Display MoreThere is no issue here with his machine. He would notice this lack of power in other gears if something was really wrong.
5th gear in the Slingshot is really long. 184mph on the dyno in 5th gear.
Read some really old stuff here if you want - Info - Click if you want to be linked This also will clear up anyone bragging about going over 140mph in 4th gear. It isn't possible silly people.
Depending on your weather conditions and altitude, 5th gear can be a compete dud under 80mph. As you increase speed, lets say 100, you are higher in the revs where there is more usable power and the machine has better response/acceleration.
When you smash the pedal in 5th, you are making the vehicle run richer than what it would like to see at that RPM and speed. When you give a small amount of gas, AFR mixture are better, and performance is somewhat better.
This also speaks volume about the mefiBob NA tune. The drive-ability is much better with his tune (free flowing exhaust helps too) and 4th and 5th gear are much more enjoyable as noted above by a different member.
I did not have any problems before Bob's tune running above 100 mph or setting the cruise at 100