Dyno went south

[Shmoo]

Guys,
Lemme ask you this: Previously, I had a stock bike, with the exception of bolt ons, PC3r. Dyno'd in at 163hp. Recently, I've installed a FULL SYSTEM HMF dual high mount. Removed the pair valve, put on the emissions block off plates at manifold, new K&N air filter, and have zip-tied my flapper valve open. Now, I've Dyno'd in at 159.7 hp. What's the deal!! First, I thought the HMF's were supposed to give me more ponies. But now, I've done all that, and get a lesser Dyno???
Can somebody guide me a little bit, and also recommend a good map for my HMF setup.
Thanks!!!

 

[SierraFlyer]

You don't mention adjusting the PC at all after the changes? Without a remap (or some slight tweaking of the manual buttons) you will run very lean with a full HMF and a K&N filter. You need more fuel for all that extra air. It is not surprizing the HP went down. But don't worry - It will go way up when you enrich the mixture to the correct ratio.

 

[Shmoo]

Yea, Sorry...
I had done re-mapping done for each time. It was supposed to be running "optimally" for these...

 

[blas32]

It is all because of the piece of poop tank the dude screwed you with. I would think when you get your new tank and John cleans your throttlebodies and everything else that the corrosion caused you should have 170 hp.

 

[Shmoo]

Got the new tank put on, cleaned the bike out. Now it's time for me to clean the slower bikes off the road. Rock on baby...

 

[Johnnycheese]

same dyno???
also post the AF and grapfh