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31-10-19, 09:18 AM | #1 |
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Curvy power problems
(Before I start, I guess I know what I need to do - check the stator and reg/rec, monitor the voltage, etc. Still ...)
I've noticed that my curvy is taking increasingly longer to start. The starter motor is turning the engine over slower, and seems to get stuck on compression more frequently. My guess is that the difference has been the cold weather. I've been riding with my (new) hotgrips on and at higher temperatures. I tried riding in today with the headlight off (most of the ride) and the hotgrips off (for the second half) and tried starting the engine again at work. It sounded quicker to me. So, my best guess is that the battery is slowly draining, rather than being topped up in the current conditions. I don't have any power in the garage and can't use any sort of solar power (it's a council garage with another garage on top and a five minute walk from my house). Now, I realise that I should check everything, but before I do that I was wondering if the load is simply too high. First question - does anyone know the power output of the stock curvy stator and the efficiency of the stock reg/rec? I've seen 275W mentioned, but I don't know which model that was for. Second question - has anyone found a non-mains battery maintainer? I could just charge a car battery plug them together, but I really don't want to be lugging a large battery to the garage once a week. Thanks! |
31-10-19, 09:35 AM | #2 |
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Re: Curvy power problems
This might help:
https://r.tapatalk.com/shareLink/top...ink_source=app Sent from my SM-G950F using Tapatalk
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Formerly known as Gajjii Previous Bikes: Red Sk1 Curvy, Red MT-07. Current Bike: Black MT-09. |
31-10-19, 10:09 AM | #3 | |
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Re: Curvy power problems
Quote:
It's been working like that for a couple of years for him As an Emergency backup I have one of these, https://www.amazon.co.uk/s?k=car+bat...price-asc-rank
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31-10-19, 10:59 AM | #4 |
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Re: Curvy power problems
The curvy (SV650Y 2000 model) alternator is rated at 300W at 5000 rpm. Oxford heated grips consume about 60W. Is your commute low speed/short distance? Could you put the bike on a battery tender at work? How old is the battery? Is it an AGM or Li?
You need to check the charging system.
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31-10-19, 11:28 AM | #5 | |
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Re: Curvy power problems
Quote:
I got one of these when I had battery problems, the very act of purchasing it (and possibly charging the battery properly) fixed the issues I had. I've never used it in the 2 years since purchase... Sent from my SM-G950F using Tapatalk
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Formerly known as Gajjii Previous Bikes: Red Sk1 Curvy, Red MT-07. Current Bike: Black MT-09. Last edited by Grant66; 31-10-19 at 11:31 AM. |
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31-10-19, 11:30 AM | #6 | ||||
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Re: Curvy power problems
Thanks for the replies.
Quote:
Quote:
300W sounds like there's plenty of headroom, but I have no idea how much power the ignition takes, reg/rec efficiency, or losses in the wiring, etc. Quote:
Quote:
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31-10-19, 01:38 PM | #7 |
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Re: Curvy power problems
Your commute should be fine for keeping the battery charged if everything else is OK. Id first make sure it is properly serviced,especially plugs,HT leads,carbs, choke plungers and cables then check all relevant connections. Battery terminals and earth straps(including the one to the rear of the engine)benefit from cleaning up and the plastic junction boxes like a spray of contact cleaner as does the strap to the starter motor. Find a way to charge the battery once in a while, I used to do mine about once a month or so whether it appeared to need it or not as this keeps the battery like new. Get a cheapo multimeter and run a basic check on the charging system.
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31-10-19, 09:57 PM | #8 |
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Re: Curvy power problems
Sounds like your battery is a bit elderly rather than any charging problems. In the cold weather you'll notice it more, as it has less oomf and the engine is harder to turn over due to thicker oil.
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31-10-19, 10:14 PM | #9 | |
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Re: Curvy power problems
Quote:
The question is, do I have a fault, or am I just expecting too much from the electrics? |
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01-11-19, 08:24 AM | #10 | |
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Re: Curvy power problems
Quote:
As BikerBiggles said your commute is long enough to keep a battery charged whilst running lights, ignition and heated grips if the battery and charging system are healthy. Measure the battery voltage before starting, measure it again as you press the starter to see what it drops to, record the voltage at idle with and without the heated grips, measure it again at 2-3k rpm. You'll then have a better idea if everything is functioning correctly.
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