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skatefreak |
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skatefreak World Chat Champion
Joined: 06 Feb 2010 Karma :
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Posted: 12:19 - 16 Jul 2018 Post subject: 1999 R1 Noisy > 6k rpm? |
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Afternoon all.
So 1999 R1, 25k, had it a year or so, it was a little noisy above 6k so replaced the CCT last year (made no noticeable difference).
Either it's getting progressively louder or I'm just getting more paranoid.
It still sounds fantastically smooth below 6k but when going over or giving it some welly it gets a horrid tappy noise...
A little juddery when giving it gas at very low RPM (1.5k or so) and I have read this is fairly normal (aftermarket slipon)? Clutch slips a little when giving it all the berries, not bothered me much as I don't really go there on public roads and now have a track bike for mucking about
Still pulls spectacularly and performs great
Any thoughts welcome its really putting me off riding it |
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Fizzer Thou |
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Fizzer Thou World Chat Champion
Joined: 06 Aug 2011 Karma :
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Posted: 21:00 - 16 Jul 2018 Post subject: |
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There are a number of things that you can check without expenditure.
Firstly,remove the chrome cover over the Exup valve and ensure that when you manually open the valve with the ignition off,that when switched on,that the pulley resets back to its detent position ie. that the 'U' shaped part stops over the hole in the backplate.
Then I would be checking to make sure that the carb diaphragms are all seated correctly and that not one of them has any splits in the rubber.
How old do the spark plugs look?Are they anything special like NGK Iridium?
What is the state of the air filter?I replaced my one with a pattern one from Wemoto and is easily cleaned with compressed air.
Once everything has been done,then check the carb balance with some vacuum gauges.
Have a look at www.yamahar.co.uk and also the early R1 pages on f/b ____________________ Just talk bikes.What else is there?
Always have a 'Plan B' |
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Kawasaki Jimbo |
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Kawasaki Jimbo World Chat Champion
Joined: 09 Oct 2015 Karma :
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stevo as b4 |
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stevo as b4 World Chat Champion
Joined: 17 Jul 2003 Karma :
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skatefreak |
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skatefreak World Chat Champion
Joined: 06 Feb 2010 Karma :
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Fizzer Thou |
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Fizzer Thou World Chat Champion
Joined: 06 Aug 2011 Karma :
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Posted: 12:17 - 17 Jul 2018 Post subject: |
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On my 5JJ R1 I checked the valve clearances at 18k and only one or two shims actually needed adjusting.
If you are not sure when the clearances were last checked it is a good idea to get them done,if only for your own piece of mind.Keep a record of what the measurements are for future reference ____________________ Just talk bikes.What else is there?
Always have a 'Plan B' |
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Old Thread Alert!
The last post was made 5 years, 287 days ago. Instead of replying here, would creating a new thread be more useful? |
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