I got the motogp pants with sliders. The 2 did not match up of course, so I had to sew the mating half of the zipper to the jacket.
Hopefully the following may help someone who gets stuck like I did.
Here's what I did:
I eyeballed where the zipper would work on the jacket. Removed the mating half from the pants being certain not to sew it on backwards (it only works one way), I found some safety pins and placed them where I wanted the zipper to go. I also made a point to place it inside of the original zipper that came with the jacket so that zipper would not rub against me while riding.
I laced up the old sewing machine that we didn't know if it worked or not, and got to work.
To my surprise not only did it work, it added a "bonus" stitch on the underside. I only know this because the thread I put through the needle was black, and the underside had white stitching exactly where I had been (admittedly slighly crooked :bitchslap ). So that I felt better about the connection, I made three passes, which I assume to count as 6 stitches or three double stitches. It should be every bit as strong as the factory sewing.
I'm feeling pretty good about trying it myself. For one, I trust it will work out fine, so I saved the money, time and effort of taking to a professional. Also my wife had her doubts.
Advice to anyone going to try the same thing, use the zipper from the pants like I did, unless you have a large flap on your pants like I had on my jacket. My wife got a pair of pants in also, hers have next to nothing to really work with on the bottoms also. I presume this is just how all pants are, I could be wrong though. Another reason to attach to jacket which I can envision is if your jacket has some sort of liner with no flap, you can still just sew the zipper part onto the liner without much fuss. If you don't have enough room on the mated half of the zipper, you should probably attach it to a peice of a strong material, then proceed with sewing it to the jacket to provide you with more room to work with. This method, you would probably want to safety pin the addition material on, and presumably attach higher than the zipper itself would be to make up for the exrta distance.
Hope typing all this helps someone, but either way, I try...I try.:twofinger