zrx swingarm pivot idea

working on an idea for the pivot bolt solution on my kz750 with a zrx1100 swinger. i know the the kz swing arm runs with four needle bearings(two on each side) and a sleeve between them. im wondering if i can get away with removing the ball bearing in the zrx pivot tube and replacing it with another needle bearing , then machine a new sleeve that run the full length of the pivot tube (instead on stoping at the ball bearing with the OD of the zrx sleeve and the ID on the KZ sleeve. thus retaining my OEM pivot tube bolt. Any thought or concerns? links to diagrams below.

www.bikebandit.com/oem-parts/1981-kawasa...e/o/m150570#sch87217

www.bikebandit.com/oem-parts/2000-kawasa...c/o/m149508#sch77886

This may help.
Steve
www.123bearing.com/

Thanks, I like that I can search for specific dementions. Unfortunately it doesn't look like I can replace the ball bearing with the correct ID for the kz pivot bolt. I don't see a problem with replacing it with another needle bearing so I can run a sleeve the length of the entire tube. I will most likely have a top hat space made up as well with a new ID

e

do you have a picture of the tube/factory bearings?

Our resident expert on this subject would be Leon ( Blackbanshee531 ) He does a lot of swingarm refitting for our membership.
He has a vast knowledge on this and makes conversion bushings to adapt parts from different bikes
Dave

Following this one with interest as I'm looking at putting a ZRX swingarm on an 82 KZ100 CSR. Rock on.

thanks guys. i currently don't have photos for the factory tube or bearings. i have the sleeve at work with the pivot bolt for measurements. im not disabling the bike just yet until i get most these part squared away plus i want to ride the DGR. I just ordered another kz pivot bolt to give to the machinist, and also ordered another OEM ZRX needle bearing (92046-1111) which will replace the ball bearing inside the right side of the ZRX tube.
i will have a sleeve that runs the full length of the pivot tube with the OD of the OEM ZRX sleeve and the ID to except kz pivot bolt. i will most likely have top hat style bushing turned as well to run on the left side of the tube just like the ZRX runs inside the grease seal.. i will let you guys know when progress is made

i just got back from dropping my swing arm parts off at my machinist. heres the plan .

-the right side of the swing has a larger ID then the left so he will be adding a sleeve and boring it so the pivot tube has the same ID as he left

- we are going to run two needle bearings ( p/n 92046-1111) on both sides of the tube like the KZ does

-then we will install seals (p/n92049-1181 ) on both left and right side of pivot tube

- machine work will include a new sleeve and two new top hat spacers
-sleeve will have the OD of the ZRX sleeve (p/n 42036-1259) and ID of the KZ pivot bolt (p/n33032-050)
- the sleeve and the top hats will be stepped slightly so they interlock to avoid any up and down shearing movement that could potentially cause bearing damage.


thats all for now, i will certainly include photos once my parts return