O.K., here's what I've done on my Z. I like the easy-access method.
Looking under the seat and under the quad, it gets pretty busy under there between the recess for the battery, the pocket for the tool kit, and provisions for the factory seat latch mechanism. Trying to fit one of the aftermarket seat retaining kits gets to be a challenge of sorts. I figured out a pretty straight forward way to acheive a positive retention for the seat, at a fairly inexpensive cost.
-It all starts with the purchase of a 3/8" x 3" hood pin kit available almost anywhere that sells auto parts
-First, on the underside of the seat, at the extreme back, there is 2" long x 3/4" diameter locator that you will drill a hole straight into the top with a 5/16" drill bit (see figure 1). Drill down until you've reach the foam part of the seat (be careful not to go all the way thru).
-Next, clean the plastic shavings out of the drilled hole and proceed to tap the hole (all the way to the foam) with a 3/8"x 24 tap. Again, clean the plastic shavings out.
-Next, drill a 3/8" hole in the body where the part that you drilled originally located the seat. (See figure 2).
-Next, if you purchased a 3" hood pin, it's necessary to cut a 1/4" off of the threaded end. Then, thread the hood pin into the seat where you tapped it, leaving around 3/4" to 1" between the hole in the pin and the plastic locator that you threaded it into. NOTE: this is only done the first time to determine the correct length that the pin will protrude out from seat.
-Next, mount seat to quad, and adjust pin by turning with a small phillips screwdriver or "awl".
-Once the correct depth has been determined, use a marker, and make a mark on the pin at the edge of the white plastic part of the seat because you will be removing the pin so you can apply epoxy to bond the pin to the seat.
I use a two part epoxy that bonds plastics and metals and can be had again at any auto parts or hardware store. Because of the threads, it won't take much to accomplish this task.
-Once the pin is out, apply the two part epoxy onto the threads of the plastic seat, and even spread some "tightly" on to the threads of the pin. (The crucial part is to get the epoxy onto the threads of the seat first, because if you just apply it to the pin, the plastic will remove a good portion of it as the pin is inserted).
-Insert the pin, and thread up into the seat until your mark hits the plastic part of the seat. Quickly move over to the quad before the epoxy sets up and trial fit the seat while you can still turn the pin. Remember to install the device that you'll use to hold the seat in place (See figure 3)using a hair clip or torsion clip, before determining that you're done.
- Now, just let the epoxy set up for the correct time indicated by the manufacturer, and Voila! you're done! It took me longer to write this, than it does to perform it. I've done a couple of seats already and it's a cinch.





