Strange Electrical Issues (cont.)

fatjames · World Chat Champion Joined: 09 Jul 2011 Karma :

Hi All,

I thought my issues had been solved, based on advise from here and VTF. Unfortunately they haven't.

Based on advice from vtf I have replaced the coils, HT leads, spark plug caps and spark plugs (twice). I also found lose earth that I've sorted. The bike has recently had a new fuel filter, air filter, oil filter and oil and these issues started after I checked and adjusted the valve clearances (I've since re-checked these twice) I've also put new gaskets in the exhaust, and checked the carbs and rubbers for leaks.

The symptoms are the same as before, the bike will idle just fine but as soon as I try to add revs if just backfires. The weird bit is, that if I use any of the electrics it will rev. eg, if I hold the starter down, it will rev fine, if I put the indicators on, it will rev in time with the lights flashing. The main light on high beam improves the revs, but doesn't solve it.

It seems as though there is too much electricity?! I followed the wiring around the bike the best I can to try and I find a broken wire somewhere, but can't see anything that looks dodgy.

I can't get the bike to a mechanics til payday, so would like to try and fix it myself.

Any ideas would be gratefully received. I hate getting the bus to work.

Thanks
Fatjames

Beez · Nitrous Nuisance Joined: 17 Jan 2012 Karma :

I'm not much cop with fixing bikes, but I noticed you didn't mention the battery, have you tried another?
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'02 ER-5
'09 CBF125

fatjames · World Chat Champion Joined: 09 Jul 2011 Karma :

Budgetboy · Scooby Slapper Joined: 05 Apr 2012 Karma :

Faulty Regulator/rectifier by the sounds of it.
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www.Mailorderrepairs.co.uk We service your Carburetor's, Calipers & Suspension for less Also Bike repairs undertaken.

jjdugen · World Chat Champion Joined: 03 Jun 2011 Karma :

Amen to the reg/rec.... Classic.

Monitor the battery volts, rev it up (as best you can) anything over 14V and the R/R is fauty.
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Budgetboy · Scooby Slapper Joined: 05 Apr 2012 Karma :

Anything Below 13.4 or above 14.6 to be more accurate. Thumbs Up

@ 5000rpm btw, no other electrics on (no lights or indicators ect)
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www.Mailorderrepairs.co.uk We service your Carburetor's, Calipers & Suspension for less Also Bike repairs undertaken.

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

Earthing problem.

When you turn on an electrical system (close a circuit) it runs a bit better. This is suggesting that it is finding an earth connection using a different route through the loom.

If you haven't cleaned up your earth points, do so. Pay particular attention to where the coils mount to the frame.

Also try running an additional earth from anywhere on the frame to the battery negative terminal. Use good thick cable.

fatjames · World Chat Champion Joined: 09 Jul 2011 Karma :

fatjames · World Chat Champion Joined: 09 Jul 2011 Karma :

Ok, I stuck my multi meter on the battery and attempted to rev up the engine. It wouldn't let me, but even the slightest movement on the throttle and the meter was showing a range between 16.5 and 19. I assume that confirms the fuckedness of the reg/rec, so I've ordered a replacement.

Thanks all

jjdugen · World Chat Champion Joined: 03 Jun 2011 Karma :

____________________
The CBR900RR has been sold. Aprilia Falco worms its way into my heart.
Try Soi 23 on Amazon for a good read.... Self promotion? Moi?