new starting issue

katflap · 01-25-2017, 02:05 PM

A slightly different stalling issue in the winter cold.

I have a road junction about 100-200 yards from my house. I set off straight away from starting, reaching about 20mph.
I get to the junction and stop. The bike will idle for 10-15 seconds and then stall.

The "fast idle" when cold , i think is way too short.

Normally to overcome this problem i dont let the revs drop, keeping them at around 2000 rpm until the way is clear and I can pull away.

I made some logs to see what was going on.

Though i didn't spot a cause for this happening I did notice that as the revs die away to nothing,
the battery volage drops quite significantly, much more than when i've monitored a stall when hot.

Also, something that 2LZ mentioned in another thread, is how slow the IACV was to react to the dropping rev count.

see below, at 555rpm the IACV has only moved a few steps from when at 1500rpm.

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01-25-2017, 02:05 PM	#8
katflap Join Date: Jan 2015 Location: England Posts: 382	A slightly different stalling issue in the winter cold. I have a road junction about 100-200 yards from my house. I set off straight away from starting, reaching about 20mph. I get to the junction and stop. The bike will idle for 10-15 seconds and then stall. The "fast idle" when cold , i think is way too short. Normally to overcome this problem i dont let the revs drop, keeping them at around 2000 rpm until the way is clear and I can pull away. I made some logs to see what was going on. Though i didn't spot a cause for this happening I did notice that as the revs die away to nothing, the battery volage drops quite significantly, much more than when i've monitored a stall when hot. Also, something that 2LZ mentioned in another thread, is how slow the IACV was to react to the dropping rev count. see below, at 555rpm the IACV has only moved a few steps from when at 1500rpm.
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