80MPH. I can easly cruise 70MPH all day long.
Sorry for the delay. They do use the stock O2 sensor and EFI systems.
I will go double check today, but I think the rev-limiter kicks in at 5K on a stock 2010 C5 and its only pulling 77 MPH on a dyno
I'm pretty sure the Enfield speedos only measure how fast it FEELS like you are going. Nifty tech.
(I have since fabbed up a 750cc+ intake tube between the filter & TB, after reading Ace's comments on intake plenums in another thread.)
I check my speedo against my GPS whenever I have a chance. At lower speeds (under 50), it's off by a solid 5 mph, but at higher speeds (over 60) it's only off by 2-3 mph dependably. I cruise at 80 on the eway all the time and can exceed that speed without coming anywhere near the rev limiter. The highest indicated that I've ever hit was 90 mph, and I believe it was within that 2-3 mph diff. My bikes a slightly modified 2011 C5 (complete Hitchcock exhaust, K&N cone, 19T, and at least a 50# diet of missing steel).(I have since fabbed up a 750cc+ intake tube between the filter & TB, after reading Ace's comments on intake plenums in another thread.)
Do you have a pic of the TB tube?
It's rather like trying to take a deep breath from a hose connected to a 50 gallon oil drum vs trying to take the same breath from a similar hose connected to a 2 liter Coke bottle with a small hole in the bottom.