james79 Posted April 9, 2011 Report Share Posted April 9, 2011 (edited) ok chaps not sure if many bikers on here but worth a try a have a 1994 honda fireblade and had problems today bike was running fine then about 7 miles down the road the speddo needle start going mental then stopped working about 2 miles later bike died - no power and i pulled over engine had stopped running but no lights was on in the dash tried to start it but nothing waited about 10 minutes and dash lights started working but bike wouldnt start as battery was very low so my mate picked me up with his trailor and took me home stuck on a spare battery and fired up first time didnt take it a run and have the other battery on charge so im thinking could the rectifer/regulator be faulty? any help would be great thanks Edited April 9, 2011 by james79 Quote Link to comment Share on other sites More sharing options...
John_R Posted April 9, 2011 Report Share Posted April 9, 2011 I think you might be right, there are ways to test the rec/reg unit with an ohm-meter. I had to do just that to my wife's CBR400RR a couple years back. Quote Link to comment Share on other sites More sharing options...
Blunderbuss Posted April 9, 2011 Report Share Posted April 9, 2011 ok chaps not sure if many bikers on here but worth a try a have a 1994 honda fireblade and had problems today bike was running fine then about 7 miles down the road the speddo needle start going mental then stopped working about 2 miles later bike died - no power and i pulled over engine had stopped running but no lights was on in the dash tried to start it but nothing waited about 10 minutes and dash lights started working but bike wouldnt start as battery was very low so my mate picked me up with his trailor and took me home stuck on a spare battery and fired up first time didnt take it a run and have the other battery on charge so im thinking could the rectifer/regulator be faulty? any help would be great thanks I think you've got it right, does sound like the regulator rectifier and Hondas of that vintage do suffer with them. David Silver are good for spares. Quote Link to comment Share on other sites More sharing options...
james79 Posted April 9, 2011 Author Report Share Posted April 9, 2011 going to buy a voltmeter tomorrow so i can try to do checks myself as got haynes manual Quote Link to comment Share on other sites More sharing options...
John_R Posted April 9, 2011 Report Share Posted April 9, 2011 (edited) Buy a multimeter, not just a volt meter, but I suspect that is what you meant. I think the fault tests were all in the Haynes for her bike, if not I Googled and found them that way. The cost of a new unit was shocking, thankfully we found a used one in good nick. Good luck, hope you get back out now the weather is improving! Edited April 9, 2011 by john_r Quote Link to comment Share on other sites More sharing options...
james79 Posted April 9, 2011 Author Report Share Posted April 9, 2011 Buy a multimeter, not just a volt meter, but I suspect that is what you meant. I think the fault tests were all in the Haynes for her bike, if not I Googled and found them that way. The cost of a new unit was shocking, thankfully we found a used one in good nick. Good luck, hope you get back out now the weather is improving! yeah i meant a multimeter and just checked manual and shows how to check think its about £60 for a new one Quote Link to comment Share on other sites More sharing options...
bruno22rf Posted April 9, 2011 Report Share Posted April 9, 2011 Try putting a voltmeter across the battery terminals when the engine is running-increasing the revs should see the voltage increasing-simples.If your battery has not been charged and discharged regularly over the winter then its most likely u/s. Quote Link to comment Share on other sites More sharing options...
inthedark Posted April 9, 2011 Report Share Posted April 9, 2011 Sounds like a new battery is all thats needed to me Quote Link to comment Share on other sites More sharing options...
debaser Posted April 10, 2011 Report Share Posted April 10, 2011 Loads of Hondas have the regulator/rectifier fault, however when testing them they seem ok. This is because they work better cool but as the bike warms up it stops working, something to think about anyway. IMHO It does sound like a R/R fault, but see how you get on with the new battery. ATB Quote Link to comment Share on other sites More sharing options...
John_R Posted April 10, 2011 Report Share Posted April 10, 2011 yeah i meant a multimeter and just checked manual and shows how to check think its about £60 for a new one £60 sounds OK. A new one was going to be a fair bit more than that for hers, being a grey import. I think we paid £40 for the used one and it has been fine since. Quote Link to comment Share on other sites More sharing options...
james79 Posted April 10, 2011 Author Report Share Posted April 10, 2011 charged first battery all night with oxford charger and says the battery is strong so will get a multimeter today Quote Link to comment Share on other sites More sharing options...
james79 Posted April 10, 2011 Author Report Share Posted April 10, 2011 (edited) just taken the rectifer off and unplugged it and you can see 1 of the 3 yellow wire connections been over heating the spade on the rectifer is all burnt looking and plastic at the base of it started melting also on the plug that goes into it is all black round that connection point so looks like its time to order new part Edited April 10, 2011 by james79 Quote Link to comment Share on other sites More sharing options...
