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Join Date: Sep 2015
Location: Tucson Arizona
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05 TRX450, 41mm FCR Tuning Help!!!!
Okay I'm a little annoyed that I keep losing so to a Stock YFZ that's piped and jetted and getting shit for it..........My quad is not running how it should!
I bought a 41mm FCR Carburetor from a 07 CRF450R.
It starts up first kick or 2 No issue's Hot & Cold, I have to play with the throttle a little to keep it from Stalling while at idle. It don't seem to have the Bottom End I expected along with the Throttle response how it used to, it revs fine no choking out, but When I try to "Crack The Throttle" it will choke out a tad not to much but obviously it should be able to peg the limiter if I crack it.
My friends YFZ450 when you Crack the Throttle, there is there Rev Limiter
Yes my TP Sensor is connected & Correct.
I rode an 05 TRX450R that has same Set up as mine and it has the Response of a YFZ450... Thus, what made me wanna go to the FCR Carb.
I do know my Intake Valves are practically Shot and have ALLOT OF HOURS need to be Replaced but I don't think that would kill my Throttle Response would it? I know that may be what is killing my Bottom end power I'm certain of that... I get Smoked Hard core by both my buddy's YFZ's from dead stop, but Top Speed I can creep past no problem at 84 MPH
Quad Details below
"Elevation Tucson AZ 2400FT Above Sea Level"
Main Jet - 170
Slide Needle - At Mid Section "Out of 5 Clip Settings runs best in mid clip"
Pilot Jet - 48
Pilot Screw - 2 1/2 to 3 Turns Out "R&D Flex Jet"
Main Air jet - 90
15T Front Sprocket/Stock 38T Rear Sprocket
Big Gun Rev Box
No Air Box Lid
Uni Air Filter
White Brothers Exhaust "No Super Trap Plates Strait Through Exhaust"
Last edited by Ryan94; 03-31-2016 at 07:26 AM.