Honda qr50

[ROB20Y]

Hi i have just bought my 5 year old son a Honda QR50 it is in minter and had new rings last year, it starts and runs really well but when on full throttle it just start stuttering roll off the throttle and the power comes back again ?
I have been told that th QR has a restricter ring in the exaust somewhere does anyone know anyting about this ?Or could this be something else I decoked the exaust a week ago and boy did some crap come out of it.
If anyone else knows of any other tuning tips for this little bike it would be great to know.
Cheers
Rob

[kitped]

Hi Rob,
Can't help with the running problem just wondering how your sons getting on with the QR as my 5 year old is interested in getting a bike.

Jason