Paddy Galore! Posted April 10, 2011 Report Share Posted April 10, 2011 i remember having an old cb360, had the same thing happen to me on the way back from colchester, the rectumfrier was under the battery box and was caked in crud from the back wheel, all the terminals had corroded and broke off as i cleaned and checked them. Left the bike at a pub and hitched a lift home.luckily having old bikes you seem to collect lots of spares along the way and i got a lift back to the pub from a mate and fixed it, quick bump start and we were away. loved that bike, did thousands of miles on her, fancy another now so if anyone's got an old 'un hiding in the shed??? Quote Link to comment Share on other sites More sharing options...
james79 Posted April 10, 2011 Author Report Share Posted April 10, 2011 thanks all for the input i have now ordered a rectifier so hope that solves the problem Quote Link to comment Share on other sites More sharing options...
ST3V3 Posted April 10, 2011 Report Share Posted April 10, 2011 looks like your on the right track only problem I see is you say the speedo was jumping all over the place which points to another problem as the speedo is driven by a cable from the front wheel Quote Link to comment Share on other sites More sharing options...
james79 Posted April 10, 2011 Author Report Share Posted April 10, 2011 looks like your on the right track only problem I see is you say the speedo was jumping all over the place which points to another problem as the speedo is driven by a cable from the front wheel i will see what happens after i put the new rectifier on Quote Link to comment Share on other sites More sharing options...
Justintime Posted April 10, 2011 Report Share Posted April 10, 2011 Think you will find the speedo is electronic on them not direct drive from a cable Quote Link to comment Share on other sites More sharing options...
Lord Geordie Posted April 11, 2011 Report Share Posted April 11, 2011 i remember having an old cb360, I had the CB350SG Was a nice bike I had the whole thing stripped down and sent the frame off to be blasted and powder coated in metalic looking purple. Had the wheels done too and the tank and plastics were canary yellow. Twin headlights and LED back end with micro indicators I loved that bike till the timing chain snapped The worst bits were the Engine mount bolts were siezed in the frame and took some removing and the swing arm was rotten through Quote Link to comment Share on other sites More sharing options...
james79 Posted April 14, 2011 Author Report Share Posted April 14, 2011 put on another rectifier tonight and things seem better not took it out yet as its raining heavy but headlights are getting brighter when you rev bike didnt do that with old rectifier and when at 4k revs there is 13.9 volts with lights on full beam when tested over the terminals so hopefully all sorted now, will know when i take it out for a good run just need the sun to come back Quote Link to comment Share on other sites More sharing options...
foxbuster Posted April 14, 2011 Report Share Posted April 14, 2011 put on another rectifier tonight and things seem better not took it out yet as its raining heavy but headlights are getting brighter when you rev bike didnt do that with old rectifier and when at 4k revs there is 13.9 volts with lights on full beam when tested over the terminals so hopefully all sorted now, will know when i take it out for a good run just need the sun to come back Hope its all better now mate-nowt worse than your pride and joy playing up! Bet you got some great roads up your way to use the 'blade. PS. Like your avatar!! Rossi Rules! Quote Link to comment Share on other sites More sharing options...
Gordon R Posted April 14, 2011 Report Share Posted April 14, 2011 Lubricate the speedo cable to cure the erratic readings. Quote Link to comment Share on other sites More sharing options...
james79 Posted April 14, 2011 Author Report Share Posted April 14, 2011 Hope its all better now mate-nowt worse than your pride and joy playing up! Bet you got some great roads up your way to use the 'blade. PS. Like your avatar!! Rossi Rules! yeah some great roads up here mate but got to watch the potholes and timber lorries that like to take both sides of the road Quote Link to comment Share on other sites More sharing options...
timps Posted April 14, 2011 Report Share Posted April 14, 2011 Lubricate the speedo cable to cure the erratic readings. 1992 & 1993 Fireblades were driven via cable off the front wheel, 1994 was the first year the 'Foxeye' blade came out, which had an electric speedo driven off a pulse generator from the gearbox sprocket. If the rectifier was playing up then it could interfere with the pluses causing the malfunction. Quote Link to comment Share on other sites More sharing options...
mrikirkby Posted April 15, 2011 Report Share Posted April 15, 2011 I know people use to fix those little fans that you get in the back of PCs on to the R/R on the VFRs as they were always over heating and dying not sure if you can do it on a Fireblade depends were it is situated ? Quote Link to comment Share on other sites More sharing options...
Jega Posted April 15, 2011 Report Share Posted April 15, 2011 Here you go mate have a read through this and it should all start to make sense. http://www.wemoto.com/info/Regulator_Rectifier/ Quote Link to comment Share on other sites More sharing options...
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