Hmmm so whats the issue here do you think?

[roadman]

Good evening all

Bike I am talking about > 2008 Aprilia Shiver 750

Very new to these 2 wheel monsters so this could be a stupid question.

From cold bike splutters and then starts but only with 13.7v-14.0v. Anything less and it just splutters.
When bike is warmed up, the bike can start and stop no problem.

Before I take it somewhere any ideas?

[Krikkit]

I'd check all the connections on the starter first, then maybe a new battery (or rather, borrow one from a car and some jump leads)

[black-k1]

Sounds like a battery that's at the end of its life. A replacement battery should sort it.

[roadman]

New battery was the first thing I changed, as that's what I thought the issue could have been. But the problem still exists.

[Krikkit]

I'd be checking and cleaning up all the connections to the starter, and if you have a set of jump leads you could run them to the relevant connections on it to bypass the supply wiring.

[OutInTheShed]

Does it crank as fast as it should?

If it's cranking slowly, then do the battery volts get dragged down a long way?

It can be useful to measure the cranking current with a DC clamp ammeter. If there is plenty of current flowing but the motor isn't cranking well, that's often a half burned out starter motor.
If the volts are dragged down and the current isn't huge then it could be the battery.
A battery needs to be fully charged. That means overnight at >14V, not just 10 minutes at 14V.

Look for voltage drop in the wiring/contacts/starter relay...
Check the earthing of the starter.

If the engine is spinning over OK but not firing, then it's back to sparks, fuel system, compression.....
New plugs?
Fresh fuel? ( the one time in 20 this makes a difference it's very embarrassing!)
Clean injectors (or is it carb?)?

[Rick448]

On my Blackbird it was a buggered starter solenoid.