To all 2006 KLX250s I have the carb ready to go but I have a question on the float Bowl O-ring. I noticed a sealant “small amount” surrounding the O-ring. The sealant was applied in the valley then the O-ring was put on top. No sealant is on the top of the O-ring itself. I am buying a new O-ring and wonder what this sealant is? Is it necessary? The sealant must be fuel proof “Hylomar” or similar. Curious, any comments.