What else is needed with 1188 Wiseco piston kit?

[86FJNJ]

Thanks Pat reading through your post now

[Gearbox Paul]

I opened up the carbs to deal with a fuel leaking issue (separate post about this) and had a look at what is in there. 

Main jet is 112.5
Pilot jet is 40
Pilot air jet is 155
Needle is 5FZ74 with circlip on 3rd notch (5 notches total)
Fuel air mixture screws 2 turns out
Air box is original, and air filter is OEM as far as I can tell.
Exhausts are OEM.

Again, the FJ has a 1188 cc overbore kit installed.  Not sure if that's reasonable carb set up with that kit, or if anything raises red flags, but that's what I've got.   

 

[Gearbox Paul]

I opened up the carbs to deal with a fuel leaking issue (separate post about this) and had a look at what is in there. 

Main jet is 112.5
Pilot jet is 40
Pilot air jet is 155
Needle is 5FZ74 with circlip on 3rd notch (5 notches total)
Fuel air mixture screws 2 turns out
Air box is original, and air filter is OEM as far as I can tell.
Exhausts are OEM.

Again, the FJ has a 1188 cc overbore kit installed.  Not sure if that's reasonable carb set up with that kit, or if anything raises red flags, but that's what I've got.
 

[86FJNJ]

The others in the group know a lot more than I do so take my comments with a grain of salt.

Your 1188 CC kit essentially gets you to a 1986 or later FJ1200 and the jetting you have is in line with that. Since you say the bike runs well I'm tempted to say the PO who installed the 1188 kit took the time to dial it in. You don't NEED to do anything but if you want a bit more from the engine add RPM pod air filters, free flowing exhaust and then the carb jetting changes for those changes will wake it up a bit more and it will sound better.

I strongly suggest the RPM pod air filters instead of the stock airbox. Pick any open (no baffle) exhaust that makes you happy. You can find some used slipons on ebay or buy a new Delvic exhaust. I use the HRS needles and springs in my carbs, links below, I have noticed an improvement in performance with these. The needles and springs must be used in conjunction with each other. The needles and springs are common for the FJ1200 carbs, not sure if your bike has the FJ1100 carbs or the FJ1200 carbs. If you have the FJ110 carbs I'm not sure if these needles and springs would work the same or not. Pilot jet size probably ok, but you may need to add some more fuel with the fuel mixture screws or go to 42 pilot and have less worry about a clogged pilot. With those changes you should bump up the main jet size to 115 or larger but that depends on your area. I'm in NJ and use RPM pod filters, straight through exhaust with short slipon mufflers, 42.5 pilots, HSR needles on 3rd clip from top, HSR Dyna Springs, 120 main jets and bike runs great. I think regionally carb settings are different. I received feedback from our FJ brothers on the wests coast and tried their jetting in my bike but even with the same configuration it just didn't work in my bike, my bike needs the big mains. In talking with some others on the east coast of USA their jetting is more in line with mine so while each engine is different I think the region can matter too.

https://rgqbx-sxswu.volusion.store/product-p/carb-spring.htm
https://rgqbx-sxswu.volusion.store/product-p/hsr-needle.htm

[Pat Conlon]

It's not the 1188cc displacement of the Wiseco kit that's the issue, but the design of the Wiseco piston domes.

Carb jetting for a high compression kit @ 13:1 will be different than pistons that are 10:1

So, what's the compression ratio of the Wiseco kit?

[edit] On the Curt Andrew's website I see the 1199 Wiseco's  compression to be 10.25:1 so that's not too high of compression bump to be worried about...considering the stock FJ compression is 9.7:1
https://andrewsmotorsports.mybigcommerce.com/wiseco-piston-kit-yamaha-fj-complete-kit-l1199-ck-ms-motorcycle-series-11148m77521-ck-ms/