Xr 125 2004 model l-4 just cut out on me in fifth gear.....

[199o-ash-2oo8]

right anyways heres the full story me nd me mates went out for a ride couple of days a go and on the way home from our little bit of off roading my bike suddenly cut out on me on the motorway in fifth gear i think it over heated me self but anyways it cut out and i just put it in neutral and rolled to a stop then the bike wudnt start for a few minutes then when it did i put ma revs on it was just spluttering like fu*k and cut out it didnt have enuff power to set back off so i left it a bit longer it was all right so far home cut out 1 more time i done the same thing and got it back to mine and it hasnt been out since what could it be any mechanics who could know what it is im going to take it for a run tomorrow see if its still the same when it gets hot i was out on it that day for bout 4-5 hours straight

[I_Hate_Euro3]

[teabag]

Have done a few 5 hour runs on my XR125. If running for extended periods on M-Ways / A roads you should swap the plug for the higher temperature one (DPR9EA-9 instead of DPR8EA-9). This stopped mine loosing power.
Also make sure it is not running lean (look at the colour of the plug when you take it out). Lean running will make the engine overheat and eventually lead to burnt valves or a holed piston.
____________________
NS125R = 2 years > GSX600F = 7 years > XR125L = 3.5 years > SV650S........and a Citroen Synergie HDI for the kids.