buckride

have a quick question about noise coming from engine when started.kind of a clacking noise. persistent when cold then slowly quits when warmed. plus its very doggey of the line what should i do? thanks

IRONDOG

Sounds like excessive piston to cylinder wall clearance in the engine. What is it, a 377 or a 503?
When the piston warms from the heat of combustion it gradually expands, and the noise goes away. How many miles on the engine and do you know it's full history? If it has Wiseco pistons it will tend to be noisy until warmed up.
As far as being doggy off the line, it could be as simple as a worn drive belt, improper belt deflection, or as complicated as a worn out clutch or engine. So many variables and we can't see it clearly from here. Post more details on the miles and condition, we will try to help you.
Jerry
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Rod726

simply just let it warm up for awhile

upersleder

irondog is right, piston slap. but if you let it get too bad you can end up breaking off a skirt and destroying the engine. i recommend new pistons/rings soon.

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buckride

cat owned by older couple. 2200 miles on odometer. well maintained.did compression on yesterday 130 and 110. did tune up-plugs, chaincase, new fuel. ran great for about a couple of weeks of riding(just out in our field)then the clacking noise began.again thanks for any help

buckride

its the 380

IRONDOG

That 110 compression reading raises a flag- it warrants tearing down the top end for a look-see. I think you will find something that needs replacing.

Jerry
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