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I am working on a friends bike and here is the issue. I took it out to help diagnose the issue with his 05 LT. As soon as it started to warm up it began making a noise like a sewing machine while under light throttle beginning at 2800 and getting louder until 4200 then it starts to go away. I tested this many times and it is always noisy under a light load but not under heavy accel or decel. Seems like it may be missing occasionally.No noise in neutral but I think I hear 1 clunk when I rev it. I took all of the covers off to do other maintenance including the valves. I ran it up 1st in the shop with some rear brake and could reproduce the noise. I am quite certain that the noise is coming from the front of the engine like possibly a chain slapping. When I took the valve cover off, nothing seems obviously amiss but I need advice from someone who has dug deeper than a valve check.
How much slack should the chain have if the tensioner is working properly? Should I be able to lift it easily or should it be fairly tight? I can lift it up with a screwdriver and it seems kinda loose. It is not so loose that it will jump gears but it is loose none the less.
Is there a way to test the tensioner without taking the front cover off?
Oil is 20-50
19000 miles
How much slack should the chain have if the tensioner is working properly? Should I be able to lift it easily or should it be fairly tight? I can lift it up with a screwdriver and it seems kinda loose. It is not so loose that it will jump gears but it is loose none the less.
Is there a way to test the tensioner without taking the front cover off?
Oil is 20-50
19000 miles