Derbi GPR50 2003 France project

benito brz · 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

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.

benito brz · 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.

Cleaning

After sandblasting

After painting

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

Jaxx · 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...

benito brz · 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...

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.

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

Lets rebuild the engine !

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

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

Some damages

Ok now I'm still waiting for my crankcases to be sandblasted

jkv357 · 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.

benito brz · 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

GPR Camp: Replica Racers

Derbi GPR50 2003 France project

Re: Finally the wheels are back !!!!

Re: Radiator glow up !

Re: Derbi GPR50 2003 France project

Re: Derbi GPR50 2003 France project

Re: Derbi GPR50 2003 France project

Re: Engine disassembly (part 1)

Re: Engine disassembly (part 2)

Re: Engine disassembly (part 3)

Re: Engine disassembly (part 3)

Re: Engine disassembly (part 3)