Modern Vespa

Hey folks,

Any recommendations on how to remove these two bearings (needle and roller) and the bearing race on the flywheel side?

This comes from a ET3 small frame engine case.

Thanks for your input.

Scooter Mercato has a bearing extractor set.

https://www.scootermercato.com/Scooter-Parts/Factory-Tools/T-21467

heat the case up with a propane torch around the bearings. they likely will fall out. Or toss the whole thing in the oven @ 350 for about 20-minutes for same result. That usually works for me, without having to use an extractor

If you are using the extractors I find it often works better if you remove the needles from the driveshaft support bearing. There is a little nipple in the casing casing sometimes that stops the extractor getting between the case and bearing.

I haven't tried it myself, yet, but there's a video of someone stuffing pieces of toast into the needle bearing until it is pushed up out of its seat.

Haha I tried that after I broke a puller. It didn't work.

For the flywheel, weld a piece of iron bar and then hit it to come out. For the gearbox bearings I weld a bolt and use a slide hammer. I'd replace the flywheel bearing with a NU204…

This works 100%. I've used it in multiple situations.

You need cheap bread, and a punch that is very close to the ID of the bearing.

Same - total waste of time

How long do I apply Heat with torch?

Until it falls out?

Seriously, you won't damage the cases with a propane torch. It's not not enough. The cases are a BIG heat sink, though, so it can take some time to get there. Some people use a cheap hot plate for this sort of thing with good results, too.

This guys videos are great! He covers large and small frame engine bearing removal in this video. I wish I spoke Italian.

Go to the 9:30 minute mark to see how it is done.

if you turn on subtitles, you can then go into options and set it to auto-translate to your language of choice. I usually go with English, but you do you

Chandlerman

Thanks for the auto translate tip! I just tried it! I never knew it existed! That is awesome!

Hec

Yeah, I use it all the time. I try to watch the German scooter videos auf Deutsch, but if they get too colloquial, I can't keep up and it's a lifesaver.

It's also gotten a LOT better over the past six months or a year. Machine Learning for the win!

I'm going with a loaf of bread as well

You should post a video of this bread technique.

Bread works on the larger bearing. I did it.

See Random Tips and Tricks, page 14.

this being the bread method:

https://youtu.be/Xe-wm47OAP4

We only have seeded bread so all it manged to do is get the seeds everywhere..

Here ya go.

Random tricks, share your best little tips & shortcuts (Page 14)

Amazing. Probably takes some time. Hahaha.

Now what about the main bearing race?? What kind of grocery can I used to remove that?

Must be the cheap loaf!

I'll try it and let you all know how it goes!

someone will surely post something about adding JB Weld to the race and hammer it out.

Rhetoric aside, welding a piece of scrap to the race is the only way to properly do it.

A+, Keep up the good work.

That makes sense. It looks like those bearings are in blind holes. A couple MIG spotwelds to attach something to grab onto is a great idea. I used the remove the needles trick with heat to get out the selector box bearing on my 150 case. Heat is really your friend, so don't be shy. Even with a Map torch it would be hard to do any harm. A heat gun works pretty well too.