Reply To: Where are the IAP sensors? – 2016 GT250R
A GV250 can start with a 9BS (factory size) as it is smaller than GT250 battery tray , you can start with 9AH, the GT250R has the luxury to use a much bigger factory size of 14BS since there is more inside the battery, you have a better chance of starting on a 14BS than 9BS , just simply it has more capacity & CCA. a CBR Honda can run on a 9BS battery , 9BS is common on many bigger japanese bikes of varying styles and different electronics.
IF you can’t find 14BS , try 12BS which is a nice middle ground anyway.
I can’t answer the starting questions to be 100% true as I don’t have the bike with me to do a deeper analysis , so i can only suggest likely cuplrits and reply to the error codes given by your ECU. However, if the ECU is saying the Lambda sensors need looking, it is a good idea before they fail mid ride.
If you go that far, you can see if the starter motor is tired (prematurely worn out?) and check your engine flywheel SPRAG CLUTCH , it should not be slipping but it won’t hurt to check. This allows you to also see the SPRAG SPROCKET teeth too (2 items to look at there)
Car = Turned Off yes, you can jump start the bike. but i would not depend on a car battery for a complete judgement, we might miss something else, we need to know the bike can run on its own battery first, it should not ever require more than double its original size.