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The "UN" Official Derbi GP1 Thread

Last post 03-06-2016 03:41 PM by lead runner. 56 replies.
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  • 11-03-2013 01:49 PM

    The "UN" Official Derbi GP1 Thread

    I have searched the www and not found a good resource for info and mods and well all things Derbi GP1.

    Most of those in the know... know that there has been some contraversy surrounding the Derbi product in its short lived life here in the grand 'ol land of Oz, BUT  that said; those in the know... know that there are few if any scooters quite like a Derbi Gp1 50cc 125cc or 250cc.

    I know, I've read the ride reviews of people on this very site, and they all seem to love the "idea" of the Derbi GP1, heaven knows I do!

    So without further ado, may I present....... pause for effect.......

    THE OFFICIAL  GP1 THREAD  

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
  • 11-03-2013 01:59 PM In reply to

    Re: The Official Derbi GP1 Thread

  • 11-03-2013 05:02 PM In reply to

    Re: The Official Derbi GP1 Thread

    Thanks for that one pyrah!

    And for the next and most comprehensive one check this one out!

    http://scootercommunity.com.au/forums/p/15227/110655.aspx#110655

    This guy has done all manner of things!

     

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
  • 11-03-2013 10:01 PM In reply to

    • csomole
    • Top 500 Contributor
    • Joined on 04-25-2008
    • Brisbane
    • Posts 65

    Re: The Official Derbi GP1 Thread

    A nice memorial to the late Derbi GP1.

    It has not been imported for some years and production appears to have stopped too: the GP1 is not listed on derbi.es any more.

    It now becomes a matter of tracking down parts to keep our bikes on the road.

    So far I found
    http://www.easyparts.nl/ – comprehensive, very clear
    http://www.ajsutton.co.uk/ – comprehensive, less clear than the Dutch, with some cheaper prices

    The Oz importer still has some parts left, but takes a while to respond to queries and his prices are higher than the above.
    http://derbi.com.au/Contact.html/

    Strangely, I could not find any Spanish sites.

     

  • 11-03-2013 10:40 PM In reply to

    Re: The Official Derbi GP1 Thread

    I thought when the Derbi importer ceased selling in Australia someone else was selling the GP1 250 . Presumably old new stock but cant find a link or maybe it was the Derbi importer selling the old stock off  

  • 11-04-2013 02:17 PM In reply to

    Re: The Official Derbi GP1 Thread

    You can still get one brand new from here

    http://www.sportswiseshop.com.au/

    2010 build and there are still heaps of parts too.

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
  • 11-04-2013 03:45 PM In reply to

    Re: The Official Derbi GP1 Thread

     http://www.sportswiseshop.com.au/

    Wink Cheers that the one so i wasn't going mad well not fully quite yet Yes

  • 11-04-2013 05:29 PM In reply to

    Re: The Official Derbi GP1 Thread

    Yes mate, they also have a gp1 50 racing. It's the one with the engine midmounted. $3750 is alot but it is the only scooter like it I think.

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
    Filed under:
  • 11-04-2013 08:08 PM In reply to

    • GP1er
    • Top 500 Contributor
    • Joined on 11-03-2013
    • Brisbane
    • Posts 47

    Re: The Official Derbi GP1 Thread

    Hi everyone,

    Cool forum! Yes

    Nooob here, been lurking for so long.

    Anyone tried GOLDfren sintered compound brake pads?  
    http://www.1motoshop.com/motorcycle-atv-brakes/526-goldfren-brake-pads-233ad.html
    http://www.1motoshop.com/motorcycle-atv-brakes/476-goldfren-brake-pads-211ad.html
    Did you see the part compatibility list further down on the page?
    Even cross-reference codes, too.

    Another parts supplier that I think has been mentioned somewhere in this forum is 
    http://www.derbiscooterspares.co.uk/

    What tyres are you guys happy with?  I'm presently on Michelin Power Pures, but I'm wondering about Pirelli Diablo for the rear.

    Mick :)

    I check the SC when possible: please, no pm's or emails :)
  • 11-04-2013 08:28 PM In reply to

    Re: The Official Derbi GP1 Thread

    G'day Mick 

    Welcome to SC!

    Keen to see some pics of your ride with special attention to those mods you've done.

    How are the Dr pully sliders? Did they alter your top speed any? I bet the take off is awesome!

    I've run the Power Pures they are really good but as I use mine as a daily commuter they wore out a bit quick.

