KFX400 WONT START OR STAY RUNNING - Honda TRX Forums: Honda TRX 450R Forum
 
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post #1 of 5 (permalink) Old 06-12-2009, 06:21 PM Thread Starter
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POPS TOOK HIS 2003 KFX400 OUT FOR A BLAST TODAY AND IT JUST STOPPED DEAD IN THE TRAILS. I THOUGHT IT WAS A PLUG BUT WHEN WE CHANGED IT THE OLD ONE LOOKED FINE. THE QUAD STARTED UP AND GOT ABOUT 5 MIN DOWN THE ROAD WHEN IT STOPPED AGAIN BUT THIS TIME WOULD NOT START ANYONE??????????????? COULD IT BE VALVE SHIM CHECK TIME???

06
ROSSIER SYSTEM
LID OFF WITH UNI AND OUTERWEAR
162 main 48 pilot 55 leak 2.5 turns out
PRO ARMOR NERFS HEAL GUARD AND FAT PEG
QUAD TECH SEAT
JE 13.5 PISTON
FOX FLOATS FRONT FOX PODIUM X REAR
FOUR PLAY ARMS 2.5 MGC
FOUR PLAY SOFT BARS
JB SWING ARM
PRECISION STEERING STAB.
LONE STAR AXLE AND NUT
LONE STAR CARRIER DUAL BEARING
KICKER CONVERSION
R&D AIR SCREW
QUAD TECH HOOD
stock front sprocket/rear one tooth bigger
GREEN WIRE MOD
ASV CLUTCH LEVER
ALL LIGHTS AND ELECTRIC FAN GONE
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post #2 of 5 (permalink) Old 06-12-2009, 09:16 PM
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Posts: 165
Check and make sure the battery is fully charged, Sometimes it will have enough power to turn the starter, but not enough to get it to power the CDI to get the spark hot enough.. Happend to a buddy at the dunes a few weeks back.


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post #3 of 5 (permalink) Old 09-25-2009, 10:59 AM
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Posts: 548
either its valve adjustment time or you have a cupped valve(s)

KFX525 (basically a ltz400...and yes it still has reverse!)
64.33hp 41.57tq
+10mm stroker, 96mm ice cube, cp piston
13 paddle extremes, Hsr 48mm carb, big custom webs, ported and welded head, titanium valves, titanium wrist pin. Plus 8 swinger, drag axle, drag stem, carbon fiber bars, A few more things. 275lbs wet. Yep it's still heavy, but it's a duner!

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post #4 of 5 (permalink) Old 10-09-2009, 10:48 PM Thread Starter
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just to let you guys know bad gas lol

06
ROSSIER SYSTEM
LID OFF WITH UNI AND OUTERWEAR
162 main 48 pilot 55 leak 2.5 turns out
PRO ARMOR NERFS HEAL GUARD AND FAT PEG
QUAD TECH SEAT
JE 13.5 PISTON
FOX FLOATS FRONT FOX PODIUM X REAR
FOUR PLAY ARMS 2.5 MGC
FOUR PLAY SOFT BARS
JB SWING ARM
PRECISION STEERING STAB.
LONE STAR AXLE AND NUT
LONE STAR CARRIER DUAL BEARING
KICKER CONVERSION
R&D AIR SCREW
QUAD TECH HOOD
stock front sprocket/rear one tooth bigger
GREEN WIRE MOD
ASV CLUTCH LEVER
ALL LIGHTS AND ELECTRIC FAN GONE
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post #5 of 5 (permalink) Old 10-12-2009, 07:51 PM
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Posts: 259
bad gas ??.................... i had that today , no one wanted to work near me

03 ltz 400 white
ported
95 bore JE piston
RHC#208 in & 187 ex cam
+5 hotrods crank
.100 spacer plate & drz gaskets = .120
MCCT
42mm FCR (Sredrum taper bore)(180mj 48 pj)
EMN needle
R.A.T. Stack
WB adjustable fuel screw
400ex thumber
BARKER PERFOMENCE pipe
RHC Ferrea valves +1 intake
dynatek
06 clutch w/450r plates & 400ex springs
04 trx 450r intake boot
trail teck flywheel
450r front master brake
skat trak extremes 21X11X8 -12 paddle 72 RO
+4 swingarm
rear end lowered
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