Cold start problem- only bump start when cold

[Vloukole]

Hi guys

My Gs1000 G wont start when I push the start button. It just turns over.
I then have to bump start the bike and when I do, it starts right up. It idles perfect and rides very well. Starts very easily after that when using the button.

I checked the valve clearance and : Ex 1 - 0.05mm
2 - 0.07mm
3 - 0.06mm
4 - 0.12mm

Intake 1 to 4 - 0.02mm.

What do you guys think? Can these figures be the reason for the cold start(first start of the day) issue?

 

[robertbarr]

Borderline ignition wiring is the only thing that makes sense to me. The starter is pulling your available voltage below what your ignition needs to produce a strong enough spark to light things up. A bump-start doesn't influence available voltage, and it starts.

A meter across your coils might show a drop, but I doubt a mid-level meter would be quick enough to provide any useful data. A more advanced meter that can record min/max would be more helpful. The best (& least expensive) approach is empirical; wire in the relay mod. If that works, you've found (and solved) the problem at the same time.

There are other reasons to measure & investigate anemic voltage to (or from) your ignition switch (horn function, signals, headlight intensity, etc).

 

[Vloukole]

Is there a tutorial for the relay mod?
My horn does not work. It sounds like it wants to but only makes a quick soft horn sound and then nothing.

 

[cowboyup3371]

If your intake valve clearances are at 0.02mm than they are way too tight and you'll want to adjust them.

 

[Vloukole]

Okay I will. How do I go about cleaning the harness? Is cleaning all the connections and grounds enough? Will it help to reduce the voltage drop?

 

[Vloukole]

I wired in the relay mod and it fired up instantly!! Works great. Thanks for all the help guys.