15. If you are running a solid lifter valvetrain in your engine, checking the lash on a regular schedule is a must. Many racers depend on their engine builder to do it for them, but that puts you on their schedule. Tasking a crew member with learning how to do it properly can save you lots of headaches. Normally, a quality engine builder will be more than happy to help their customers learn because that’s one less task off their plate, but if you don’t have that option all you have to do is make a quick search for “set valve lash” on www.circletrack.com.