Stage 1 download needed
#1
#2
#3
![Default](https://www.hdforums.com/forum/images/icons/icon1.gif)
The air flow rate will be based on your most restrictive part. Think of blowing up a balloon with your mouth vs. blowing it up through a straw. In your case the exhaust is the most restrictive part. The reason for the stage 1 download is because a increased airflow will cause the engine to run too lean. The stage 1 download compensates for that. If you don't upgrade your exhaust the stage 1 download will make the bike run too rich. Hold off on the Stage 1 download and/or tuners until both your air cleaner and exhaust are high flow.
Thread
Thread Starter
Forum
Replies
Last Post