Quote Originally Posted by HWORRELL View Post
Be best to buy the tuning kit,it has several jets rods and springs. Seems to me they are around $50.
The 'kit' for a 1406 is bare bones. The 'kit' for the 1405 has more choices and, of course, also more expensive. Both will have about every possible option available for the 600cfm carb - but that too gets pricy. Summit also sells the individual pieces if you really want to spend the bucks