Exup valve noise

Every now and then i can hear my EXUP valve making a squiky noise as soon as i switched on the bike. What is the best way to go about it. And what type of lube are you suppose to use. Any help from u okes?

First, I'd look in the Service Manual or go to the parts catalogues on www.yamaha-motor.com (http://www.yamaha-motor.com/) to see how the EXUP valve is put together. It's a simple thing, with an electric servo motor controlled by the bike's ECU that works a pair of cables that turn the valve down in the header pipe. The valve basically rotates as RPMs increase to gradually expose more and more area for exhaust pressure to move through. Google "Yamaha EXUP" if you want to read about the operational theory. I've done this kind of job many times, and do it once a year, myself. Your noise is probably coming from the dry and squeaky plain bearings the valve rides on. You simply need to remove the valve, clean it up (without removing any metal from it, especially the ends where it rides in the header pipe) coat the ends with a film of hi-temp grease (I like to use Bel-Ray assembly lube) and put it back together. I also shoot some thin spray lube oil (like Bel-Ray 6-in-1, Honda Multi-Purpose Lube, WD-40, etc.) through both cables. Do not use something thick and sticky like chain lube. When putting it back together, the last critical step is to properly adjust the cables so that the valve will be in the right spot at the right time, and this is where the Service Manual is worth it. Briefly, after switching the bike's ignition switch on for a few seconds and then turning it off, the little fork on the left-hand end of the valve should be aligned with the little hole on the valve housing, in fact allowing you to stick a small locating pin through the fork and into the hole while adjusting the cable slack.

Thanks a lot YZEtc . I will check it out and then attempt the work. I do not like a dry EXUP as i had problems with that on my FZR some time back.

First, I'd look in the Service Manual or go to the parts catalogues on www.yamaha-motor.com (http://www.yamaha-motor.com/) to see how the EXUP valve is put together. It's a simple thing, with an electric servo motor controlled by the bike's ECU that works a pair of cables that turn the valve down in the header pipe. The valve basically rotates as RPMs increase to gradually expose more and more area for exhaust pressure to move through. Google "Yamaha EXUP" if you want to read about the operational theory. I've done this kind of job many times, and do it once a year, myself. Your noise is probably coming from the dry and squeaky plain bearings the valve rides on. You simply need to remove the valve, clean it up (without removing any metal from it, especially the ends where it rides in the header pipe) coat the ends with a film of hi-temp grease (I like to use Bel-Ray assembly lube) and put it back together. I also shoot some thin spray lube oil (like Bel-Ray 6-in-1, Honda Multi-Purpose Lube, WD-40, etc.) through both cables. Do not use something thick and sticky like chain lube. When putting it back together, the last critical step is to properly adjust the cables so that the valve will be in the right spot at the right time, and this is where the Service Manual is worth it. Briefly, after switching the bike's ignition switch on for a few seconds and then turning it off, the little fork on the left-hand end of the valve should be aligned with the little hole on the valve housing, in fact allowing you to stick a small locating pin through the fork and into the hole while adjusting the cable slack. yeh! simple! hahahah (that awsome insrtuctions YZEtc! your good!) impressive!

Can anyone tell me what page or paragraph is the EXUP valve adjustment on the service manual....? BTW I got the 2006 service manual for anyone who needs it

Heres a page that tells you exactly how to do it, enjoy... http://www.sites4bikes.com/R1-EXUP-98-01-Adjustment.htm