As you will see from my previous posts I am slowly getting to know my 610 by taking it apart and giving it a once over. Started by removing engine and gearbox oil for a change, removing carb for a clean and aim to check valve clearances in the next couple of days. Add to that new spark plug and I should have a pretty good bike which starts on the button! Questions I have after this stage are; Do i need to remove cooling system? I can't see how anyone can get to exhaust valve cover at front because of all the pipes! Is it worth me checking the auto decompression system whilst bike is in bits! Someone said the springs can go which make starting tricky?? May not refer to my model of bike though thanks as always for input
I'd like to know this as well since my 2003 610 is going to be very similar to your 99 and checking the valves is something that's on my to-do list. FWIW, removing the cooling system isn't too bad (if it's needed)
