[SLESTAK75]

Next up is the cam. All performance cams have more lift and duration than the stock cam so any that you choose will render better performance. The most common range of cams is A8 to A12. The lower numbers (A7,8,9) have higher lift and have the greatest gain in the higher rpm range. The highest number (A12) has less lift and more duration giving the greatest gain in the low to mid rpm range. The numbers in between shift from lift to duration accordingly. Its hard to find actual data on each one of these cams. For trail riding most will say the A12 is the best choice. If you want a high rpm drag racer go for an A8 or A9. It is recommended that if you decide on the high lift cams you make sure you install high rpm rated valve springs to avoid valve float. Many an engine has been destroyed by overlooking this. This is not meant to start a debate or offer a hard and fast absolute as to what a person should choose. Tailor your cam to your needs. Be aware that changes to the cam will require even more adjustment to carb jets. Here are some links to charts that show lift and duration for each cam A8-A15. It seems that 12-14 are ideal for these buggies.

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