500 battery spec. & CCA requirement

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Joined: 10 Feb 2020 22:31
Location: Zurich, Switzerland

500 battery spec. & CCA requirement

Post by Kamel »

I have recently converted my Camel MkII to electric start. I installed a NOCO NLP5 250A Lithium Iron battery, but it keeps tripping out. I have contacted NOCO, and they think the starter may be drawing too much current for that size of battery. Can someone advise on the original spec. of the battery please? all I can find is that they were 18AH, but that leaves a lot of choices. Also if somebody knows whet the current draw is of a 500 starter that would be very helpful.


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Re: 500 battery spec. & CCA requirement

Post by LeMansMk2 »

After having the starter solenoid welding its contacts on my 350K2, I thought I would investigate the current draw. The starter solenoid fitted was a Lucas item with no part number on it. I fitted a 200A rated item, took out the sparkplugs, and using a DC clamp ammeter got the following results. Peak current was around 134A on initial press of the starter button, settling down to 108A steady current draw. Obviously the calibration of the ammeter will affect these figures. The current draw 'loaded' ie. spark plugs in would be greater than these figures. I guess a 500 engine would have a greater current draw. I use a Odyssey PC680 battery (CCA SAE 170A) in the 350K2 (spins the engine effortlessly) which could be overkill as a PC545 (CCA SAE 150A) would probably suffice. The PC545 was the standard fitment in the Moto Guzzi 1100 Sport Injection I used to have. I got a service life of eight years out of the Odyssey PC545. Hope this is of some use.

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Re: 500 battery spec. & CCA requirement

Post by 3potjohn »

I had a PC680 in my e-start 350 when I bought the bike in 2007.I did not determine how old it was. I would use one again, however I bought a Xtreme600 because it was cheaper. I had a starter relay weld on in the paddock at Cadwell years ago and had to kick the relay to stop the electric motor.
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