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Get Your Own GPR Camp 4 T-Shirt

Last post by toratora « Sat Oct 05, 2019 3:39 pm
Posted in General Bike Chat
Replies: 1
by toratora » Mon Sep 09, 2019 6:39 pm » in General Bike Chat

First post

If you weren’t able to make it to GPRC4, but still want a shirt well now you can. This year’s shirts were upgraded in quality, and with Derbi,...

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More shirts went out today—thanks for the orders!! :paw_prints:

1 Replies

485549 Views

Last post by toratora
Sat Oct 05, 2019 3:39 pm

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New “Tank”

Last post by al_pritchard « Mon Mar 24, 2025 8:24 am

by al_pritchard » Mon Mar 24, 2025 8:24 am

The original “tank” cover has seen better days. Like most of them it’s got cracks running from the threaded inserts back along the upper tank. When I...

0 Replies

16446 Views

Last post by al_pritchard
Mon Mar 24, 2025 8:24 am
Gaskets for GPR 75 EBE075 engine

Last post by jkv357 « Fri Feb 21, 2025 7:57 am
Replies: 3
by jkv357 » Thu Feb 13, 2025 1:00 pm

First post

I need a gasket set, mostly head gasket, for my GPR75 with the EBE075 engine.

Is there a model designation for the EBE075 engine? Is it an...

Last post

Treats will get a gasket set with their next order.

Benji at Treats has been super helpful.

And thanks to Al for doing some digging to come up with...

3 Replies

106635 Views

Last post by jkv357
Fri Feb 21, 2025 7:57 am
EBE050 crank in EBS050 case

Last post by Ivaylo « Tue Feb 18, 2025 11:44 pm

by Ivaylo » Tue Feb 18, 2025 11:44 pm

So I have an Gilera SMT 50 which I want to upgrade, but I have read millions of articles and alla re different and don't answer my question. So I...

0 Replies

33030 Views

Last post by Ivaylo
Tue Feb 18, 2025 11:44 pm
Exhaust Gasket Question

Last post by al_pritchard « Wed Mar 01, 2023 11:03 am

by al_pritchard » Wed Mar 01, 2023 11:03 am

I asked this over in the Aprilia forum, and thought I would ask here as well.

I'm hoping someone can help me work out the gasket I need for the...

0 Replies

74914 Views

Last post by al_pritchard
Wed Mar 01, 2023 11:03 am
Rear Brake Cylinder Replacement

Last post by al_pritchard « Tue Oct 18, 2022 6:57 am
Replies: 6
by al_pritchard » Fri Sep 30, 2022 7:31 am

First post

Does anyone have any recommendations on a replacement rear master cylinder? I cant find any reasonable OEM ones on line. So starting to think about...

Last post

Here's one:

Was hoping not to order from overseas. Shipping can be almost the cost of the master cylinder.

I did find this: Brembo PS13B . It...

6 Replies

52415 Views

Last post by al_pritchard
Tue Oct 18, 2022 6:57 am
Exhaust Recommendations 80cc GPR

Last post by al_pritchard « Mon Oct 17, 2022 5:57 am
Replies: 9
by al_pritchard » Fri Aug 19, 2022 7:29 am

First post

This is the last open question / part that I need to find. So, looking for some thoughts, and recommendations.

2002 GRP 50 with an Airsal Extreme...

Last post

Most pipe designs I've seen have stinger pipe just welded on the baffle cone smaller end...

For some reason I thought I read something in Gorden...

9 Replies

71266 Views

Last post by al_pritchard
Mon Oct 17, 2022 5:57 am
Derbi GPR - transmission leak

Last post by benito brz « Mon Aug 02, 2021 11:43 am
Replies: 1
by jkv357 » Wed Jul 28, 2021 6:58 am

First post

My GPR started leaking trans fluid a while ago - and doesn't want to stop.

I need to pull the fairings and take a better look, as I can't see...

Last post

My engine was also leaking a lot from everywhere but not as much as you, because it was very old and from an abandoned bike.
Maybe your leak come...

1 Replies

32365 Views

Last post by benito brz
Mon Aug 02, 2021 11:43 am
Derbie GPR50 Front Wheel Installation

Last post by Reefyboy-15 « Mon Jul 27, 2020 9:09 am
Replies: 2
by Reefyboy-15 » Sat Jul 04, 2020 6:42 am

First post

Hi I am building a GPR50 for my grandson from a dismantled bike. Not hard but I am concerned on the fitment of the front wheel particularly the...

Last post

Hi jkv357
Thanks for the photo. The forks on our bike doesnt have a lug. However I found that the speedo hall effect magnet was missing so a look...

