Hey 2fst2c


Ok first thing ill ask you to do is measure the gudgeon pin from the same place on the vernier , you will get a different reading depending on where you measure it from on the claw. the new ones should measure 3.99 mm , now looking at yours in the pic if you had premature wear on the gudgeon ends then that can be the cause of the pin popping out. The front of the piston is where the hole is on the gudgeon , or at least that is how they are assembled, the gudgeon having a lip can by chance catch onto the G Clip if it has movement. so that is possibly why that happened. the question is why did it wear prematurely ?

Can you outline your run in procedure exactly how you did it ?

that will give me bit more of an idea ..

Cheers MM