Yes! I was there. It is indeed amazing.
​​​​​​3 days of 100% chilling and riding with great people!

 

Did you just buy this bike... I would start with a carb rebuild and see what jets are actually in it. At 45 mph you shouldn't loose that much power if the Jets we're off a little because of a velocity stack. Yes it would most likely run lean but should not be a big power breaker...

 

The jets are 45 and 185

 

If your motor is stock then I would think those jets should suffice.. Take a close look at your needle diaphragm.. might not be opening all the way , possibley torn or not installed properly.. .. I would also check the intake manifold seals..

 

I did, needle diaphragm was OK.
I didn't check the intake manifold seals. Could this be checked with break cleaner.? I've read somewhere that if there is a leak, the engine would Rev up.

 

You can use break clean but do it out side cause the exhaust will get worse and it should definitely affect the idle..

 

Just my .02 but if he went from an air cleaner to a velocity stack that increases airflow thus he would need to increase fuel. On one of my bikes I went from a stock air cleaner to a K&N and lost a ton of power at higher rpm. Adding fuel solved the problem.

I don't have an Evo but on my 03 FXDWG (which I think has a similar carb) I was able to change the main jet easily without removing the carb. As others have mentioned adding a shim or two under the needle may be necessary.

Good luck.