I use YAMAHA silicone and LUBE-ZALL by Yamaha!!! ( I DO NOT USE YAMALUBE). I want to write the article about installing a PLASTIC TEE in your fuel line and using the tee to SUCK AUTOMATIC TRANSMISSION FLUID throughout your fuel system and into your carbs and into your MOTOR until the trans fluid CHOKES your motor out,,,, but,,,,I'm too tired to spend an hour on this damn puter and write about it!!! All I can say is "it works fine and you NEVER have to take your powervalves apart to clean them anymore!!! The TRANS FLUID will clean the powervalves and the carbs LIKE NEW!!! COMBUSTION CHAMBERS, EXHAUST PORTS,,,, EVERYTHING!!!!