1. LIFTER AND CAM LOBE u Lifter face has Convex Shape u Cam Lobe has taper of.0007” to.002” u Lifter must spin to Dissipate Load u Lifter’s convex shape prevents Edge Loading Page 193

2. LIFTER AND CAM LOBE u Cam and Lifters become wear mated in first few minutes u If cam is replaced replace lifters also u Used lifters will rapidly wear out a new cam

3. LIFTER AND CAM LOBE u Lubrication and Break-in u Cam is lubed by crank spray u First 1/2 Hour is Critical u Must use (EP) Extreme Pressure Lubricant

4. LIFTER AND CAM LOBE u Minumum RPM 1500 for 15 Minutes u Some OHV have oil passage in cam u Oil holes on each Lobe, if plugged instant cam failure. u Oil changes are importiant to cam life. Page 194 Figure 8.21

5. CAM LOBE SHAPE u Base circle u Lobe u Opening and Closing Flank u Opening and Closing Ramp Page 194 Figure 8.22

6. CAM LOBE SHAPE u Lift u Duration u Overlap Page 195