Outside diameter of stock 04-07 1000rr exhaust pipe behind stock muffler???

So, I've decided to put a 14 tooth front sproket on my bike...and move the rear tire as far back as I can. This will compensate for my weaker bottom end due to open exhaust AFTER the EGCV. Should feel like a swift kick in the ass...at all speeds. Then add Speedohealer to make it all good.

Top end will only be 163mph...but truth is I run out of road back home by the time I get to 151mph. I weigh 244lbs...think the open exhaust paired with 14 tooth front, 42 tooth rear and tire moved as far back as possible will give it the drag bike qualities I appreciate while also being quick in the turns for what it is.

Total cost $150...for both front sprocket and speedohealer? Only other mod to consider would be a .018 inch head gasket to bump the compression up to 12.7. The open exhaust could really use the extra compression at lower rpms....every where for that matter. Think i'll wait till the cams need shimming to go through the expense/agony of replacing the head gasket.

Still should pull 72mph in first gear.

Any input?

Stu

stu_the_chess_guru said:

You guys got the good will to walk outside and measure the outside diameter of the pipe running between the stock muffler and the EGCV? I just cut mine between the muffler and the EGCV. In short...the EGCV is still in place...figure it can only help...not hurt.

Lossed a little down low...picked up a little up top. MUCH louder...in case anyone had wanted to do it.

Thing is when i parked it at the airport i could tell the hot exhaust was melting the plastic underneath the seat...I need to install an exhaust tip that redirects the flow downward...but I'm now 1500 miles from my bike and need the tip to install when i get back to Texas...in a hurry

Anyone want to do a newb a favor and tell me what size exhaust tip i'd need?

Stu

Click to expand...

Pathetic as it sounds...i'll answer my own question...more or less. Took my bike to a muffler shop...had the gents tack on a 2.5 diameter, 16 inch length of exhaust pipe from two inches behind the EGCV to where the stock location of the exhaust outlet was prior to cutting off the muffler. Of course the pipe is bent and twisted to HIDE it from sight unless you are directly behind the bike (what i wouldn't give for a digital camera right now).

What I've done is removed the muffler, BUT kept the total length of the exhaust system "stock". What have I achieved you ask?! ALL THE BOTTOM END OF A STOCK BIKE...with a nice gain up top

Keeping the pipe stock length and incorporating the EGCV instead of tossing it is a HUGE improvement over a "slip on". Need to develop a slip on that ties in after the EGCV...for best performance.

Is it LOUD? Well, I can't ride it without ear plugs. I'm thinking of cutting the extension off that I just had tacked on...finding a cheap slip on...cutting it to length so i can tack it on behind the EGCV...just to get the noise down a notch. Still waiting on my 14 tooth front sprocket...damn mail is slow

Stu