Derbi gearbox bearing replacement.

Alle how-to die te maken hebben met Derbi.
Derbir100
Banden plakker
Berichten: 13
Lid geworden op: di 05 jan 2021, 18:32
Vervoersmiddel: Senda sm and gilera smt

Derbi gearbox bearing replacement.

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Hi guys. Sorry to use English. I'm just rebuilding my block and I'm wanting to change out the gearbox bearings. What tool do I need to pull the small roller bearing out of the case?
Many thanks and happy riding
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42
Pro tuner
Berichten: 1733
Lid geworden op: zo 20 okt 2019, 01:14
Vervoersmiddel: Aprilia RS4 50
Locatie: Oost-Souburg

Re: Derbi gearbox bearing replacement.

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You mean the one you cant get out from the other side ?

There are special tools for that or you can use bread.
Or i was told anyway, didnt try it yet.
You put some bread in the roller bearing and some metal part which fits in the bearing like a cap or something and than you tap with a hammer on it, more bread, repeat and repeat and it should come out.
bart_rs2
Beginnende tuner
Berichten: 216
Lid geworden op: vr 03 mei 2019, 11:01
Vervoersmiddel: 2010 Rieju RS2 Pro VERKOCHT
2005 Derbi Senda SM

Re: Derbi gearbox bearing replacement.

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Bread wont work with the rollerbearing. I got out by welding a nut in it, heating the aluminium up and extracting it with a bolt.
Derbir100
Banden plakker
Berichten: 13
Lid geworden op: di 05 jan 2021, 18:32
Vervoersmiddel: Senda sm and gilera smt

Re: Derbi gearbox bearing replacement.

Ongelezen bericht door Derbir100 »

Yes that's the bearing I mean. I may just have to leave it
Brommert_01
Pro tuner
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Lid geworden op: do 14 mar 2019, 19:36
Vervoersmiddel: Aprilia SX50(binnenkort 80), Derbi DRD ProRace 4(verkocht) & Derbi DRD racing Limited 2005
Locatie: Emst

Re: Derbi gearbox bearing replacement.

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I haven't changed that one myself, but cant you Heat the bearing up, jam a large Bolt in there, let IT cool off to shrink the bearing, Heat the engine casing and try to pul the bearing out with the Bolt?
MennoVE
Beginnende Derbi fan
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Lid geworden op: di 05 jan 2021, 15:13
Vervoersmiddel: Derbi senda xtreme -05

Re: Derbi gearbox bearing replacement.

Ongelezen bericht door MennoVE »

Derbir100 schreef:Hi guys. Sorry to use English. I'm just rebuilding my block and I'm wanting to change out the gearbox bearings. What tool do I need to pull the small roller bearing out of the case?
Many thanks and happy riding
I think you mean a bearing you can't hammer out? if so i think the tool is called a ''blind bearing puller'' i don't know if you meant that.
Brommert_01
Pro tuner
Berichten: 558
Lid geworden op: do 14 mar 2019, 19:36
Vervoersmiddel: Aprilia SX50(binnenkort 80), Derbi DRD ProRace 4(verkocht) & Derbi DRD racing Limited 2005
Locatie: Emst

Re: Derbi gearbox bearing replacement.

Ongelezen bericht door Brommert_01 »

jeah,
this:

https://www.wish.com/product/5d36e141c1 ... &share=web

to be honest, its worth the try for just €35, i dont think you'll need it more then 1 time, atleast i cant imagine another use for myself for it. any professional set is triple the price :thumbdown: so for a cheap china set its in my opinion worth a shot.
MennoVE
Beginnende Derbi fan
Berichten: 27
Lid geworden op: di 05 jan 2021, 15:13
Vervoersmiddel: Derbi senda xtreme -05

Re: Derbi gearbox bearing replacement.

Ongelezen bericht door MennoVE »

Yep that's it, you never konw what you might use it for but a cheap set will work for this.
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