Bike thought it best to stay at home today...(starting prob)

[mattUKNC]

Well, I was running on auto-pilot this morning (as normal) and rolled the bike out of the garage, choke on, turned key, hit the button...All the right noises and then it seemed like someone had switched all the lights on as the power in the battery just seemed to give up!
Plugged it into the optimiser and it was only reading 9.6v. I left it for 45 minutes and came back to try again, it was now reading 13.1v so thought that was ok. After a couple of turns it was dead again!
I'm sure that battery should hold a charge much longer than this.

Battery and R/R replaced last September.

In the car today so the bike is on charge all day, I'll check again when I get home.

[Cammo]

The good old nc30 electrical gremlins strike again!

Best thing to do would be to carefully go over the complete charging/electrical system to diagnose the problem/s.

Follow this fault finding diagram and it will get you to the cause of your problems:

http://www.electrosport.com/technical-r ... -guide.php" onclick="window.open(this.href);return false;

[mattUKNC]

Thank you. I've just started with a full charge over night as I'm wondering whether the bike doesn't like that short journey to work. Fingers crossed. :D

[mattUKNC]

After a night on the charger, fired up first time! :D
If it doesn't start when I leave work, I guess something's up.

[Neosophist]

probably reg / rec again!

I've known them die in a couple of weeks :O

Leakback test will check you don't have any shorts draining battery, multilmeter set to amps, disconnect the negative lead and use the probs of the multimeter to re-establish the connection, anythign more than 1ma and somethings draining the battery.

Failing that sounds like the battery isn't getting charge.

[mattUKNC]

I'll give a go at the weekend. Cheers. :)

[Cammo]

I would pay attention to the problems, an old nc30 I had only ever had charging problems once (dead at the button after a 50km ride), never touched it and it was fine for ever more.

It did nothing for the faith I have in the nc30 electrical system, so replace all reg/recs on nc30's with Yamaha units, buy new batteries for each new bike and leave them connected to a peak charger all year round.

Partly responsible for the problems is the wiring loom/construction itself, some of the connectors are poor and degrade easily. The rvf loom and system is far better (but the charging system is obviously still prone to problems!).

[Neosophist]

Yup, and buy the best battery on the market, (not necessarily the most expensive either) a Yuasa is fine.

For the extra £10.00 or so it's cheaper than a reg / reg!

[fastdruid]

FWIW A few times I've found a genuine oem battery to be a yuasa but cheaper than I could otherwise find a yuasa.

Worth at least checking with honda first anyway.

Druid