Anyone heard of this before??

[minispacekidu...]

Hi there, been out on my cbr600 2day as it been a lovely day for it, only thing is whn i got home heard this hissing noice, and took the seat off and its cuming from the battery, and it looks like it about 2 twice the size! I cant think of wat would cause this? Any one have any ideas??? Rdiding for about 2hs would that have anythink 2 do with it?? Thks Andy

[ms51ves3]

Blocked battery breather.

[tafflade]

if its twice the size then the battery must be hot and under pressure for the plastic to expand, there's something very wrong going on there, I would suspect that one or more of the cells have gone to pot somehow.

Battery acid is nasty stuff so I would be taking precautions incase it went pop to protect myself from an acid shower.

I would switch everything off, disconnect the neg and leave it cool down before trying to do anything else.

[sickpup]

sounds like the Reg/rec is blown and massively overcharging your battery.

[Finglonga]

Whatever causing it a new battery is needed and check your charging system as well or it will destroy a new one in no time.

When you remove the old one check the electrolyte level to see if you have boiled it dry or if it is a blocked breather.
____________________
Andy Sez....
F.Y.Y.F.F.

[stinkwheel]

You need to be very, very careful if your battery is bulging like that.

Seriously, battery acid is very nasty stuff. I'd be wearing nitrile gloves, a face shield+ goggles and oilskins with a couple of buckets of water standing by.

If it pops, it could blind or permanantly disfigure you.

The gas given off is hydrogen gas which is highly explosive so take care not to make sparks as you remove terminals too.

So, all geared up, I'd remove the cell covers to relieve the pressure first, then remove the battery and dispose of it.

Then you can start looking for the fault.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Odie]

[neatbik]

Yep, sounds like the reg/rec.

The same thing happened on my old Honda cb1, it totally cooked my battery though and left me stranded by the roadside..

[yen_powell]

Is there a smell like rotten eggs?

I rode across Eire on my FJ12 and everytime I stopped at lights in small towns I accused my mate of farting.

He kept denying it, got quite annoyed in the end. Turned out it was my battery boiling over, regulator had gone kaput.
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Blackmail is a nasty word........but not as nasty as phlegm!
XT1200Z and a DR350 in bits

[binge]

The CBR400s eat rectifiers. All the CBRs use the same rectifier though, So they are easy enough to get hold of.

Replace it with one like this. It will fit but its the proper heat sink style, Rather than the silicone filled version.


https://cgi.ebay.co.uk/REGULATOR-RECTIFIER-For-CBR-600-900-1100-VFR-750_W0QQitemZ250381140735QQcmdZViewItemQQptZUK_Motorcycle_Parts?hash=item250381140735&_trksid=p3286.c0.m14&_trkparms=72%3A1683|66%3A2|65%3A12|39%3A1|240%3A1318




I'm not saying buy it from hong-kong. Thats just an example of the type to get.


I used to carry a spare rectifier under the seat of my NC29. It used to fry them every 6 to 8 months!




Ben

[hmmmnz]

get a mosfet controlled reg, they are miles better than the usual scr solid state crappers
read this
https://eviltwinsbk.com/forumz/index.php?topic=276.msg2479#new
and all will be explained,
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[Itchy]

Or just put an alloy heatsink on the reg rec and stick a PC fan off it which will run at 12vdc nicely and keep it cool for the hottest of places.
____________________
Spain 2008France 2007Big one 2009 We all die. The goal isn't to live forever, the goal is to create something that will. In the end, your life will flash before your eyes. Make sure it is worth watching.

[hmmmnz]

thats a fairly time consuming way of doing it, why not fix the problem instead of just masking it??
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[Itchy]

[hmmmnz]

only if you buy a new one
im not saying that a fan ect is the wrong way, ive done it myself and it is the best way to deal with them,
but you can get better reg recs that you'll never have a problem with again, surely that is worth the price
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[Phoenix]

It doesn't work either, I fitted a PC heatsink and fan to the regulator on my Fireblade when I first got it, it's since gone aswell, at 24,000miles which is about average, my last Blade one went at about 30K.

[minispacekidu...]

thks everyone! That a great help, didnt fancy it exploding on me while riding!! Il let u knw hw it goes