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400ex rough mid-range, won't idle.
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Posted: 10/29/09
07:35 PM
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I just got a 2000 400EX. Ran great on first tank. No significant change in weather. Now it won't idle and is rough in mid-range power (pretty much on or off)! I let it warm up before scaring momma. Almost seems to miss a little if trying to run in this range, kind of like hitting the rev limit prematurely. Does fine while accelerating through this range. Have some mechanical background in cars and airplanes, but not these (or carbs). The Dial-A-Jet does not have the Alcohol tank, and currently running E85 per previous owner. Any info or recommendations where to start is appreciated. No fuel leaks observed, does have the choke removed and floods/fouls plug easily on inital cold start.
Sorry for the caps, I cut and paste off the guys ad. Engine Mods are:
NEW HOT RODS CRANK AND BEARINGS
NEW WIESCO 426cc 11 to 1 PISTON AND RINGS
ALL NEW GASKETS
NEW CLUTCH AND THROTTLE CABLES
INSANE PERFORMANCE ALUMINUM AIR BOX
K&N FILTER
SPARKS TIMING ADVANCE
WHITE BROTHERS REV BOX
RACING HEADER WITH BIG GUN PIPE AND SILENCER
DIAL-A-JET ALKY JETTING CIRCUT
WEB CAB AND HARDEND ROCKERS
TIMING CHAIN TENSIONER MOD
1/2'' CNC MACHINED INTAKE SPACER
PORTED AND POLISHED HEAD
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crazybob
New User
| Posts: 2
| Joined: 01/10
Posted: 01/20/10
10:50 PM
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Are you running E85 in this thing???? WTF, put premium fuel in it!!!
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Posted: 01/27/10
11:02 AM
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i would try like 100 octane if it has what you say (upgrades) it will have to be tuned every tank of gas
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