Carb Model and (Fixed?) No start issue

[Joel]

Hello again,

My bike (’06 gt250) wasn’t starting on the starter after work (~10pm and 16-19°C) on multiple consecutive occasions, but ran fine after getting a bump start (however it was finicky but still started before work? ~12pm and ~ 22°C, so I guess a slight temperature change but surely not enough to impact anything?) but once I finally stopped sulking about it and attempted a fix, it fired right up with a small amount of choke and some throttle. Does anyone have any clues on why that might be?

And secondly does anyone know the carburettor used on the ’06 gt250, or any bikes that share the same carb?

Thanks for your continued help,

Joel 🙂

[♠️ MARCEL]

Hey,
You won’t need another carb as IMO as the GT250 carbies are all the same until 2008 (before the EFi switchover) . The fact you have a 2010 means you got the best carb Korea has as the early models had less moving parts inside the carb.

Can you try fresh CR8E plugs , then go for a ride , come back , remove both spark plugs out ?

Take a picture  (including the center and sides of the plug) be sure to let us know which is front or rear then I will advise what your mixture looks like from the clues given by the plugs.

Also when the bike is running  (riding) do you get a smooth ride all the way through ?   More detail the better.

IMO – The bump starts and what not can be electrical but lets see….., are you able to:

• Rev the bike to 5,000 rpm and hold it , = how many volts at battery
• Let the bike idle = how many volts is that at battery?
• How old / fresh is the battery and what size , brand is it ?  (They defo don’t like it when a weak battery is used , even if its 12v)

Advanced Checkup:

• Switch the meter to AC  (not DC)
• Go to your rear shock,  disconnect only the “triple yellow” stator plug from the engine.
• Because its 3 pins ,   Lets call them A B C
• Start the bike… and let it idle , then rev to 5000 rpm, hold it there….
• A + B = How many AC volts is that?
  B +C = ?
  A+ C = ?

Sometimes half of what you said points to a bad battery or charging system married couple  (stator & reg) – it’s a common thing here in UK due to harsh winters that push weak batteries out, alas also annoying the stators & reg trying to keep the bike running but i hope its not the case on your end as you are on the warmer side of the globe!   (Though,  “heat” is also the alternative enemy, so check stators and regs aren’t overly hot for no reason and check for burnt connectors)

Then again also check….

• Engine isnt being hydrolocked ?  (Floats burst , leaking fuel in to cylinders overnight or something) – I would change oil right away
• Solenoid Relay   (Common starting delay culprit)
• Starter Motor  (Old age , can make it wane)

Even more advanced but rare …
– Drain oil , open the stator casing nicely
– Have a very bright torch , look behind the flywheel , make sure all sprocket teeth are intact

You don’t want this below  (as missing teeth , can make it skippy or “missing” to starting instantly and sometimes the sprocket “misses” the starter motor , dropping the engine below the 600 rpm cranking speed , making the engine strain the starter motor more and the relay gets hot)

Sorry for any grammar errors , i type at super sonic speeds and happy 2024 ahead! ⭐⭐⭐⭐

// Meditation doesn't mean you have to sit still....

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