Materials List for S1 header swap:
S1 Header - 5VX-14602-00-00, EXHAUST PIPE COMP. $50
O2 Bung M18 - 1.5, Vibrant Performance, VIB 1194A $6
SS Mid Pipe, 1.75" OD x .065" Wall x 12" Length, $6
S1/S2 CAT - needed the ends, $0
Header, rear mount from S1 chassis:
- 90109-082A1-00; BOLT
- 90201-086P8-00; WASHER, PLATE
- 5VX-21446-10-00; STAY, MUFFLER
- 4XV-27424-00-00; DAMPER, MUFFLER
- 90387-082W9-00; COLLAR
1 X 6, Deschutes Black Butte Porter :thumbup:
Work: lift tank, disconnect O2 sensor, drop S2 exhaust and mid-pipe, drop pan, weld pan from inside. File pan flat, spray a patch of high temp black on the area removed. Clean pan, block, mating surfaces and install. Tq in criss cross pattern making a couple of passes. While header is off, weld in SS bung unless you're going get a tune. Install header and begin fitment of mid pipe.
Weld up sunken section at back of pan here:
View attachment 55956
PS - I left the 2bro slip ons in place without moving them but I did loosen the mid-pipe top mount at the frame.
Using an exhaust pipe cutter, chop out bulge. Hint: After market parts tend not to use the quality of connectors between the pipes that Yamaha had on there. Thus they can induce vibrations if not aligned perfectly. Its why I sacrificed parts to make the delete section.
Fit the remaining ends to bike. Take a measurement and fit a section of SS pipe in the middle. Index and remove for welding (if you don't have the equipment needed). Otherwise disconnect battery and tack in place.
View attachment 55953 View attachment 55954 View attachment 55955
As mentioned above, you could swap pans to an early pan and then its just nuts and bolts. That said, I now have a spare S1 pan if someone needs one. Vanity side of me said its difficult to match OEM powder coat black so I opted to weld up a quarter sized area filling in the hole in the S2 pan.
S1 pan PN: 1B3-13417-00-00; COVER, STRAINER. Got it on fleebay just in case things didn't go well in the form, fit, function, arena.
Side note: nothing was found in my pan which I was delighted to observe! Also, Amsoil 10W-40 motorcycle oil does not clean and dissolve with lacquer thinner. It won't touch it. MAF sensor is the ticket. Point: it resists solvents pretty well!
It feels like the ECM has adapted to the changes; also a Volt meter to O2 sensor indicates its copping, but I fear this may be more than the engineers had in mind. So she's going to get a fuel controller as I don't want it to run lean. That's it for now.
EDIT: ATTACHMENTS ARE GONE - Basic concept is here...
Wide Band O2 Sensor for Z-AFM:
Conflict: