Slow turnover when starting

[mosrrt]

Have 2010R1200RT with 45,000 miles on it . Purchased used last August. All service items were done a few hundred miles ago
It start up quickly and runs fine.
But it seems to turn over very slow
Battery checks out fine .
So is this normal or is there another problem ?
Thanks, Mike

 

[tomcatt]

...it seems to turn over very slow
Battery checks out fine ...

What's your idea of "Battery checks out fine"?
Run a resting voltage check (ignition off) across the battery terminals. You want to see 12.8V or more. 12.7ish volts is iffy.
Charge the battery. Let it sit 6+ hours after charging and repeat the voltage test.

 

[mosrrt]

This has been done ……battery is fine

 

[omega man]

It would be nice to see the amp draw on the starter. I value my Blue Point set for this-

Blue Point Inductive Ammeter Set MT-1009 Snap-On Alternator Starter MT 109 MT110 • $49.95

BLUE POINT INDUCTIVE Ammeter Set MT-1009 Snap-On Alternator Starter MT 109 MT110 - $49.95. FOR SALE! There are two gauges, one for testing starter current, and one for testing alternator current. Used Blue-Point Inductive Ammeter Set From Snap-On Tools.There are two gauges, one for testing...

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Alternatively, you can parallel another 12 volt battery to the bikes battery, even if it’s off you car, and see if the extra amperage depth changes the starter time.

OM

 

[mosrrt]

It’s not the start time …..it starts quickly but turns over slow …..

 

[omega man]

It’s not the start time …..it starts quickly but turns over slow …..

Yeah…… what I posted can check the starter and the speed it turns the bike over.

OM

 

[mosrrt]

I will try it later …….i am thinking it’s the starter needs rebuilding and or a good cleaning

 

[omega man]

I will try it later …….i am thinking it’s the starter needs rebuilding and or a good cleaning

That is what my advice can help show you.

OM

 

[69ZEFF65]

Testing the battery voltage only tells you that the static voltage is good, it doesn't tell you what your battery provides under load. Its pretty simple to attach your volt meter to the battery and and push the start button, observe the voltage drop from the battery as the bike turns over. You can also get an actual batter load tester and do a regular load test. It would certainly be a quicker, cleaner and less time consuming than removing the starter and rebuilding it. If the battery is more than two (2) years old I would go that first before anything else.

 

[mosrrt]

What should the voltage of the battery be under load ?

 

[omega man]

What should the voltage of the battery be under load ?

If the battery dips below around 9.2volts while trying to start the engine, the computer will wonder what you are trying to do.
I have found cranking resistance- voltage drop, amperage draw can be different…. Radically different between a new engine and an older engine- of the same model.
OM

 

[rhbike]

Testing the battery voltage only tells you that the static voltage is good, it doesn't tell you what your battery provides under load. Its pretty simple to attach your volt meter to the battery and and push the start button, observe the voltage drop from the battery as the bike turns over. You can also get an actual batter load tester and do a regular load test. It would certainly be a quicker, cleaner and less time consuming than removing the starter and rebuilding it. If the battery is more than two (2) years old I would go that first before anything else.

There are a number of battery monitors that can show you what is going on. They are pretty darn cheap. I added an Antigravity monitor when I switched over to one of their batteries. It logs voltage by time and detects and provides much more detailed voltage by time during cranking. All this info is downloaded via BT to a cell phone app.