Rear shocks are definitely the biggest weak point on the Monkey. I've replaced mine with a £99 pair off eBay which whilst not state of the art are a lot stiffer than oem! I've fitted a Tyga full exhaust which removes the convoluted pipe work and cat without being too loud. The 2nd weakest thing is the chain. But at less than 30 quid for a chain and sprocket kit I can live with that. Fitted a 14 tooth front sprocket which makes a noticeable difference in acceleration and ride ability without seemingly compromising top speed. Still brings a smile to my face every time I ride it