06-30-2016, 09:06 AM | #1 |
Join Date: Feb 2016
Location: Maryland
Posts: 213
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Engine shut off while downshifting
Has anyone experienced their engine just cutting off during a downshifting slow down?
I was going about 60mph on the highway yesterday morning. When I got on the off/on ramp to merge onto the interstate I started to downshift to slow my speed with light braking. As I began my right turn onto the the interstate on ramp, I was then in 2nd gear with brakes engaged for the sharp turn and the bike just cut off on me. It started right back up and I kept going, but it cut off. I couldn't believe it. I had mentioned it to my husband and he had told me that had happened to him as he was downshifting and slowing going downhill somewhere. Any idea why guys? |
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06-30-2016, 10:07 AM | #2 | |
Join Date: Oct 2015
Location: Texas
Posts: 146
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Quote:
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06-30-2016, 11:11 AM | #3 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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I've had this happen once and only once. It happened just after an extremely long, very steep downhill and a very long decel with a stop sign at the bottom. I did my last downshift rolling up to the stop sign with the clutch in and it died.
Never done it since.
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06-30-2016, 11:26 AM | #4 |
Join Date: Feb 2016
Location: George West, Texas
Posts: 4,097
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Wonder if it starved for fuel at the petcock? Makes sense on the downhill? I am usually working the throttle while downshifting to aid in shifting on my bashan
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06-30-2016, 11:35 AM | #5 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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No petcock. Injection. I just figured the ECM got confused from all the unburnt gas on the super long decel. I go down that hill now, I blip the throttle once in a while. Cured it.
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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06-30-2016, 11:41 AM | #6 |
Join Date: Feb 2016
Location: George West, Texas
Posts: 4,097
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Ok....rather, the point where the fuel empties from the tank. (Sloshing fuel starvation etc). Is the tank baffled? Either way, getting in the habit of elevating the rpm s will prevent it.
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***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
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06-30-2016, 12:33 PM | #8 |
Join Date: Feb 2016
Location: George West, Texas
Posts: 4,097
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Good point. I do think mad has done her 1st adjustment.
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***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
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06-30-2016, 02:51 PM | #9 |
Join Date: Dec 2015
Posts: 200
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I'd x3 the valves. How's it start?
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06-30-2016, 08:23 PM | #10 |
Join Date: Sep 2014
Location: Arvada, CO
Posts: 1,004
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Have you worked on the bike recently? I wonder if you have a loose connection or crimped fuel line (unlikely but possible)
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07-01-2016, 05:56 AM | #11 |
Join Date: Jan 2012
Location: ChCh , NZ
Posts: 2,266
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Prob injection setting..
Not uncommon on injected bike motors.. Some yamaha's were quite bad at just cutting out while slowing down... on my XT its the TPS & CO settings... ..
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07-01-2016, 08:28 AM | #12 |
Join Date: Feb 2016
Location: Maryland
Posts: 213
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I was riding up hill, so it wasn't down hill and there was only 100 miles on the bike at the time. So there was plenty of fuel in there.
I have 1000 miles on the bike, so we did our 500 mile valve adj already. However, my husband experienced the cut off before the valve change. I've been the only one riding the bike since the valve change and it just happened to me. So, I do not believe that to be the issue. However, to answer your question CSaddict, the bike has never started right up pushing on the start button. It takes a holding it down for a few seconds and doing it twice to get it started. It has never started quickly, never, not even right out of the box. It's time for another oil change, so I will take the seat off and look around for loose wires and such. It only happened that one time, just really weird. |
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07-01-2016, 09:03 AM | #13 |
Join Date: Jul 2009
Posts: 216
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Madsocial,
I've not experienced what you describe. ABout 7,000 miles so far and I ride a very steep canyon road everytime I'm on the bike. Two questions: Are you able to reproduce the symptom? When you wrote "engine just cutting off", do you mean as in if the electrics suddenly cut off, or as in if the motor starved for fuel? Cheers, Dan K.
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07-01-2016, 09:30 AM | #14 |
Join Date: Feb 2016
Location: Maryland
Posts: 213
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Dan, I will try to reproduce it on my next ride. The power just shut off. Electronics it must be. The motor did not starve for fuel. I know what a motor feels like when it is starving for fuel. You feel jerking, and a putt putt type of feel to it. None of this happened. The bike just shut off! It must be an electric thing.
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07-01-2016, 10:04 AM | #15 | |
Join Date: Mar 2016
Location: Tuscaloosa Al.
Posts: 433
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Quote:
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