As the R1 rebuild continues, I’m now working on the EXUP exhaust assembly as a few services ago, I was told that one of the cables was fraying.
Removing the unit was a bugger, what with the rusted bolts and road grime.
I found the cables rusting (the bike has not been run for 8 months).
Should I use lube when putting the new ones in as Yamaha don’t state that as necessary in their EXUP service procedure?
Would copper grease be good enough if I do?
And when I removed the assembly, these ceramic material things fell out. I was possibly being a little mechanically unsympathetic by using too much force (as I was being pelted with hail stones at the time and wanted to get in).
I would definitely lube it - the fact that Yamaha don’t specify this as part of the service routine seems to be a bit of an anomaly - as most people that use exup yams in crap/wet weather experience the exup seizing.I’ve got an old Ace - and although the exup seems to be working fine I’m gonna lube it at the first available oppo - Yam dealers recommended exup juice - but I couldn’t track any down (and nor could they) - whatever grease you use has to be capable of withstanding very high temps - so people recommend the kind of grease they use for assembling turbos - I got recommended this on a Yam forum:
A lot of people shy away from using copper grease - some say it’s gritty and can wear the cables (don;t know how true that is) and that it doesn’t last very long anyway due to the high temps.
Try getting a hydraulic cable oiler to oil the cables, ordinary engine oil would be ok for this, but oil them regularly. This could also be used on all cables. should help to stop the cable fraying.
Because the exup valve sits right in the exhaust you need really high temp grease - e.g. stuff used for assembling turbos - anything else will just burn off. That’s what I’ve read/heard anyway - I’m gonna use high temp stuff when I do mine.
Hi there. I’m not a regular poster around here but do read through from time to time. I’m posting now because I’ve just got myself an FZ1 and it’s my first Yamaha with an EXUP valve and I’m not too sure how it all works. I started the bike yesterday and felt a blow on my foot under the exhaust. I looked at it and realised that the blow was coming from the place where the EXUP valve is installed. Is this normal? Are there any explanations of how this works out there that anyone knows of?
One last question, in the light of this thread, is there anything I should be doing to take care of this valve as care and maintenance?
I would definitely lube it - the fact that Yamaha don’t specify this as part of the service routine seems to be a bit of an anomaly - as most people that use exup yams in crap/wet weather experience the exup seizing. I’ve got an old Ace - and although the exup seems to be working fine I’m gonna lube it at the first available oppo - Yam dealers recommended exup juice - but I couldn’t track any down (and nor could they) - whatever grease you use has to be capable of withstanding very high temps - so people recommend the kind of grease they use for assembling turbos - I got recommended this on a Yam forum:
A lot of people shy away from using copper grease - some say it’s gritty and can wear the cables (don;t know how true that is) and that it doesn’t last very long anyway due to the high temps.
Just copied my reply to Afro RE Exup valve maintenance - not specified in the service schedule by Yamaha but worth lubing with hi-temp grease regularly to keep it moving or it may seize - particulalry if it used in crap weather.
Regarding your exhaust - I guess it could be blowing due to a hole or loose fitting.
Check if it still has the exup fitted - some people take them out.
Thanks Sid. I’ve just been out to have another (proper!) look and I’ve found that the source of the blow is a small hole on the underside of the can very close to where it joins the pipe just after the EXUP (which is fine, not loose and still there). The thing is the hole looks like it’s meant to be there, it’s too perfect to have been caused by damage (the bike isn’t even a year old and it has been very well looked after). Would you know if that’s normal?
the holes should be there,they drain water out of the exhaust which build up through condension:D.u should put copper grease on the cables and the valve itself when u put it back together.these should be stripped and lube every 16000 miles if my brain serves me right:)
