stevie-boy-smith-jrII Posted April 1, 2016 Share Posted April 1, 2016 After having roughly a billion problems with my Yamaha xvs 125, I got it fixed and has been riding a dream lately....until now. The last two mornings when I've tried the ignition the battery has died about 2 seconds after pressing it and I've had to resort to bump starting it. I put a new battery in roughly 7 weeks ago(2800miles ago) and I ride it daily. Later on in the day after riding 30ish miles I can start it up no problem using the ignition but the charge just seems to run out overnight for some reason. Have I been sold a dodgy battery or is something mote sinister going down, any clues I'd appreciate. Link to comment Share on other sites More sharing options...
JimR Posted April 1, 2016 Share Posted April 1, 2016 sounds like the battery charging system is at fault .. this would answer the point that a 7 week old battery failed ... it was not being charged and died ! Link to comment Share on other sites More sharing options...
neversaydie Posted April 1, 2016 Share Posted April 1, 2016 Im inclined to think its a short somewhere, draining it overnight Link to comment Share on other sites More sharing options...
stevie-boy-smith-jrII Posted April 2, 2016 Author Share Posted April 2, 2016 I'm thinking it's maybe a short cause if it was a charging component that was buggered it would need bumped later on in the day as well but it's just in the mornings after not riding for 8/9 hours. I don't know shit about the electrics guess it's a visit to the garage damnit Link to comment Share on other sites More sharing options...
Moderator drewpy Posted April 2, 2016 Moderator Share Posted April 2, 2016 get a multimeter from maplins ands check you have 14v+ at 3k rpm. if its 12- 13v then your not charging. 1 Link to comment Share on other sites More sharing options...
neversaydie Posted April 3, 2016 Share Posted April 3, 2016 On 02/04/2016 at 6:01 PM, stevie-boy-smith-jrII said: I'm thinking it's maybe a short cause if it was a charging component that was buggered it would need bumped later on in the day as well but it's just in the mornings after not riding for 8/9 hours. I don't know shit about the electrics guess it's a visit to the garage damnit Nooooooooooooooooooooooooo. It'd be like givin em a blank cheque Take Drewpys advice, and have a look here http://www.electrexworld.co.uk/acatalog/Troubleshooting-3P-PMG-&-RR.pdf Link to comment Share on other sites More sharing options...
stevie-boy-smith-jrII Posted April 4, 2016 Author Share Posted April 4, 2016 That walkthrough looks complicated as shit lol I'm only beginning to use a multimeter, here's what i know so far .. At a standstill my bike reads 11.8v, when I turn the key to turn electrics on, it drops to 10.8 n slowly starts dropping, when I try to spark it it drops to 4.summit,, bike can't start on 4. So battery dies n then creeps up to 10.1 around 2 seconds after releasing ignition and when I take the key out it creeps back up to 11. I'm gonna give the walkthrough a bash Link to comment Share on other sites More sharing options...
stevie-boy-smith-jrII Posted April 4, 2016 Author Share Posted April 4, 2016 Bump started n was running between 12 and 13, after a few minutes running at high revs it was between 13 and 14. Link to comment Share on other sites More sharing options...
neversaydie Posted April 4, 2016 Share Posted April 4, 2016 Charge the battery up fully before doing any testing. You need to know you have a good battery before you fault find Link to comment Share on other sites More sharing options...
stevie-boy-smith-jrII Posted April 4, 2016 Author Share Posted April 4, 2016 It sits at 11.8v the now man Link to comment Share on other sites More sharing options...
neversaydie Posted April 5, 2016 Share Posted April 5, 2016 Not enough. Charge it up, needs to be 12.5/12.7, no less, and holding that steady Link to comment Share on other sites More sharing options...
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