Leads all look good and negative to motor is new cable ,will measure voltage while cranking tomorrow and try bypassing relay paul ,would like to be able to load test starter motor or try another unit
What's the CCA rating on your new battery?
No not yet, was convinced it was starter motor but unless under load it’s misbehaving it all wizzes round perfectly
just fitted new yuasa 30 ah battery
The cca rating is 186
Could be just that andre but will try car battery and jump leads straight to starter tomorrow and hopefully that’ll give me an indication of where the problem lies
That's a low cca and probably insufficient depending on tune of your engine.
After you've confirmed that the engine turns over normally by hand. Measuring the battery voltage while cranking is a useful thing to do. If you get severe voltage drop (say less than about 9V), that indicates that the starter motor is pulling a heap of amps. In that case you might have a knackered starter. Failing insulation in the windings. It's basically just short-circuiting without producing much torque. If the starter motor gets very hot after a couple of attempts at starting, that's also an indication that it's not well. That's exactly the way my starter went when it failed.
Did you put it on charge before use? 186CCA is about what a triple's starter motor will pull, especially with a cold engine in a UK winter. Out of the box a new wet lead acid battery will typically be no more than 80% charged.
Well, wet cell batteries anyway. AGMs are pretty good
If the meat and the beer is free ..........AGMs are pretty good
