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Derbi GPR50 2003 France project

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benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Finally the wheels are back !!!!

Post by benito brz » Fri May 07, 2021 9:46 am

Hello everyone, my wheels are back from paintshop and they looks so good, this time without any defaults :starry:

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Then I've put some brake liquid in my front brake and rear brake, I was struggling to purge them, and I found some little details which wasn't helping me like the different "banjo screws" and a lot of dirt and rust in my master cylinder for the rear brake. But I finally won the battle and purge the front brake and rear brake and they're braking perfectly.

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User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Radiator glow up !

Post by benito brz » Fri May 07, 2021 10:00 am

I've bought a radiator for 30 euros on ebay and tried to restore it, the result looks clean to me.

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Cleaning

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After sandblasting

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After painting

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2 x

User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Derbi GPR50 2003 France project

Post by benito brz » Fri May 07, 2021 1:36 pm

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User avatar
Jaxx
Posts: 54
Joined: Wed Jun 19, 2019 1:41 am
x 38
x 25

Re: Derbi GPR50 2003 France project

Post by Jaxx » Tue May 11, 2021 11:03 am

That's really nice. I wish I had skills and all the tools back when I was 17... :open_mouth:
0 x

User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Derbi GPR50 2003 France project

Post by benito brz » Tue May 11, 2021 9:37 pm

Jaxx wrote:
Tue May 11, 2021 11:03 am
That's really nice. I wish I had skills and all the tools back when I was 17... :open_mouth:
Thanks you very much, I know i'm lucky to have all this stuff, I'm working since the age of 15 and earn money so it helps me a lot, now i'm 18.
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User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Engine disassembly (part 1)

Post by benito brz » Sun Oct 17, 2021 2:46 am

Lets rebuild the engine !

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User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Engine disassembly (part 2)

Post by benito brz » Sun Oct 17, 2021 2:55 am

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1 x

User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Engine disassembly (part 3)

Post by benito brz » Sun Oct 17, 2021 3:51 am

Some damages

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Ok now I'm still waiting for my crankcases to be sandblasted
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User avatar
jkv357
Posts: 219
Joined: Fri Dec 01, 2017 6:47 am
Location: WI
Replica: '99 GPR EBE-075
x 417
x 115

Re: Engine disassembly (part 3)

Post by jkv357 » Mon Oct 18, 2021 6:06 am

benito brz wrote:
Sun Oct 17, 2021 3:51 am
(SNIP)
Ok now I'm still waiting for my crankcases to be sandblasted
Why do they need to be sand blasted?

I would be careful blasting too aggressively, as the bearing mounting and sealing surfaces can be damaged.

It takes someone that is familiar with blasting aluminum engines parts to know where to blast - and where not to blast.
0 x

User avatar
benito brz
Posts: 120
Joined: Fri Sep 20, 2019 1:26 pm
Location: France
Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
x 82
x 78

Re: Engine disassembly (part 3)

Post by benito brz » Tue Oct 19, 2021 3:25 am

jkv357 wrote:
Mon Oct 18, 2021 6:06 am
benito brz wrote:
Sun Oct 17, 2021 3:51 am
(SNIP)
Ok now I'm still waiting for my crankcases to be sandblasted
Why do they need to be sand blasted?

I would be careful blasting too aggressively, as the bearing mounting and sealing surfaces can be damaged.

It takes someone that is familiar with blasting aluminum engines parts to know where to blast - and where not to blast.
I asked them to only sandblast the outside of the engine because the painting is falling apart , but they're not touching the inside because the painting is good.
I told them to be carefull, so they will use micro sandblasting
1 x

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