1995 dt25c

[pound4pound]

I have a 1995 DT25C and noticed that if started breaking up at a high rpm. My question is does this model have a rev limiter? This is the first time that it has done it in the 2 years that i owned it. Also i want to change the plugs in it. What would be the gap in the plugs? Any help would be greatly appreciated. I dont want to be stranded with this during the winter months.

Thanks
John