Sabah strikes me as the adventure capital of SE Asia just as New Zealand is an symbol of sport internationally. Though without the financial resources and oganisation, clearly the region is going to struggle to maintain a good service reputation. Time will tell. For more information on mountain biking in West Malaysia, see the following links:
1. See http://mount-kinabalu-borneo.com/blog/kinabalu-mountain-biking-package-trip-from-busat.html
2. See http://mount-kinabalu-borneo.com/blog/10-ways-to-save-your-money-backpacking-in-kota-kinabalu.html for backpacking in Malaysia
3. See http://mount-kinabalu-borneo.com/blog/how-to-get-to-kinabalu-park-hq-from-kota-kinabalu-using-google-maps.html.