Avoiding a "Push" start - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 22 (permalink) Old 07-18-2019, 02:15 PM Thread Starter
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Avoiding a "Push" start

I grew up with carbs, a real choke and the introduction of electronic ignition and ABS. And one other feature I miss today, the kick-start. Thought it would remain a "classic bike essential", but probably for many good reasons is now relegated to history.

Anyway, I continue to learn more after a couple of years of ownership of my 2013 Thruxton, much of it from this forum.

Problem: I have found during the last two years an intermittent failure of the engine to turn when pushing the start button. No apparent reason....just nothing, no click, no struggling to turn, nothing. In the past I have been able to jump start, either on a slope, or with the aid of a bystander pushing until I get the speed up to nudge it into second gear and release the clutch. This happens intermittently with both cold and warm starts, always with the choke leaver "in". I normally find the choke button is not needed in warm weather, and usually the engine will spin just fine at first touch of the button.

Solution: I recently read somewhere on this forum a less strenuous solution that hasn't failed me yet...thought I'd reiterate. If the engine is silent after attempting to start, pull the choke to the first stop (even when warm) and press start again. For some reason the engine will spin and burst into life immediately. (Don't forget to push it all the way in after you are started).

My experience has been 100% success on this. So can anyone tell me what magic is working here? Obviously it's an EFI bike. Is the ECM bypassing or overriding something to provide the juice/power when I pull the choke out? I had assumed the battery was at fault, but if it starts with the choke out I'll assume the battery is fine?

Thoughts anyone? Just curious!
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2013 Thruxton: Hagon 2810, Ricor Intiminators; STS; AI & O2 removed; 2>1 baffle remove; airbox snorkel and restrictor removed; TTP; Tail Tidy; Eastern Beaver Relay; LED Indicators; Tubeless Rim Conversion; Pirelli Angel GTs 110/80-18, 150/70-17

Last edited by Thruxty; 07-18-2019 at 02:21 PM.
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post #2 of 22 (permalink) Old 07-18-2019, 03:49 PM
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Booger in the temp sensor telling you it needs the cold start?
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post #3 of 22 (permalink) Old 07-18-2019, 05:01 PM
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If the ground for the starter relay/headlight cut-out relay is supplied by the ECM it's possible that something like a false low battery signal or some other glitch could keep it from grounding the relay coil. Pulling the choke might override that. You could test with a test light on terminals 86 and 87. One should be hot when start button is pushed and the other should be grounded. I don't have an EFI bike so I don't know which is which. Also that's assuming they use the same relay the carbed bikes use. I'm making a lot of assumptions here and you know what that dose sometime.
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post #4 of 22 (permalink) Old 07-19-2019, 11:06 AM
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Wow, didn't know you could bump start an EFI bike. Thanks for the info! My bike does the no-start thing from time to time. Try raising your idle speed a half-turn of the knob. That's what works for me in this situation.
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post #5 of 22 (permalink) Old 07-19-2019, 01:03 PM
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Same thing happened to me today but I own a 2018 Speedmaster. We were going on a four day 1,200 mile trip but due to the heat wave and the rain on Thursday we are rescheduling our trip. I ride my bike every day to work so I got ready today and pushed her out of my garage, loaded up with all my stuff for the day, sat on the bike, pulled the clutch in and pressed the start button nothing. The lights came on when I turned the key on and it did cycle like normal but press the starter button and nothing. I put the kickstand up; pulled the clutch made sure she was in neutral and pressed the starter button, nothing. This is the first time it has done this and I was glad I was at home so I pushed her back into the garage and put my battery charger on her. When I get home I will see what is going on but I have a feeling it is going to be one of the safety switches or a drained battery. For a six week old bike with 3,000 miles on her not a confidence builder.
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post #6 of 22 (permalink) Old 07-19-2019, 03:21 PM
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I had a similar problem. It turned out to be a relay under the left cover. It was full of water.
Worth a look under the cover I recon.

Here is the full post.

https://www.triumphrat.net/air-coole...-question.html

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post #7 of 22 (permalink) Old 07-19-2019, 07:54 PM
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My 2015 T100 does this too. Push the starter button and nothing. Then it works. I was wondering if it would start with a push if I needed to because the clutch lever is suppose to be pulled in to start.

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post #8 of 22 (permalink) Old 07-20-2019, 04:54 AM
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Quote:
Originally Posted by jackthebiker View Post
My 2015 T100 does this too. Push the starter button and nothing. Then it works. I was wondering if it would start with a push if I needed to because the clutch lever is suppose to be pulled in to start.
The clutch safety switch is a requirement for the starter circuit, therefore not an issue when bump starting.
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post #9 of 22 (permalink) Old 07-20-2019, 10:41 AM
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Quote:
Originally Posted by cvw-bandit View Post
The clutch safety switch is a requirement for the starter circuit, therefore not an issue when bump starting.
Thanks for the info, thats what I was hoping. Last time it wouldn't start I was at a Harley dealer with a few Harley riders watching. After a couple of tries it engaged the starter. I thought maybe a bad starter button. I have had that happen on Yamahas.

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post #10 of 22 (permalink) Old 07-31-2019, 06:04 PM
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I have started pulling the fast idle out to the first notch when the engine is warm, no more starting issues. This appears to be a fix. Idle is set to the manual be the way.
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