How to Remove 1986 450 Honda nighthawk seat? I used the key to unlock helmet lock, pulled up on lever and the seat unlocked. But it's not letting me pull and up to remove. Am I just too weak?

SOURCE: kwikset powerbolt 1000 keyless entry deadbolt lock with keypad

Make sure that the bolt hole on the jamb side is recessed enough so the bolt gets a full extension. Without this externsion the bolt will not engage the key release. So when you do your quarter turn you are actually turning more. Remove the strike plate and drill the hole deeper until the bolt can extend all the way. Also double check your key to make sure it is not spurred or worn.

SOURCE: !993 subaru legacy doors dont unlock

If it takes that much force to manually open the doors, and it's on the doors that are less used, then I'd bet it's a set of door locks and actuators in need of lubrication. 
Electric door lock actuators can easily be stopped or slowed down by resistance in the mechanism. This can be caused by corrosion, water getting into the door, and just old age and lack of use. I'd take the door panels off and take a peek. 
On the Legacy the panels pop off fairly easily. You'll need to pry them off carefully with a flat screwdriver. You'll feel where the fasteners are, where the panels are resisting coming off, and prise the panel gently and firmly at these points and they'll pop out. Once out you'll see the lock mechanism. 
Moving it by hand will tell if it's corroded or bound up. Apply some white litium grease to the mechanism, making sure to squirt/work it in, and then work the door handle/mechanism to get the lube into the linkage and actuators. Check the electrical contacts for corrosion while there and spray with WD-40 to protect them. This should free up the door mechanism and the actuators should then be able to do their job.
If after the above steps the electric actuators still don't work, use a voltmeter or circuit tester to check for 12V at the actuator when the door button is pressed. If you don't see any power, recheck that fuse and then the wiring back to the door harness. It's unlikely that this is the cause as its unlikely that you'd get only 3 out of 4 bad, but you never know in these old cars.
Hope this helps.

SOURCE: can't remove back seats of 2007 pontiac montana

Had same problem with my '04, yank HARD, lol. Warehouse guy walked up, grabbed the cord and bang! up it popped. Good Luck.

SOURCE: 2001 yamaha r1 seat problem

The lock is for the rear seat. Grab the back corners of the front seat peel/pull back the edges far enough to expose the screwheads, one on each side. Take your allen wrench remove both screws and your front seat will be ready to be reomved. I hope this info helps you.
Cory.

SOURCE: 1999 GMC suburban locks seize in locked postion

I just bought a 1999 Suburban and all of the door lock actuators were bad including the rear (barn style door) while I was replacing the rear door acuator I noticed that even with the factory mounting bracket on the actuator it was causing the door lock rod (the rod from the keyed cylinder lock to the actuator) was on a bind......the solution I came up with is adding an additional 3/4" spacer between the factory mount bracket and the door attach point. this solved any binding and the door lock works great now........also I used a lubricant on all the doors where the rods run through the plastic guides, which seemed to help quite a bit! Hope this help's.