These bikes are just shite.
I can't remember exactly as my son had the same problem, side stand switch but I think I left the wires disconnected, ie: didn't join them together. Try disconnecting the two wires and see what happens, you won't blow anything up....
Is that 300km until your gauge reads empty or 300km until you actually splutter to a halt from lack of gas? My 2005 GT250 gets about 350km per tank. I usually fill it at the 325km mark and I've almost always got another 3L in the tank to go. The fuel gauges are an indicator but shouldn't be taken as the gospel. From what I understand the GT250R's have an electronic fuel gauge which may be more accurate to the analogue ones on our bikes.
Can't imagine why it would valve bounce when cold at 6000 and then run normally when warm up to 10,000. How long does this cold running last, my GV250 runs a bit hesitant - particularly when i come out of corners at lower revs - when I take off first thing these winter mornings but that only lasts 500 metres or so. That is probably running lean as I don't use thre choke, therefore less fuel is vapourising so its running lean. Once it warms up, the appropriate amount of fuel evaporates and the engine runs OK.
Sounds over choked. Would also explain fuel consumption. Wouldnt valve bounce cold then be fine warm. Cant happen. Take it to somebody that knows what they are doing.
Take it to someone who knows what they're doing.
CREATURE agrees, your brother is very wrong, if he wants to ride his bike he must follow restricted rules, if he wants to go out after 10pm he has to leave his wheels at home; no matter how painful that may be
Mrs Shrek is correct, your bro is very wrong. When riding a motorcycle, it is under the corresponding class, the same with a car and it's class, otherwise, why would you need all the different classes?
Hi The restriction still applies to the motorbike license. Just as the learner conditions applied to the motorbike when you were on your learners even though you had (i presume) your full car.
I've always used 4t gearbox oil in all my strokers (and there have been many) Also I dont use full synthetic in the gearbox .
Go to a motorbike shop and ask them for some 2 stroke gearbox oil. Use fully synthetic 2 stroke oil for the engine.