2003 CCT Replacement-done-question - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 6 (permalink) Old 07-19-2019, 01:00 AM Thread Starter
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2003 CCT Replacement-done-question

Hello all,

After reading a bunch of posts about CCT failure, I maybe needlessly replaced the CCT in my 2003 with almost 40k on the clock. Engine wasn't making any weird, unusual, or loud noises, but, well, I did it anyway. Aside from it being a time consuming royal pain in the ass I had no major problems and I got it back together, with no leaks! I have now noticed a humming sound, for lack of a better term, at idle. Sounds like when the cooling fan kicks in, just not quite as loud. Really hard to pin point. Maybe front of engine? Maybe at the rear/mufflers? Can't tell. When I raise the RPM it goes away. Did not hear this sound before the CCT replacement. Maybe it's a co-incidence, and would have happened whether I replaced the CCT or not.

Any thoughts from you more experienced FJR jockeys?

Thanks.

Jay
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post #2 of 6 (permalink) Old 07-19-2019, 07:41 AM
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My opinion, and it's just an opinion, is that there was SOME noise coming from your CCT and you didn't notice it, and it was masking the hum. JMO

If you were SURE this was the original CCT then good on you for replacing it. I will sleep better at night knowing you replaced it even if you don't. LOL

07 FJR 48,000 miles 03 Yamaha FJR1300
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Last edited by philharmonic; 07-19-2019 at 07:47 AM.
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post #3 of 6 (permalink) Old 07-19-2019, 12:50 PM
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Don't really know, would have to hear it. Big atta boy for changing out the original CCT as Phil says. Did you tie strap the cam chain at the crank while you swapped it out?

Is the hum the fuel pump, is the tank nearly empty, left or right side or ?? Could be perfectly normal, say like balance shafts noise.

Ray
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post #4 of 6 (permalink) Old 07-20-2019, 12:51 AM Thread Starter
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Yep, it was the original CCT, and yep, I zip tied the cam chain, although I'm wondering if it really is necessary. There was no slack or looseness in my cam chain. Could have possibly avoided the additional step of removing the cam chain cover and buying a new cover gasket.

I printed out a couple of posts from other folks having done the job, and watched a couple you tube videos of the process. I was READY. Had all the tools recommended. The you tube video from the guy in Ireland from Feb of this year made the job seem simple. NOT!. I used every tool I had to get at those bolts. I am not a novice mechanic and have a pretty good selection of tools from years of wrenching. No combination of socket, swivel socket, adapters, 3/8 drive, 1/4 drive, ratcheting wrenches would work. One bolt, the 'top' bolt came out easy- piece of cake. The lower hard to reach bolt, arrgghh. I had to use a open end wrench and work that bolt out 1 mm at a time, reversing the wrench every mm. It happened to be very hot during this job, so sweat was dripping down into my eyes and my glasses were fogging up. I was working by braille. Had to take a couple breaks taking out this ONE FREAKING BOLT. Took me almost an hour to get that one bolt out. I was cursing the Yamaha engineers for making those bolts too long and not designing enough clearance around those bolts.

Anyway, it's possible the hum was masked by noise from the original CCT. The bike doesn't perform any different before or after, so I'll just ride the darn thing and not sweat the humming noise. Still hits 140 no problem. oh yeah.

Thanks for the replies!

Jay

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Originally Posted by RaYzerman View Post
Don't really know, would have to hear it. Big atta boy for changing out the original CCT as Phil says. Did you tie strap the cam chain at the crank while you swapped it out?

Is the hum the fuel pump, is the tank nearly empty, left or right side or ?? Could be perfectly normal, say like balance shafts noise.
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post #5 of 6 (permalink) Old 07-20-2019, 10:06 PM
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Too much risk of the chain falling down off the crankshaft sprocket.... not worth a grenaded engine. Be glad you did it....

For that lower bolt.... cut off 8mm box end wrench about 3" long working from underneath... EZ, but guess you didn't find my old posts in the old sandbox from a few years ago....

Gasket, I've never replaced one... well one, the guy wanted one, so I did. Had many apart. Just have to be careful when you take the cover off, even if it separates, it won't leak, no pressure there.

Ray
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post #6 of 6 (permalink) Old 07-21-2019, 12:59 AM Thread Starter
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No, didn't find that post. Blame it on my short attention span. 3" long working from underneath....still doesn't sound like much fun, but maybe would have shortened the job. Hopefully there won't be a next time.

The cover gasket came apart in three pieces. I did not trust it's integrity so opted for the new gasket I had purchased. I was impressed with the new gasket. It had some sealant applied where the wires go through the sides of the case at the cover/case interface. Didn't have to seal it; already done. Also impressed with the machining surfaces of cover and engine. Smooth, and flat.

Quote:
Originally Posted by RaYzerman View Post
Too much risk of the chain falling down off the crankshaft sprocket.... not worth a grenaded engine. Be glad you did it....

For that lower bolt.... cut off 8mm box end wrench about 3" long working from underneath... EZ, but guess you didn't find my old posts in the old sandbox from a few years ago....

Gasket, I've never replaced one... well one, the guy wanted one, so I did. Had many apart. Just have to be careful when you take the cover off, even if it separates, it won't leak, no pressure there.
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