It seems to me that the hole where the swing arm attached, should be more.
and the angles of the frame in the area of ​​attachment of the pendulum seems also other (I can only compare with pictures)
I would like you to mail the file to the assembly, but it's very large (and this is just the beginning!

Having had a proper look, it seems to me that the geometry is all wrong. I did the frame about a year ago now, so I'm sure I can make improvements. If you have any technical information I'd be glad of it as the birth of my 3rd child forced me to sell my 996 :(.

Hi Brent. Sorry I just saw this model now otherwise I would have given this advice earlier. For a mudguard I use surfacing, I just sketch on a side view an arc based on the shape of the wheel/tyre to as long as you want your guard to run. Sketch this on a plane projected 10/20?mm from say the left side of the wheel and repeat this step on the other side. Then you will have two sketches parallel showing the length and bottom edge of your guard. Then simply connect the two sketches with a 3D sketch from the start point of one sketch to the other. Another 3D sketch for the rears to connect and maybe a couple more 3D sketches to maintain the curve along the guard. The 3D sketches are curved obviously to shape over the tyre profile! Then go to surfaces/ lofted surface set the first two sketches as profiles and the 3D sketches as guide curves. Play around with that and you should be fine. If you need more help yell out and I'll upload a mudguard so that you can see what I mean.