JUST 1 J39 REACTOR BASE SIZE:S Works great with applications that

Works great with applications that have dual filament turn signals

Designed to withstand the rigours of competitive motocross racing environments

This high-output battery kit includes a precise acid pack for activation

gearbox and primary chain case for which SAE 20W-50 engine oil is specified

Includes all necessary hardware for a straightforward bolt-on installation into the rear axle

JUST 1 J39 REACTOR BASE SIZE:S Works great with applications thatThe JUST 1 J39 Reactor Base from JUST 1 is a high quality base plate designed for use with the J39 helmet model. This base plate provides a secure and stable fit, and is made from durable materials. It is easy to install and is a great accessory for any motorcycle rider. Compatible with J39 helmet model Secure and stable fit Durable materials Easy to install Enhances overall riding experience