    The Michy City Grips are awesome in the wet and really good everywhere else and from a local Motorcycle store are only $69 fitted each!

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
  • 11-04-2013 09:07 PM In reply to

    Re: The Official Derbi GP1 Thread

    Some sweet custom Gp1's Check em out....

      

    And this BUNKERS GP1 Racing 50cc

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
  • 11-05-2013 07:28 AM In reply to

    • GP1er
    • Top 500 Contributor
    • Joined on 11-03-2013
    • Brisbane
    • Posts 47

    Re: The Official Derbi GP1 Thread

    I arrived at 8g weight sliders by process of elimination.....so I have a few hardly used sets of sliders collecting dust.  If the weights are too light then fuel consumption would go up if doing lots of low speed city riding because it's under geared.  You get great acceleration, but the engine would always be revving high & nervous, not using torque.  If the weights are too heavy then fuel consumption goes up if doing lots of highway/high speed riding because it's overgeared for higher speeds.  I did have some belt rubbing when it was overgeared.  I also tried a Malossi belt plus sliders which was very bad, being overgeared, belt rubbing badly, boggy throttle response at high speed, never reaching top speed.

    With 8g weights, ideal revs & horsepower for me are just about reached with top speed of about 125.  It's no use with heavier weights as there's not enough Hp to push the bike faster.  8g weights did eliminate clutch shudder Yes  I use oem spec Dayco belts from GPS Imports,  Dr Pulley slider weights from http://www.drpulley.info/shop/index.php?cPath=47_59

    I am still a bit overgeared (but no belt rubbing) with using a larger rear tyre of 130/70 than 140/60, because I wanted the stiffer 63P load rating than 57P with Power Pures.  I don't have a great mathematics ability, but I think the larger diamiter rear tyre works out to a 7% increase in gearing.

    OEM spec Dayco belt
    OEM variator
    DP 8g slider weights

    Clutch bite @ 4,000rpm
    Dropout @ 15kph
    40kph = 4krpm
    60kph = 5.1krpm
    80kph = 7.1krpm
    100kph=8.1krpm
    max speed = 125kph @ 8.5krpm
    ....all with the taller rear tyre.
    "Dropout" means when the clutch disengages while riding at low speed.

    4,000 rpm with DP's vs 2,000 rpm with oem setup.....so that's a lot of extra horses behind the belt when the clutch engages.
    I only get a little bit of belt slip if I suddenly go full acceleration from zero.....so the 1st second or two I accelerate half throttle.

    I really think it's the cheapest bang for buck mod.  The throttle response when going uphill coming out of an 80kph corner is really good, but with the old oem rollers it was boggy.

    I'll get some pics when poss. 

    Big Smile

     

     

     

    I check the SC when possible: please, no pm's or emails :)
    Filed under: ,
  • 11-05-2013 08:32 PM In reply to

    • csomole
    • Top 500 Contributor
    • Joined on 04-25-2008
    • Brisbane
    • Posts 65

    Re: The Official Derbi GP1 Thread

    lead runner:
    Some sweet custom Gp1's Check em out....

    The number of dings mine has been collecting, it will be due for a full respray soon ...

  • 11-05-2013 08:43 PM In reply to

    • csomole
    • Top 500 Contributor
    • Joined on 04-25-2008
    • Brisbane
    • Posts 65

    Re: The Official Derbi GP1 Thread

    GP1er:
    Another parts supplier that I think has been mentioned somewhere in this forum is 
    http://www.derbiscooterspares.co.uk/

    Yes, I forgot that one.  I got some indicators from them, good price, fast delivery, recommended. 

    Shame the transparent cover is not sold on its own, between me and the twits who move the bike in the bike park by hanging onto the rear blinkers, we use a few.

  • 11-08-2013 09:14 PM In reply to

    Re: The Official Derbi GP1 Thread

    Just thought I"d show what i've been up to today, wilst I had the scooter appart I fitted the other horn from the other scooter and WOW its HEAPS louder!

    Next is the park light mod, this one is gonna look awesome!

    Derbi GP1 250i a properly fun scooter. Now totally renewed, rebuilt, run in, run Hard and now sold.
    Its name...The Flamenco Dancer by SOLD

    Now on a brilliant Yellow Suzuki SV650 NUDIST crumbs it don't half shift!

    Oh

    And remember boys and girls,

    Stock is BEST!
    Filed under:
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