Hi.Anyone try these in a Polaris xlt snowmobile? How'd they work?

BR9ES plugs are one step cooler than 8's, which means that the rate at which they dissipate heat is greater by a predetermined factor as engineered by NGK. If Polaris calls for BR8ES', stick to it. Any NGK V-Power plug will perform with excellence in whatever you install it, particularly 4 cylinder and smaller engines. If the reason you are asking this question is because your XLT is constantly fouling plugs, then the problem is likely either a fuel delivery or oil injection issue, and changing spark plug brands or heat range won't fix it. Hope this helps.

Is this good for a 1997 yz80?

No. Completely different application. Different dimensions and heat range. Both very important factors. Definitely stick to the NGK brand tho. Nothing better!

ASIN	B0000AXR7C
Batteries	1 A batteries required.
Best Sellers Rank	#31,492 in Automotive ( See Top 100 in Automotive ) #190 in Automotive Performance Spark Plugs
Brand	NGK
Construction	Resistor
Customer Reviews	4.5 4.5 out of 5 stars (3,762)
Date First Available	7 August 2012
Exterior	Painted
Item Weight	55 g
Item model number	130-086
Manufacturer	NGK Spark Plugs
Manufacturer Part Number	5722
Model	130-086
OEM Part Number	HONDA%9807959816, HONDA%9807959847, HONDA%9807959876, PIAGGIO%AP8206915, PORSCHE%99917001490
Position	Unknown
Product Dimensions	8.71 x 2.49 x 2.26 cm; 55 g

NGK Spark Plug, NGK BR9ES, ea, 1

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