In my conversion of a 50cc ATV engine to a 90cc+ scooter engine, I have found how hard it can be to remove the rubber bushings that are usually installed on an ATV engine from their mounts. I don't know if being new, and unused makes a difference, but they were really hard for me to remove.
I found that a 1 1/4 hole saw fit the ID of the bushing very well.
I drilled pressing fairly hard for a bit, then let it cool off for a moment. I also found using a bit of oil helped reduce heating and made things go smoother, and quicker.
After drilling the centers out, I thought I had it made, but turns out that was the easy part for me. I could not get the metal sleeves out using a hammer and chisel. I was being careful not to damage the case flanges or anything else, and I just couldn't budge them. I came up with an idea to weld a washer inside, and to use a slide hammer to push it out.
While it did work, it was still quite a job. I ended up setting the very edge of the mount on the vice and then hammering the yell out of it with the slide hammer. Once I got the sleeve moving just a bit, it became a little easier, but I was still surprised at the force required to get them both out. Now, if I can just find the bearings I have that go back in place of the rubber mounts, I am 1 step closer!
Last Edit: Nov 20, 2017 19:00:46 GMT -5 by 90GTVert
Just Keep Riding! 2T's Forever Kymco ZX blue: 75cc - 48mm bore X 41.4mm stroke Iron/AC Kymco ZX naked: Current project: Honda Elite/Kymco ZX Naked Custom
Post by FrankenMech on Dec 16, 2014 21:40:53 GMT -5
Regular bushings on cars etc are not much of a problem with a few tricks.
The same tricks can be used on a scoot case. Use a propane torch to heat the metal on the outside or the center sleeve depending on where you want to release the rubber bond first. Melting the rubber bond will release the part and they will slide out like a greased pig. Let the parts cool. It really does not take a lot of heat. The rubber melts easily.
Put a bolt and long washer through the center of the bushing. Or as the case may be apply heat with the torch to the outside of the bushing housing and the rubber will slide out, or use a nasty screwdriver to pry it out.
Use a hacksaw to cut the outer sleeve on the side towards the case where the thick metal is. Use a center punch and collapse the sleeve inward on itself. Clean up any mess and corrosion.
Use anti-seize on the new bushing inside and out and also on the case. A bolt and a few washers can be used to pull the new bushing into place. Wipe off the excess anti-seize.
Solid bushings or bearings can cause a lot of vibration to be transmitted into the frame.
Senna1Rossi: Thanks renagade281!
May 23, 2016 14:59:12 GMT -5
Fox: I don't really know how to say this but straight. I am Dave's Girlfriend Kellilee and bluntly and VERY SADLY he passed away early Tuesday morning. I know he would want ya all to know this. Thank You Brent for befriending my love he was very happy on here!
Jun 18, 2016 16:26:04 GMT -5
Fox: www.gofundme.com/29mgf6b8 I hope it is ok to pass on his gofundme page link. If not you will un-post it I'm sure. Thanks again all!!
Jun 18, 2016 16:31:18 GMT -5