Bought an 08 gt250r with a bad motor. It's a super clean bike. pulled the head off and no piston no connecting rod. Bike only sat one month. I cleaned the carbs anyway.
I'll try to keep it very brief.
Bike idles on choke ONLY that's it if remove choke it dies.
I give any gas it dies it bog's and dies.
below is brief recap of my weekend.
swapped the motor from the 07(motor tested good) to the 08.
- front cylinder not firing / gas.
--- did some swapping of parts (swapped carbs plugs cdi coils harness) got the front cylinder to get half hot. water wouldn't bubble off when sprayed on it.
did another motor swap from an 09( motor tested good ).
- front header is not heating as it should.
--I took from the 09 the full harness, carbs(3), cdi(2), coils(2), rectifier, fuel pump, separate tank, another complete exhaust, new fuel petcock, and filter..
I have literally tried 3 separate carbs on the bike.
I was thinking there was a problem with the wiring harness
maybe the fuel pump part clogged.
maybe exhaust was clogged with parts of the piston and that was preventing flow issues.
maybe tank was dirty.
coils- because they always go out.
I didn't mention plugs or stator as those were changed when I did the motor swap.
So in short, I think I pretty much changed everything I can think of that would effect this.
I really thought it was going to be a harness issue after I swapped all of those parts.
And just to confirm the carbs were good I put them on another 250 and it fired right up and ran just fine.