Question about 2011 Derbi GP1 50

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When the engine box is off and i put my hand over the inlet rubber pipe allowing a little bit air through then i put the air filter box on and the engine races, the inlet rubber pipe has a split in it but when the air box is not on engine runs fine, can this be the cause of the racing when put back together.

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Hi, Jan_rober794 most definitely replace the rubber hose or tape the crack for more information about your question and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
Derbi GP1 50 2011
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Posted on Mar 09, 2016


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What is the best way to put the air box on? I tryed putting sleves on first with out box an heated them up but then cannot get air box housing to sit properly

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Paul 'W' U.K.

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