Starting Issue 850 Mkii

[Replicant]

Hello All,

 

so here are the details: 

 

New battery installed 10 Jan. Reading 15.5v.

 

Seems fine for a couple of weeks. Then bike won’t start without a jump.

 

After 15 mile ride still won’t start, making solenoid click repeatedly when trying.

 

Replace right hand switchgear as I find broken wire and bundle of wires hard and inflexible at the break.

 

So today the battery has 13.4v with key off and the solenoid just clicks.

 

I jump it and the Alternator output at idle is 16v and at 4K revs 15.5v

 

After 5 mins of running at idle I switch  the key off and the battery reads 14.4v

 

After a 3 mile ride the battery reads 15v but would only make solenoid click repeatedly when trying restart with an  engine that is still hot.

 

I check again the Alternator output: at idle 16.9v and at 4K revs 16v.

 

I check the resistance between each of the white wires off the alternator and get 6 ohms between each and infinite resistance between each to earth.

 

 

I'm thinking it's the regulator/rectifier but can't understand why at 15v there isn't enough juice to turn it over but it does when I jump it from another vehicle.

 

If anyone has any ideas, much appreciated

 

Regards