When Cat started using the BR9EYA they talked about it at the race school. The EYA has more surface area on the electrodes due to the grooves, so that reduces the chances of fouling. They also said the EYA is about a 1/2 step hotter than a BR9ES.
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, accessories, and more!