Hi everyone hope you're all good, just wondering as to the specific parts you need to turn a bike into a paralever, I know basically I will need to replace the gearbox with a k1100 or k100 16v gearbox, and I know I will need to do the same with the final drive however would I need to do the same with the swing arm and drive shaft currently on the bike or would they be able to work with those two other parts?

Off the top of my head, I think you will need a transmission and a complete swing arm with drive shaft and trailing link.  I may be wrong, but I think the Paralever bikes had a different length rear shock as well.

Read this page of my blog:  https://k75retro.blogspot.com/2013/09/paralever-conversion.html

Ask me questions as I've done this conversion.  Swingarm and drive shaft will have to swap as well as the final drive.  You might be able to keep your existing transmission if it's a later model which has the parallel arm ears (no year and model of bike in your signature so I can't be certain).  There will be no holes but those are relatively easy to drill.

It helps to consider a K1100RS front end after doing the Paralever back end. The P/lever is about 50mm longer than a Monolever so you'll be adding wheelbase to an already long girl, hence, slower steering. The K11 forks with triple trees make the wheelbase closer to original and retain reasonably good steering rake/trail numbers. While there, use the wheels from a K11, then the brakes & master cylinder from a K11will be a nice addition. Hell, add the K11 throttle bodies and you'll have....oh, never mind. Just buy a K11

Its a 1987 so I think I'd be too early to not have to change the gearbox, I could potentially do different things later anyway so does anyone know if the 3 spoke wider wheels will fit onto the normal k100 rear final drive it should right?

Depends on the size of tire you intend to fit and the ability to add a second spacer without affecting tracking.  Refer to this document, a collection of forum posts and articles about K1100 and K1200 wheels : https://docs.google.com/document/d/0B3UPbNZRyr1reDNoZFZPcGlHa00/edit?usp=sharing&ouid=103651284721697278882&resourcekey=0-CAMLf_MMynNxfR6xPrXDhw&rtpof=true&sd=true


As far as the pre-provisioned ears that can be modified to mount the paralever, see the circled part on this diagram: