Reply To: Bike won’t fire cold but it fires once working = GT250R 2012
Hello everyone, hello Marcel,
So a month and some days passed and the bike is back into my hands. Mechanic replaced the regulator (funny story, he actually shipped the OEM regulator from Korea, unbeknownst to me, i would’ve obviously told him to not do it based on Marcel’s innumerous warnings, but that happened, the regulator fried like 5 minutes into running lmao, he’s also having issues with the warranty claim), anyways, he got another regulator that doesn’t heat up at all, fixed some terminals, fixed some dubious wiring, and mainly, did a LOT of testing. he also wirelooped the kickstand sensor, just to be SURE.
He was basically starting the bike multiple times a day for a week. Cold starts, rainy cold starts, inclusively rode in the rain, something he hasn’t done in years, all for the sake of the bike, let the bike sat in pouring rain. It seemed like the problem was done.
Bike came to my hands last Thursday, I had ridden it that same night and let it sat overnight.
Friday morning, you won’t bloody believe it but the goddamn thing didn’t start. I called him and he came over right away to witness this thing with his own eyes, it didn’t start up either on his hands. Not until he turned off and on the killswitch multiple times rapidly, did it start, lights fully off to allow for maximum voltage delivery to the starter motor & etc. Fuel pump primes loud and healthy. Starter motor cranks like usual, tachometer pointer goes up with each crank.
We thought okay well the killswitch has gone bad or its wiring.
Next morning, it won’t start up yet again, and won’t start up either with the killswitch trick. On a last completely desperate attempt i start opening the throttle and you best believe that thing started right up.
Few morning after, same thing but a bit roughier, it first only started on one cylinder for a few milliseconds before hearing the second cylinder kick in.
Morning after (today), it didn’t want to start even with the throttle trick, i had to move and wiggle the bick a bit on its suspension and it uncoughed up (while throttle was open, and ignition pressed).
My bike has demons!!!!! Can’t wait for tomorrow when I start it up again, might have to flip the bike upside down to get it to start.
Thing is, once it fires up, it runs perfectly for hours. I rode for 2 full uninterrupted hours on Saturday (2days ago), it rode just fine just perfect. Once the bike fires up, it fires up consistently for the next couple of hours, until it sits overnight.
Mechanic checked the stator like you asked, it seems in good shape.
I now have a fully new eletrical system basically. new headlights new regulator new battery new coils. got new plugs new caps, whole bunch of new fixed connections. But the thing still wont start, I guess we focused too much on the eletrical but the issue is something mechanical.
But the main thing that scratches the back of my head is why the hell does it fail on my hand but not on his?? he started the bike easily 20+ times in a week, including 3 nights asleep, and it started up. It also seems to prefer starting standing vertical and not on the kickstand, so much so that it doesn’t fire up on the kickstand.
Its something tricky thats position based, has to be, its the only explanation, also read about IAT, fuel injectors sticking closed when cold, fuel pressure in the rail can bleed off or the injectors themselves gum up. The issue is clearly something that slowly gets bad with hours passing, but then again, why did this not happen at the shop??? Grrrrrrrr!!
Sorry for the long post, but this is really getting on my nerves haha and my wallet is hurting 🙂
Thanks everyone.