Noisy valves/Shifting RPM - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 11 (permalink) Old 05-24-2019, 01:47 PM Thread Starter
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Noisy valves/Shifting RPM

I have had my 05 Gen I for about 2k miles. I find that if I continually shift around 3-4k RPM and cruise at 3k RPM the valves get noisy. I just went for a long "sporty" ride and kept the rpm's up when cruising 4K rpm and shifting. Shifting around 5-6k RPM. All of the valve noise is gone.
Does this make sense or am I crazy?
Thanks
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post #2 of 11 (permalink) Old 05-24-2019, 01:53 PM
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This is one of the reasons I wear hearing protection. When I don't I am constantly bothered by how loud the front tire, engine, transmission, drive shaft and squeaky plastics are.
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post #3 of 11 (permalink) Old 05-24-2019, 04:11 PM
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I've been riding with earplugs for years, but when on a very rare occasion I ride without them it always seems that the bike is broken or about to explode

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post #4 of 11 (permalink) Old 05-24-2019, 06:21 PM
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Considering how older FJRs had cam chain tensioner problems and a superseded P/N for the tensioner, I would explore that territory.

Noise from valve lash will not come and go with RPM. But a loose cam chain just might.

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post #5 of 11 (permalink) Old 05-24-2019, 10:08 PM
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If that is truly cam chain noise, shut that thing down immediately and don't run it. Your next task is replace the CCT. IF your CCT does not have a paint dot on it, do not run the bike, get a new CCT ASAP.

If it is truly valve train noise (cam chain rattling particularly right side of the engine), you've been playing Russian Roulette and lucky you haven't grenaded your engine.

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post #6 of 11 (permalink) Old 05-25-2019, 06:12 AM
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How many miles are on the odometer, I replaced my cam chain at 163,000km and the old one had worn by 8mm, if you'res is making a lot of noise it's time to change it.
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post #7 of 11 (permalink) Old 05-25-2019, 01:52 PM
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Like Rayzerman said - "If that is truly cam chain noise, shut that thing down immediately and don't run it. Your next task is replace the CCT. IF your CCT does not have a paint dot on it, do not run the bike, get a new CCT ASAP.

If it is truly valve train noise (cam chain rattling particularly right side of the engine), you've been playing Russian Roulette and lucky you haven't grenaded your engine."

I experienced a catastrophic engine failure in late March. Cam chain tensioner failed. Had to replace the engine. You DON'T want to go through that. Look for that blue paint dot on the CCT.

Greg

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post #8 of 11 (permalink) Old 05-25-2019, 03:37 PM
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Generally there are only two noises, engine hum and wind, any thing else probably needs investigating.

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post #9 of 11 (permalink) Old 05-31-2019, 11:11 AM Thread Starter
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Turned out to be Fule Injector. Whew!
Thanks for all of the input.
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post #10 of 11 (permalink) Old 05-31-2019, 12:33 PM
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Quote:
Originally Posted by jgerlach View Post
Turned out to be Fule Injector. Whew!
Thanks for all of the input.

Gen1 '05 owner here. I came to the same conclusion recently.

Checked my valves at 48K and adjusted two (both tight).
Just checked them again at 73K last wkend and I was SURE I was going to find some loose... but nope, all good.
Reason was I had been hearing some ticking at low to mid Revs on occasion.
Upgraded CCT installed a few yrs ago as well so I've concluded that it's likely the injectors so I won't worry about it moving forward.
Regards,
Mr. BR
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