Wednesday 7 April 2021

QR50 - engine top end

One of the things that was apparent from the beginning that the piston needed replacement, as there was a large crack in the skirt. I measured up the bore and determined that the bike was still on the standard bore, and bought a new piston assembly from ebay - new rings, circlips, piston and pin:


Fitting wire circlips is always a bit traumatic. I did lose this one, found it again, and fitted it successfully the second time:


I resprayed the barrel with B&Q barbeque paint, as I used on the exhaust. We'll see how that turns out!


The original head had a lot of fins missing. This one came from eBay:



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