Hey guys, recently i've lost a lot of compression on my bike and it's getting really hard to start using the decompression lever. I Can't find that sweet spot anymore at all. I've checked the valve clearances and they're in spec as well as the decompression mechanism, which is fine. My riding buddy reckons that I probably have a leaky valve guide somewhere and an email from Rick Sieman confirmed this. So onto my question, How hard is it to replace the guides? A quick look in the manual and it seems like it is above my mechanical skill so i'll probably take it into the shop. How much is involved? Can I replace the leaking one only or do I have to replace all 5, is it possable to repair them? Do I need new valves to wear into the new guides or what? As you can see I have alot of questions so all information about this is appreciated.