2018 XC300 Rear Master Cylinder Parts - Solved
 

I hope no one else is as unlucky as I was in losing my rear master cylinder cap and diaphragm! Unfortunately GasGas / Reiju only sells the complete rear master cylinder assembly, ie no parts available seoerately. Luckily the parts from a 2016 YZ 250 fit perfect! I think there are other years & models that will fit, however I know for certain these will.
Note: Cap is an AS3 replacement for this 18 XC300.

http://www.gasgasrider.org/forum/att...1&d=1589473413

http://www.gasgasrider.org/forum/att...1&d=1589473435

Thanks for sharing.

I would guess that the YZ cap would fit too?

I was actually curious about that myself. The short answer is yes it will. It is just a hair bit different in shape. I actually sent an email to ASV asking about that because their part numbers were different. (This was back when I was trying to figure out what YZ parts would work, since the parts were not available separately from gasgas, and they didn?t even have the whole assembly in stock.)