Is it just my carb? (not happy while cold)

Choke pull off as stated is the first choice, also use a laser digital temp sensor and check the the cross over heat passage going through the intake. It shoud rise as the exhaust manifolds do . Not as much under acceleration but at idle. I have seen these blocked solid and cause cold running problems. Loose timing chain will give cold problems also. this is the first sign of problems with a chain. Good luck hope you find it.