Something maybe worth mentioning....

Captain Liberious · Two Stroke Sniffer Joined: 23 Feb 2013 Karma :

It just occurred to me to mention this, seeing as I'm doing the forum thing today, as it might help someone at some point...
After my old Honda had been sat up for a few months over winter nothing on earth would get the bloody thing started, and I actually wore out the already tired starter motor doing it.
So while I awaited the arrival of my new starter, I stripped the carbs down and cleaned them as per Larry the carb guys instructions (this guy know a lot about deep cleaning carbs), as the float bowls were full of suspicious looking green slime, and the bike hadn't long been in service after a 7 year retirement.
After fitting the new starter I got the bike started up easily, but it wouldn't respond to throttle at all, and had a really nasty lumpy idle. It would run marginally better with choke on but inevitably would foul up the plugs and cut out. So off with the carbs again, another thorough clean with brake cleaner and compressed air, but no matter what I did to those carbs I couldn't get the bike to run right. I must have had them on and off about five times so convinced was I that they were the problem, and I swear to f*ck brand new carbs aren't as clean as mine are now (or were).
Anyway, to cut an already long story slightly shorter.... - it was the battery. Whenever I'd started the bike, I'd jumped it off a van battery then quickly disconnected the leads, the bike would then run shit. If I charged the bike battery for about 2 days the bike would run fine for five minutes then start to play up again, I guess the battery was so uncharged that no amount of charging would satisfy it, and it was sucking all the power from the charging system. So to cure this problem, in the absence of sufficient funds to replace the bike battery, I have now removed my pillion seat and ratchet strapped the van battery to my bike, inside a hold-all with holes cut into it for straps and cables to go through, so it just looks like a bag strapped to the back. It adds a bit of weight but I don't half have some starting power now! If I ever ran out of fuel or broke down, I could probably make it home on the starter motor alone!
So, the lesson to be learned from this is.... ?
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piazza · Brolly Dolly Joined: 23 Aug 2008 Karma :

Work harder save more and buy the correct battery?

Can you run aircon from the bike now too? You should market this!!!

CaNsA · Super Spammer Joined: 02 Jan 2008 Karma :

https://i.imgur.com/7n41gJi.jpg

Clutchy · World Chat Champion Joined: 08 Nov 2011 Karma :

And this doesn't do any long term damage?
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clancy · World Chat Champion Joined: 11 Apr 2009 Karma :

Van battery on your bike ? How small is your van? the one in my transits huge, pretty sure it would blow your bikes electrics let alone how you would fit it on the bike in the first place
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Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

clancy · World Chat Champion Joined: 11 Apr 2009 Karma :

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

Still going to be a lot smaller than a pillion - probably a bit less volume than a small top box.

Captain Liberious · Two Stroke Sniffer Joined: 23 Feb 2013 Karma :

here tis! Think its somewhere in the region of 700amps, so yes I could probably run air con, stereo system, 40" plasma TV and a playstation on it if I wanted
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cb1rocket · World Chat Champion Joined: 30 Jan 2010 Karma :

700 cranking amps not how big the battery is, battery would weigh a fucking ton if it was!
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bikenut · World Chat Champion Joined: 21 Nov 2011 Karma :

cant quite remember but the cx has a cdi ign system, which only needs a battery to whizz the engine over fast enough to make the cdi system work ( and carbs etc ).................some cdi systemed bikes have a kick starter which works....ie the bike will start on a kick start so system must be capable of providing a good spark at relatively slow speeds, rate of change........etc.

so battery only needs to be big enough to start the bike, with some reserve for cold winter mornings etc....

how do you start the van now?

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

Sadly, I've been looking into this a fair bit for other areas - yes, that's cranking amps.
So, yes, it could run all of those. Cranking amps figures are for 30 seconds - it may just manage that if you're lucky.

You've probably got about 100ah battery. But you're only supposed to drain it a maximum of half power.
So that's 50ah @ 12v or so, giving 600watt hours.
A PS3 uses around 200w. A plasma TV, maybe 400w. Add in the inverter etc and you've around 800w usage.

However, the quicker you use power relative to the battery size, the less power you have. At 800w you're probably only going to have about 20ah usable.

So, You can run just a plasma TV and a PS3 from your bike battery for about 18 minutes.

HTH Very Happy