Bike not working
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Bike Model = : Gt650r
Hello I bought a gt650r with either electrical or carb problems I sent it to my mechanic and after 6 days I got it back and I rode it for 10 mins and it ran fine but the next day I took it out I got about 10 feet down the road before it backfired super loud and cut out this basically keeps happening with the bike unable to go more than a few hundred yards if your very lucky, I had the carbs fully rebuilt and cleaned  all the electrics had been rewired and fixed aswell as a few other things everything seemed to be working fine up until now so I was wondering if anyone has had similar problems I’ve given it back to the mechanic and he’s gonna try a new coil as sometimes it feels like one of the cylinders isn’t working but sometimes comes back and cuts out again mid ride so I’m not sure if that’s causing all the problems
if u have any questions or solutions please reply
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If it is a carb model (earlier than 2008) , then the issue likely will be either:
Wanning Stator (the pulse sensor may go haywire and the bike can’t run without it)
HT Caps = too common , so we tend to upgrade to NGK ones and forget.
Coils = There is a service manual on the forum that your mech can download to confirm the resistances in primary and secondary are within OEM range , unless the coil has internal failures  (likely caused by the failing HT cap or sparks arc’ing out of it) , try to make sure he puts a good coil there.
Plugs shot ? = Try fresh CR8E plugs to confirm, if the bike uses anything other than CR8E or CR8E LASER , it will make sure you get stranded, they dont like “IX Blue box” plugs (Iridium IX ones , not to be confused with the trusted Laser Iridiums)
Check the Regulator is in spec (#2 issue that is common, so unstable charging may make things haywire , if you see a chinese regulator, toss in bin and get Japan SHINGDEN MOSFET ones like the ones you see on this site , if your mechanic can do it himself , he needs to be aware of fakes out there)
If there is 3 things on the electrical side every 650 owner should do , would be NGK caps , Shingden RR & Good plugs.
Real OEM coils for the 650 (original) are made by Mitsubishi Japan and share with other suzuki bikes of the 90s , but Hyosung has since changed them to either Hankuk Korea (they are OK-ish) or Delphi (later EFi models)
Hopefully above ^ should fix it as we don’t want to replace the CDI or other black boxes on the bike as those are not made anymore, so do all you can to preserve it!
Good luck
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If it is a carb model (earlier than 2008) , then the issue likely will be either: Wanning Stator (the pulse sensor may go haywire and the bike can’t run without it) HT Caps = too common , so we tend to upgrade to NGK ones and forget. Coils = There is a service manual on the forum that your mech can download to confirm the resistances in primary and secondary are within OEM range , unless the coil has internal failures (likely caused by the failing HT cap or sparks arc’ing out of it) , try to make sure he puts a good coil there. Plugs shot ? = Try fresh CR8E plugs to confirm, if the bike uses anything other than CR8E or CR8E LASER , it will make sure you get stranded, they dont like “IX Blue box” plugs (Iridium IX ones , not to be confused with the trusted Laser Iridiums) Check the Regulator is in spec (#2 issue that is common, so unstable charging may make things haywire , if you see a chinese regulator, toss in bin and get Japan SHINGDEN MOSFET ones like the ones you see on this site , if your mechanic can do it himself , he needs to be aware of fakes out there) If there is 3 things on the electrical side every 650 owner should do , would be NGK caps , Shingden RR & Good plugs. Real OEM coils for the 650 (original) are made by Mitsubishi Japan and share with other suzuki bikes of the 90s , but Hyosung has since changed them to either Hankuk Korea (they are OK-ish) or Delphi (later EFi models) Hopefully above ^ should fix it as we don’t want to replace the CDI or other black boxes on the bike as those are not made anymore, so do all you can to preserve it! Good luck
thank you for the speedy reply I will relay this info to my mechanic hopefully I can come back to this thread with good news soon !
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