Stumble between idle and mid throttle
Senior Member
1st Gear Member
Joined: Sep 2014
Posts: 210
From: Vancouver Island
2007 KLX250S (std bore)
4700 miles on odometer (bike's condition reflects the mileage)
~4000 ft above sea level
==================
KDX200 snorkel
K&N air filter
Dynojet 2152 kit with 128 main
All smog crap removed and capped
OEM header
FMF Q4 slip on with 1 1/8" quiet core
Bike idles smoothly and once hard on the gas it pulls as well as can be expected from a 250cc bike. Somewhere between open and idle is a catch.. the bike stumbles a bit almost like a two stroke.
Note that if I accellerate from idle to full throttle, the bike pulls clean. The stumble/catch happens when the throttle is chopped and I reapply throttle. On the ride home yesterday, the stumble after chopping throttle caused the bike to die. It started back up with little fuss.
What could be happening?
4700 miles on odometer (bike's condition reflects the mileage)
~4000 ft above sea level
==================
KDX200 snorkel
K&N air filter
Dynojet 2152 kit with 128 main
All smog crap removed and capped
OEM header
FMF Q4 slip on with 1 1/8" quiet core
Bike idles smoothly and once hard on the gas it pulls as well as can be expected from a 250cc bike. Somewhere between open and idle is a catch.. the bike stumbles a bit almost like a two stroke.
Note that if I accellerate from idle to full throttle, the bike pulls clean. The stumble/catch happens when the throttle is chopped and I reapply throttle. On the ride home yesterday, the stumble after chopping throttle caused the bike to die. It started back up with little fuss.
What could be happening?
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