Biker nuts needed!!

Jeansy001 · Nova Slayer Joined: 10 Jul 2009 Karma :

Hi all, I just got rid of my 125 and moved up to my first real bike. I bought the CBR 400 hoping to get a bit more reliability of of a honda than an Aprilia. I took it for a spin the other day and the bugger just cut out on me.
I took the seat cover off and the battery had seriously overcharged that it had inflated ( i was lucky it didn't blow and burn my legs ), the regulator had blown so the battery was overcharging and it also destroyed my starter solenoid. can anyone help me to understand why this might have happened and give me some directions on replacing the parts. i'm a bit skint so i cant pay £30 and hour to take it to a garage as much as i would like to get it professionally checked. I don't need anyone to tell me just take it to a garage because that's no help. I need real advice from people who know what their talking about.
please help guys Wink

tutton · World Chat Champion Joined: 04 Jan 2008 Karma :

CBR400's and VFR400s of that age are notorious for the reg/recs frying themselfs alive, the common solution is to get a bigger one with fins like one off a cbr600f.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

Jeansy001 · Nova Slayer Joined: 10 Jul 2009 Karma :

do i fit the regulator just the same then?? it wont affect the amount of charge flowing back into the battery no? are there any adjustments i have to make to other components in order fit the new cbr 600 regulator?

mistergixer · World Chat Champion Joined: 15 Jun 2005 Karma :

tutton · World Chat Champion Joined: 04 Jan 2008 Karma :

Fair enough Laughing

Yeah get one thats got similar wires like the cbr one should be wire it up the same, should be no other adjustments needed, pretty sure youll need a new battery now as that one will be fried...
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

Jeansy001 · Nova Slayer Joined: 10 Jul 2009 Karma :

yea the battery is more than fried. i'm lucky it didnt explode as its swollen like a balloon. it would have been a trip to the hospital with third degree burns on my ass and bollocks if it didn't cut out. thanks for the help guys Wink

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

The connector block on a different reg/rec unit will not be the same or have the wires in the same order but Honda use the same wire colours throughout their range. As long as you connect yellow to yellow, black to black, red to red etc, you should be fine.

If you need help with what to connect to where, ask.

For a quick and dirty check of the alternator, disconnect the reg/rec and get a multimeter set on resistance.

On the terminal block which normally connects to the reg/rec check that:

Every pair of yellows has the same resistance.
Every yellow to green has infinate resistance.

Anything different and there is a fault in the alternator.
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“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.

andys675 · World Chat Champion Joined: 08 Feb 2007 Karma :

seen a few guys fit PC processor fans to the reg/recs on honda's