2 Replies

88892 Views

Last post by Reefyboy-15
Mon Jul 27, 2020 9:09 am
Shifter travel

Last post by jkv357 « Mon Jun 29, 2020 6:36 am
Replies: 1
by tbh37620 » Mon Jun 29, 2020 4:38 am

First post

Hey guys, wanted to get input on Euro2/ebe/ebs shifter travel. I have a GPR and also a Metrakit, along with a spare engine. All these engines have...

Last post

Can't give you any specific details, but I will say my EBE-075 shifts in a normal manner without excessive travel. I definitely don't need to raise...

1 Replies

64702 Views

Last post by jkv357
Mon Jun 29, 2020 6:36 am
Laser Rust Remover - Affordable now!

Last post by mattology « Thu Sep 05, 2019 11:37 am
Replies: 3
by Berkeley » Tue May 28, 2019 7:47 am

First post

Hi Guys,

We spoke about rust removal to clean up an engine a few week ago. This ad came up on FB so I thought id share it with you. Only $188.00...

Last post

hi there,

we have a few of the CleanLasers at my work. they are pretty cool for some things. you can do radiological decontamination with them as...

3 Replies

65112 Views

Last post by mattology
Thu Sep 05, 2019 11:37 am
AM6 Needle Bearing Specs / Availability

Last post by toratora « Mon Aug 05, 2019 6:39 pm
Replies: 1
by doubl3clutch » Mon Aug 05, 2019 4:47 pm

First post

Hi All,

I have a 99 GPR75, 2000 RS50, and a 2003 SM50. Am I correct in assuming these all have the exact AM6 Engine, other than the GPR75 top end?...

Last post

The Derbi bikes do not employ the Minarelli engines. Derbi makes its own two stroke engines for these bikes. One notable exception was the 2006...

1 Replies

61466 Views

Last post by toratora
Mon Aug 05, 2019 6:39 pm
D50b0 stock cylinder tunning

Last post by toratora « Sun Jun 30, 2019 6:23 pm
Replies: 3
by Jaxx » Wed Jun 19, 2019 2:36 am

First post

Hi,
sorry it isn't really GPR/RS, but it has D50B0 engine (bike is Aprilia RX 50 2016, more or less 'rebranded' Derbi Senda DRD R). Current setup is...

Last post

The stock oil pump is very reliable on a stock bike. But once you start tuning the bike it becomes compromised. It can’t keep up with the needs of...

3 Replies

75561 Views

Last post by toratora
Sun Jun 30, 2019 6:23 pm
RS50 AM6 "flat spot" advice

Last post by Rj_666 « Wed May 29, 2019 10:12 pm
Replies: 4
by Crunchbucket » Mon May 20, 2019 9:36 pm

First post

Please share any thoughts.

The last 2 rides I did on my RS50 I had to deal with a decently large range of my throttle seemingly not firing. The main...

Last post

All of the above being said.... MANY of us have wondered about the Athena 'Power Valve' kit. Could you give us a bit of background on the bike ?
Is...

4 Replies

67594 Views

Last post by Rj_666
Wed May 29, 2019 10:12 pm
Recommendations for performance shock

Last post by Dangerous Dave « Fri Apr 05, 2019 8:41 pm
Replies: 3
by grunbay » Wed Oct 24, 2018 4:15 pm

First post

I am building a 2000 Derbi GPR 80 (EBE075 motor) into a road racer. I need a rear shock absorber. The 2000 GPR 80 has a 10mm bolt fixing at the top,...

Last post

I had one custom built for my 2000 GPR by worxshocks.com . The first iteration wouldn't bolt up (due to the long neck previously mentioned here), but...

3 Replies

64624 Views

Last post by Dangerous Dave
Fri Apr 05, 2019 8:41 pm
Balancer or not?

Last post by RemS « Sat Mar 16, 2019 3:41 pm
Replies: 5
by grunbay » Wed Mar 13, 2019 3:44 pm

First post

I am building a Derbi race motor. I pulled the donor motor apart and have determined that the timing side is stepped with a woodruff key. I ordered a...

Last post

My mutiples crankcases GPR are notified « SENDA H »

5 Replies

75917 Views

Last post by RemS
Sat Mar 16, 2019 3:41 pm
Minarelli AM5 Engine

Last post by jscar « Fri Dec 28, 2018 2:51 am
Replies: 6
by jscar » Tue Dec 25, 2018 6:08 am

First post

I recently got NOS Minarelli AM5 engine cases with seals and bearings in it. Of course now I find out that my parts from an AM6 will not fit. That...

Last post

Thanks for your help and info but I think I found what I need from a supply house in Europe. Instead of jury rigging something I am buying a complete...

