Made the cam mod. I did just the intake side. The difference is noticable. Bike intake sound is different and it pulls really good. The mod is kinda tricky to make as you easily get confused during the change and loose your situational awareness. If you want to do the mod, just search for marcelino cam mod. Some people do it for the exhaust side. Some for both sides. The problem with the exhaust side is the automatic decompressor automatic that needs to be reset. So doing the intak only is simpler and seems to give nice power even without the exhaust side.