How do you adjust a timing chain on a 3 wheel Honda 200 ATV?

you need a repair manual so you can identify the timing marks so you dont put it together with the timing off 180.you have to turn the engine over and take the masterlink off the chain then you can remove the head and check the valves and guides and replace the chain.before you attempt this you should do a compression test to see how the rings hold up for compression and for valve leakage.