Reving throttle kills cold engine

[marked23]

On my older bmw, I got into the habit of applying some throttle while I hit the starter button. That doesn't work with my 2012 FJR. I've learned that now.

I just press the start button and it starts, hands off.

But then, one second after cold-starting, I open the throttle a bit, and the engine dies. I have to wait a bit, maybe 10 seconds, before I can rev it enough to ride away.

Is this normal for a bike with 300 miles? Maybe it goes away after break-in? Maybe it's normal ECU startup?

 

[ekms377]

On my older bmw, I got into the habit of applying some throttle while I hit the starter button. That doesn't work with my 2012 FJR. I've learned that now.

I just press the start button and it starts, hands off.

But then, one second after cold-starting, I open the throttle a bit, and the engine dies. I have to wait a bit, maybe 10 seconds, before I can rev it enough to ride away.

Is this normal for a bike with 300 miles? Maybe it goes away after break-in? Maybe it's normal ECU startup?

Sounds normal. What does it do after letting it idle say for a minute or two after start??

 

[wmadoty]

Make sure the idle is set around 1100. Any lower and you will have all kinds of funky idle problems. Including a lack of performance on take off, stalling at lights, and the problem you just mentioned. I bet your idle is under 1000 rpm when warm.

 

[marked23]

>What does it do after letting it idle say for a minute or two after start??

It revs and rides normally after about 10-30 seconds. A minute or two of riding, and it's all warmed up.

> I bet your idle is under 1000 rpm when warm.

Can I trust the accuracy of the tach? I will check this next time it's warm.

 

[RaYzerman19]

Let it warm up for a minute or two. It runs on the lean side, and works better when things warm up.

 

[A41Billy]

>What does it do after letting it idle say for a minute or two after start??

It revs and rides normally after about 10-30 seconds. A minute or two of riding, and it's all warmed up.

> I bet your idle is under 1000 rpm when warm.

Can I trust the accuracy of the tach? I will check this next time it's warm.

Yes the tach is accurate. My 06 behaves the same way. You should let it warm up to at least 2 bars on the temp gauge before taking off.

 

[GeorgiaRoller]

Make sure the idle is set around 1100.

+1

But then, one second after cold-starting, I open the throttle a bit, and the engine dies. I have to wait a bit, maybe 10 seconds, before I can rev it enough to ride away.

Is this normal for a bike with 300 miles? Maybe it goes away after break-in? Maybe it's normal ECU startup?

Idle Adjustment Knob

I let mine warm up for 30secs before I wrap the throttle on a cold start. Wrapping the throttle immediately on a fuel injected bike cold start really accomplishes nothing anyways.

 

[Steel_Gin]

I gave mine a little throttle once a few seconds after start up and it quit as well. Haven't done that since and it has never quit at start up again. I know Yamaha wants you to let it idle until the idle drop down to 1100 - 1000 RPM, (one bar on the temp) which I do.

 

[NMRoadRunner]

It's injected and the ECU needs to run the numbers before it works properly, I just press the button and let it run till I gat 1 bar showing. Besides, revving the engine before the oil is warmed up and pumping properly will lead to un needed wear on the cams and such. Why do you want to rev it up 1 second after starting it anyway?

 

[azitlies]

Have to agree with others and ask... why are u revving it up right off the bat?

I don't think any motorcycle ever made is going to revv properly just after you start it. They all need to warm up.

 

[marked23]

>Why do you want to rev it up 1 second after starting it anyway?

>Have to agree with others and ask... why are u revving it up right off the bat?

from original post:

"On my older bmw, I got into the habit of applying some throttle while I hit the starter button."

So I noticed that this technique that I needed for my BMW, kills the engine on my FJR. I'm just asking if this is normal.. and from reading the replies, it is. Now I know.

No, I'm not vroom-vrooming the engine right after startup.

 

[SkooterG]

Well, I am going to disagree with the masses. It should be able to run normally as soon as it's started. And as far as waiting for the bike to warm up to one or two bars before riding it? Well, I think that is just silly. That being said, until it has warmed up, I take it easy.

 

[azitlies]

>Why do you want to rev it up 1 second after starting it anyway?

>Have to agree with others and ask... why are u revving it up right off the bat?

from original post:

"On my older bmw, I got into the habit of applying some throttle while I hit the starter button."

So I noticed that this technique that I needed for my BMW, kills the engine on my FJR. I'm just asking if this is normal.. and from reading the replies, it is. Now I know.

No, I'm not vroom-vrooming the engine right after startup.

Jeeeesususus Marked23! that's a BMW!!!! That's Not a Motorcycle!!! It Probably Had A Dry Clutch Too!! My Gawd!!!

kidding, we keeeeed sometimes

glad u got it sorted, that's all that matters

 

[radiummadman]

I'm not a genius, but ever since I can remember (not must past 2 weeks ago) I have always started my bike & let it idle while I put my gear on,

when I am ready to go so is the bike. Then I am sort of a low tech kinda guy.

 

[marked23]

Jeeeesususus Marked23! that's a BMW!!!! That's Not a Motorcycle!!!

I will probably never buy another.

...started my bike & let it idle...

Even though my BMW is fuel injected, it has a manual throttle advance lever, on a separate cable. This is meant to be used to keep the bike running after a cold start. Even with that thing turned on, the engine would always die idling after a cold start.

Rather than sit there holding the throttle open to keep it running while it warmed, I'd just put it in gear and go.

 

[fjrbird]

Mine 06 does the same thing. My fuel injected Kawasaki Vulcan 900 has fast idle when start-up (idle lower when warm up). I can then just ride it immediately with no problem, or rev it a bit without killing the engine. Now I get into the habit of letting my fjr idle for a short while (a min or so).