June 29, 20168 yr Moderator Not sure if it will do for the 125 though? Â I was going to say, check in the manual for the resistance values of the HT coils and the stator coils in the engine...and check them
June 29, 20168 yr Author Hi Airhead, Can't get a manual for the 125, Will check resistance tomorrow, though. Did open up to see stator (magnet thingy?) to check the three white wires from the CDI...all OK Now I know where that majigga is situated!!! Learning everyday!!
June 30, 20168 yr Cool, another red brown greener! Do you know if your viggy has ever had an engine rebuild? im just thinking wether or not the timing is out? but im guessing that she ran fine before this power cut, in which case the timing will be fine. Did you find out about this rouge spark coming from the HT lead to top of engine? If your close to Yeovil and can get the bike down here i'd have a look for you (extra pair of eyes and all that)
June 30, 20168 yr Author Hi Noise, Thanks for the kind offer ...we're way up north, could do with a fresh pair of eyes though but!!! Rogue spark was from split HT lead which we have cut back and fixed the problem Checked ALL electrics for resistance again this morning...all are OK, we're stumped! We have ordered a new CDI unit from China in the hope that this will solve the problem as we can't figure out what else it could be. Cheers, Sarah PS she ran OK before everything went melty!
June 30, 20168 yr Sounds like wiring gremlins to me, I had a similar problem a couple years ago, spark was also very weak. It turned out to be those white wires from the static coil  were oil soaked and when tested separately appeared to be fine but was bleeding current across, once I changed the wires problem solved,Â
July 1, 20168 yr Are all the plugs on the wiring loom clean? The pins could have become carbon'd up after the power surge thus not giving a good connection. Take them all off (1 by 1) spray some electrical cleaner in there which you can get from Maplins and give them a good clean with a cotton bud. Â
July 1, 20168 yr Have you got any accessories  on the bike like heated grips ? Only asking cos mine melted my fuses which can also cause problems further down the loom and can be a bugger to find.
July 1, 20168 yr 20 hours ago, Noise said: Cool, another red brown greener! Do you know if your viggy has ever had an engine rebuild? im just thinking wether or not the timing is out? but im guessing that she ran fine before this power cut, in which case the timing will be fine. Did you find out about this rouge spark coming from the HT lead to top of engine? If your close to Yeovil and can get the bike down here i'd have a look for you (extra pair of eyes and all that) Have you seen the "are you willing to help" thread in the bar
July 1, 20168 yr Author Thanks Guys, I live near Guisborough North Yorkshire, don't know if there is a map to show where everyone lives. We tested the white wires from the stator and checked all connections, all seem fine. Going to get a replacement CDI and see if anyone's got another 125 Virago to test it against
July 19, 20168 yr Author Hi Everyone... After buying a new CDI igniter from China...started first time! BUT a  bit of a burning smell came from the unit. All still works though....have I still got a problem? Still can't use it at the moment cos of faulty gasket on generator cover...oil leaked out, got a new one BUT Husband away working.... so is this something I can do on my own ? I will need to take off the gear lever and peg etc? Any advice very welcome...all your experience is appreciated Sarah
July 20, 20168 yr Hi Sarah, Well at least you got the bike started but I wouldn't trust all the tea in china (pardon the pun) buying one from there. I assuming you used ebay?
July 23, 20168 yr Author Hi Mr Tone... Yes, couldn't find one anywhere else....it's blown already...no spark again!! Back to square 1 At least I put my new gasket on and stopped the oil leak Has anyone got a source for another CDI?? Fed up now!! Thanks, Sarah
July 23, 20168 yr Moderator Yep. https://yamahaclub.com/forums/profile/24445-speedshop/ Forum member. Rebuilds and repairs cdi. Give him a try.
July 23, 20168 yr Author Hi Cynic, A rookie mistake I think!!! Just frustrated I can't  get back on the road, being a beginner and just getting the hang of it all and now no blooming bike I never thought that I would be so upset Thanks for the advice though Cheers, Sarah
_33963e.png)
_83bc35.png)
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.