Harleys are not made to run high RPM like sport bikes. Stock rev limit is on my bike 5200. I think the upgrade moves redline up to around 7k.

 

If your motor has stock cams, springs, etc. your powerband is flattening out before the redline, so you need to upshift sooner. Don't just increase your redline if you don't have any other engine mods or you may be needing some major mods.

 

Before my stage 1 download the bike hit the limiter at 5200, now it goes above 6000.

 

Your Harley Red lines around 8000 RPM's so they put Rev limiters so you are not doing damage to the engines They set them lower around 5600 RPM's or so.

 

A stage one download on your bike will raise the limiter, as mentioned before. I've never understood the reasoning behind that.

Cadman, do you seriously think the redline on a Harley push rod engine is 8,000 rpm?

http://auto.howstuffworks.com/harley2.htm

 

Yeah, back before rev limiters, I think the redline on my 1980 Low Rider was around 6500 rpms. 8k is darn near sport bike range.

 

Yes it was in one the harley mags

 

Iused my SERT Pro to bump the rev limit to 6k.

 

The buell have the sporty motors and turn them up to 12000 RPM"s and get top horsepower at 6000 RPM"s. Were most Harley horsepower is lower 3400 RPM's With there red line at 8000 RPM's

 

LOL, sure you weren't reading about a V-rod? They will rev to 9,000.

Here's what a specific writer, Joe Minton, in a specific magazine, American Rider

Conclusion:

"The two most common reasons for engine failure of modified Harley engines are excessive rpm and detonation. A stock Harley Evo or Twin Cam engine, used moderately, can last 100,000 miles or more. Really. The same engine will be destroyed in a few miles if run at 1,000 rpm past its factory redline.

Detonation can destroy an engine so quickly that you won't have time to close the throttle before it hammers the pistons to scrap. I have done this. So keep the revs within the limits of the engine, which is about 6,000 rpm for a Big Twin and 7,200 for a Sportster.

If you detect any signs of detonation you must correct the problem immediately. Detonation, even a mild case, is going to destroy your engine and you must do whatever is required if you are to avoid the expense of a major rebuild. "

http://www.americanrider.com/output.cfm?id=1021915


8,000 RPM is two thousand past a Big Twin engine's max redline.