Question about Gilera Runner VX 125 Motorcycles

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Hi, I brought a Gilera SP Runner 50cc, second hand the day after whilst on a test drive it cut out and wouldn't start, i've replaced the bearings and also the head gasket. The scooter starts up fine now and sounds ok however it has no power when accelerating. Any ideas

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Hi,the problem which you are facing has only 2 (two) reasons-
first,that the pistion rings are torn out and because of which the pressure is not building in the cylinder.for this change all the 3 rings as they come in a set of 3.

secondaly the valves of the engine are wotking properly or broken.
for this you need to change the valves of the engine.

I would recommend you to ask the mechanic to check the timing chain as this chain roates the valtes through a cam drive,and if the chain has problem then the opening and closing of valves would not be on time.So,its an very critical part of any engine.

do these things and your problem will be solved

cheers

Posted on Jul 23, 2009

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Posted on Jan 02, 2017

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