Actually you can use good quality emissions hose of the proper diameter from an auto parts store to replace any of those OEM hoses as they wear out or become brittle. Make sure it's emission qualified, because lots of the rubber tubing from auto parts houses are too stiff and get brittle very quickly. Emissions qualified hose must retain its flexibility and integrity for much longer. Slightly more expensive but way more quality. On your cold starting, this isn't too unusual for many owners. Many, like me, have just drilled out the starter jet in the carb to .018"--.020".