Do you have to replace cam bearings when replacing cam Harley?

Registered. Yes, by all means change the inner cam bearings and the outer ones too.

What does a cam do for a Harley-Davidson?

By installing a cam upgrade on your Harley, you can increase horsepower or torque by essentially changing your valve timing. You’ll be letting the exhaust out and fuel/air in at very specific times. By changing this timing, you can increase maximum torque in different ranges, such as low or high.

How many hours for M8 cam install?

There is about 20 to 30 minutes of wasted time waiting for the lifters to bleed down on either engine. that time can be used replacing the exhaust and generally cleaning up. Bottom line about 5 hours for me to do a Twin Cam Gear drive conversion. The M8 should take a little less time in my opinion.

How long do Harley cam tensioners last?

I don’t object to spending the extra money on any of the cam design upgrade options (hydraulic, gear drive, etc), but the truth is, you can leave the existing design in place, replace the tensioners with new ones and expect to get another 40K-50K miles out of them. For most people that’s 5-10 years of service.

Why is Twin cam better?

Since DOHC or twin-cam engines have improved airflow through the cylinders, they are often comparatively more powerful and offer better acceleration. They can also improve efficiency, which translates to money saved at the gas pump. In addition, DOHC engines generally run quieter and more smoothly.

Do cams make bike louder?

Bigger cams means more power which means more noise. Sure you can plug it up and quiet it down but then you defeat the cams. To quiet it down and still get the advantages of you’re cams is probably not going to be accomplised with just slip ons.

How tight should pushrods be?

Bring pushrods to Zero lash, no up and down movement, tight against rocker arm, and tight against tappet/lifter.