I own a 1978 Yamaha xt-500, and ever since I got it brand new in 78 the thing would never started right away, it would always take 10 to 15 minuets of kicking before it would start. I have been playing around with the thing trying to fix it; and came to the conclusion that it’s the carburetor, if there is any suggestions on what to do to fix the problem it would be nice.