The intake and exhaust ports are very rough. As far as the taper goes, I can't remember. I'll try to get some pics before we put it back together tomorrow night so you can see for yourself.

I think the cam as well as heavier valve springs will help on the revving problem.

There are HD clutch springs available. I replaced my stock ones when I replaced the plates last winter.

 

Thanks for all the info 98!!

 

98lakota, How did you put supertrapp discs in you DG pipe. I have a DG pipe and Want to silence it a little. Thanks

 

Just get a set of the 4" discs and use one for a template. Drill the end cap of the DG pipe and tap the holes to match the bolts to hold the discs on.