinity Stage IV Full Exhaust
- Cam Mod
- ESR Filter (Aluminum Airbox w/o Lid)
- 178 Main Jet
- 48 Pilot Jet
- NVCQ 4th Clip
- Fuel Screw 2.5 Turns Out

i just bought a 2011 yfz450r im am between a couple exhaust i really like the full barker system and since my quad is efi i do not need to jet it correct? any help would be great

No you don't need to jet it. You don't get a carburator with the fuel injection =D

I live at 800ft above sea level running an alba header and gutted stock can. K&N wit proflow and outerwears with no lid. (2007YFZ) Where should I be I cannot get it right the guy I bought it from had it all messed up because he had no idea what he was doing. Now I have a horrible bog on bottom end but if you ease into the throttle it does fine (with a little poping). HELP! I need leak, main, pilot, and screw settings any suggestions?