i have a 76 kh400that i got jet kits for made bykeyster in japan.it say it`s for my bike but has richer 85 mains 22.5 pilots like the s3.i have k&n air filter with no air box stock pipes .should i use this over the stock sizes for better perfomance .also any suggestions over more aggressive front brake pads that don`t squeal. thanks tony .