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Post by walleye1963 on May 13, 2015 14:00:21 GMT -5
Hi guys got the tao tao thunder .72china mi.I set the vavls at .003 both before I even started it don't do it until its warm but I keep herding this tic tic tic sounds like a valve .I checked them again yesterday and there both at .003? Almost sounds like a spark nock .? Any idea what it could be .my 150 did the same thing. Or is it just a taotao thing.thanks
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Post by 190mech on May 13, 2015 14:09:55 GMT -5
Possibly cam chain clatter?
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Post by walleye1963 on May 13, 2015 14:56:12 GMT -5
Even tho its new?
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Post by scooterpimp on May 13, 2015 18:04:12 GMT -5
Seems like all of my 4t qmbs had a tick after thier hot , more evedent with bbk. Some with 150 miles to 3500 miles.
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Post by Silar on May 15, 2015 13:23:38 GMT -5
I have the same thing. I even put my valves to .002 for both and that didn't change the sound. Only happens once the bike is warmed up. I saw a video where the tick was being caused by a broken valve spring. Got mine parked until hopefully this evening I can pull the head and check to see if a valve spring is broke, or if the valve is tapping against the piston somehow.
Of course I am running a 50mm BBK with A9 cam so not stock at all...
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Post by Fox on May 15, 2015 14:15:26 GMT -5
Have you discarded the factory oil and put some good quality oil in it yet? I know everyone says do it at 300 mi. but 50-100 is plenty of initial break-in with that cheap crap in there. You can do it again at 300.
Oil gets thinner when it gets hot and that factory crap is no good to begin with but the tapping getting more pronounced when the engine gets hot is normal and nothing to get worried about. You are listening for it so you are letting it go to your head. No tapping is worse than tapping cause it means tight valve(s). Better to err on the sloppy side than too tight.
Next time you check the valves put a socket on the head bolts and make sure they are all tight. I can't tell you how many times I have found heads that were barely tightened on by the factory.
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Post by Silar on May 15, 2015 16:35:45 GMT -5
walleye1963, check to see if your spark plug is loose or the threads are cross-threaded. I just pulled my head thinking it was my valves and found out my spark plug was cross-threaded.
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