I am having an issue with the High C String on my John Myung Yamaha JM2 Bass. The rest of the strings are comfortable for playjng, however, the High C is a bit high for my liking (see photo). The bass has a dual truss rod and I adjusted with small turns to each rod to lessen the relief on each side of the neck (Low B and High C). Relief is fine. The string action on the High C is maxed at the saddle and there is still a noticeable gap at the 12 fret (without the string being depressed). The picture is my thumb on the 12th fret to show you show space at fret. Any suggestions yo get that string lower?
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John Myung JM2 Yamaha 6 String Bass issue with High C String
- Thread starter Justbeingjosh
- Start date
Like to provide a few picture of the bridge, so we can see what is going on there?
Shim at the the butt-end of the pocket or full pocket, if desired. The saddle has bottomed-out, correct?
Riis
Riis
Years ago I had the same problem.
I took the saddle off and ground the bottom down a bit.
I took the saddle off and ground the bottom down a bit.
I’m not a luthier, but judging from the pictures the neck seems twisted: any chance to correct that using the double truss rod?
By the way: I used to have the same bass, the plum color version. It’s an incredible bass. I miss it
By the way: I used to have the same bass, the plum color version. It’s an incredible bass. I miss it
Yes, the saddle is bottomed out. Thanks for the information. What about filing the nut slot a bit?
You could easily shim the neck. I am not seeing any twist.
thought about same exact thing
Attachments
It’s probably a result of the double rod not being correctly. I would guess I would have to loosen all the way and then tighten to my liking in equal amounts. Very annoying.
Don't touch the nut unless you've done the necessary measurements and find it is indeed out-of-spec...we can help.
Dual truss rods, IME, work in tandem as a single unit. It's virtually impossible to vary treble or bass side(s) independently and, even if you could, it would introduce a twist and we know that's not good.
When impatient, I've been known to run a file thru the offending saddle slot (...it's usually the G on a 4 or 5 string). Standard practice is the addition of the aforementioned shim when we've run out of "travel".
Riis
Yep I will most likely have to do so. I loosened both rods as far as I could go and then retightened in equal amounts. Back at square one lol. I will shim the neck lol. Thanks for the information.
Loosening both off and tightening by feel is a pretty inexact way to do this,
We would ordinarily capo the first fret, hold down the B-string on that side where the fingerboard meets the body and check the clearance at the 7th fret with feeler gages. Then repeat on the C-string on the other side, the idea being you want the clearance on both sides (and therefore across the fingerboard) to be the same.
On one hand, a treble side truss rod could be 'out' enough to raise the action on that side, but I'd be hard-pressed to think only on that one string.
If you are not versed in proper set up procedure (and there's no harm in that), I would urge you to take this axe to a qualified, experienced guitar repair person and get it evaluated. There's a process to doing this right, and the fact that one string out of six is that far off is strange.
And of course, it's impossible to diagnose this or most any setup problem via pictures over the web. Take it to a pro.
We would ordinarily capo the first fret, hold down the B-string on that side where the fingerboard meets the body and check the clearance at the 7th fret with feeler gages. Then repeat on the C-string on the other side, the idea being you want the clearance on both sides (and therefore across the fingerboard) to be the same.
On one hand, a treble side truss rod could be 'out' enough to raise the action on that side, but I'd be hard-pressed to think only on that one string.
If you are not versed in proper set up procedure (and there's no harm in that), I would urge you to take this axe to a qualified, experienced guitar repair person and get it evaluated. There's a process to doing this right, and the fact that one string out of six is that far off is strange.
And of course, it's impossible to diagnose this or most any setup problem via pictures over the web. Take it to a pro.
Thanks for the information. When I initially set it up I did the method of checking the relief at each side (Bass & Treble). I did loosen both rods as far as I could yesterday and slowly tightened in increments. It plays great and the relief and action are to my liking aside from the C string. It’s up too high. I know enough about set ups, but when it is coming to this issue, I agree I am taking to a pro. Thanks
