We carry a full assortment of plugs. If you are unsure please call or email us for guidance. Or try your google-foo at NGK'S SITE
BPR7ES or BPR7EIX is the correct plug for use in a Beta X-Trainer and now MY22 300 replacement for GR7CI8
BR8ECMIX is a shorter plug allowing easier access.
SPARK PLUG, LKAR8AI-9 BETA 4T bikes