6 Replies

76546 Views

Last post by jscar
Fri Dec 28, 2018 2:51 am
RS stock carb question

Last post by toratora « Sun Dec 23, 2018 2:42 pm
Replies: 1
by jscar » Sun Dec 23, 2018 9:09 am

First post

I am a newb here on this site and actually ride, race and restore Rieju bikes from the early 2000's. I live in Vermont. Have three so far with the...

Last post

As far as I know the early classic RS 50s came with a DellOrto SHA 14, or maybe even a 12. Later bikes came with a carb that had a cable operated...

1 Replies

47086 Views

Last post by toratora
Sun Dec 23, 2018 2:42 pm
Shock Absorber Derbi GPR

Last post by RemS « Thu Dec 06, 2018 10:38 pm
Replies: 4
by RemS » Tue Dec 04, 2018 11:16 pm

First post

Hey.
I am going to place order for a shock absorber original Derbi.

It is an original shock absorber of Derbi GPR after year 2003.

The piaggio...

Last post

Thank you.

4 Replies

56985 Views

Last post by RemS
Thu Dec 06, 2018 10:38 pm
Another Master Cylinder Post

Last post by Rj_666 « Sun Dec 02, 2018 1:23 pm
Replies: 3
by grunbay » Sun Oct 21, 2018 4:31 pm

First post

I have looked over Tora's excellent Stop that man post, but I don't see on the site whether the Brembo RCS14 is appropriate for the 2-piston AJP...

Last post

RCS 14 is the BEST upgrade I've ever made to my RS50.

3 Replies

62288 Views

Last post by Rj_666
Sun Dec 02, 2018 1:23 pm
Front fork rebuild trick

Last post by toratora « Mon Nov 26, 2018 9:39 pm
Replies: 2
by grunbay » Sun Nov 25, 2018 4:05 pm

First post

I am trying to rebuild the Showa forks on my GPR. The bolt head that holds the large washer onto the central rod just spins. Is there a trick to...

Last post

Hey sorry I didn't see this sooner. I had some adventuring to do this weekend.

There are actually several fork rebuild photos, and accounts in my...

2 Replies

54011 Views

Last post by toratora
Mon Nov 26, 2018 9:39 pm
Carbon/Magnesium Wheels

Last post by toratora « Wed Nov 21, 2018 7:39 pm
Replies: 1
by Berkeley » Wed Nov 21, 2018 7:15 pm

First post

Hey guys there's been a lot of programs on 'tv' about using lighter wheels and with some saying what a difference it makes..

The closest I can find...

Last post

The older GPRs have skinnier wheels than the current bikes. The older bikes are more responsive than the current bikes, and it is my belief that it...

1 Replies

46579 Views

Last post by toratora
Wed Nov 21, 2018 7:39 pm
Rear Sprocket Question

Last post by toratora « Thu Nov 08, 2018 11:39 am
Replies: 4
by grunbay » Mon Nov 05, 2018 1:46 pm

First post

I have a 2000 GPR 80 (EBE075). The rear sprocket is in need of replacement. As I look into acquiring a sprocket, there seems to be a model year break...

Last post

From my understanding the 16 and 17 three spoke wheels from 2004 back are the same in the hub area. So there's no difference from the wheels being 16...

4 Replies

63060 Views

Last post by toratora
Thu Nov 08, 2018 11:39 am
Scooter Porting

Last post by toratora « Thu Nov 01, 2018 1:39 pm

by toratora » Thu Nov 01, 2018 1:39 pm

My buddy Jeroen put together some scooter porting pr0n which I thought might be fun to share.

0 Replies

43967 Views

Last post by toratora
Thu Nov 01, 2018 1:39 pm
Tire brand

Last post by kaldis12 « Sat Oct 20, 2018 3:59 am
Replies: 2
by kaldis12 » Sat Oct 20, 2018 1:35 am

First post

Hi,
I've looking for a new tire for a while now, but cant decide where to go. For front I want 110/80-17 for the rear 140/70-17. I have looked on...

Last post

Yeah thanks :)

2 Replies

52751 Views

Last post by kaldis12
Sat Oct 20, 2018 3:59 am
Brake masters

Last post by toratora « Wed Oct 17, 2018 10:39 pm
Replies: 3
by kaldis12 » Wed Oct 17, 2018 9:59 am

First post

I saw a few few brake masters on this forum but I dont know which one should i get. I have a 2 piston AJP front brake, but I would like to change the...

Last post

Brembo does make a shorty lever for the RCS. I actually have one on the DRP which came with the RSC15. Which seemed like the correct master to get,...

3 Replies

62856 Views

Last post by toratora
Wed Oct 17, 2018 10:39 pm

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