Hey all I have got a dt 125 r 1996 when riding it will not go over 6k sometimes a little bit more just sounds like it is losing the spark every now and then but is fine all revs up to 6k it does it in neutral but allows me to get to 8k I have recently done crank seals and it run fine after that so checked all magneto an stator they all look fine I'm very stumped now can any one help

There is a video on you tube showing what I mean. Ill post the link soon

I have changed spark plug

Cleaned the carb

New coil and lead

Checked all wires for wear

If any one can help would be much appreciated

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