Issue Shorthand Name: "Fast Starter Syndrome"
Symptoms: (some or all)
- Bike won't start
- Bike has sat for a period of time (perhaps days or weeks)
- Hit the starter and in the first 1/2 a second it just doesn't sound quite right.....and after a couple seconds not a hint the bike firing.
- Starter seems a slightly higher pitch.
- Starter seems to spin a little faster than usual.
Hypothesis/Speculation of Cause:
- This may be caused by marginally leaky fuel injectors allowing fuel from the pressurized fuel rail to slowly dribble into the combustion chambers. This could explain the hard starting unless WOT (flooded) and the faster than normal turn over (fuel washes oil off cylinder walls resulting in compression loss. (FredW)
- Possible piston ring freezing into place or rusting. (Warchild & Ignacio)
- Increased incidence with E-10 blends..possible rusting or gunking of pistons (Ignacio) or valves (
- Winter blend vs. summer blend of fuel? (e.g.)A bike last used in September may not start well in cold January (Ignacio)
- Temperature, humidity, and/or weather?
- Letting bike sit after a short ride or "garage warm-up"? (gumba)
- Possible use of fuel additive like SeaFoam or other stabilizer
- With a full battery and confirmed fuel in the tank press the starter and DO NOT LET GO. Alternate slowly between no throttle and full throttle....or perhaps no throttle to 1/3 throttle.
- Engine will eventually light--probaly cough and sputter. Don't let up on the starter. Recycle the throttle again noting if some position seems a sweet spot.
- If the battery goes dead...recharge and try again. Or consider a high amp charger.
- Ignacio has had it happen 3 times over the life of his '05 with 135,000 miles. The last time he noted that he could smell fuel from the exhaust and had both fuel and spark the first time it happened removing the plugs.
- Ignacio hasn't found a temperature correlation. First and second time were in the 60-80 degree range and third time was in the 40's.
ADMIN NOTE: Subsequent posts may merged into the first thread and removed to keep the thread clean and on point. Constructive criticism and observations encouraged.