Yamaha 620 valve trigger adjustment.

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PaulT
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Yamaha 620 valve trigger adjustment.

Post by PaulT » Tue Jun 11, 2019 10:47 pm

Is the valve trigger on a Yamaha 620 adjustable? The linkage rod has a knurled connector that appears to be turnable.
Bach5G
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Re: Yamaha 620 valve trigger adjustment.

Post by Bach5G » Tue Jun 11, 2019 10:56 pm

620 tenor or 620 bass?
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sirisobhakya
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Re: Yamaha 620 valve trigger adjustment.

Post by sirisobhakya » Wed Jun 12, 2019 3:56 am

As far as I remember, the thumb trigger of both model is not adjustable, at least by normal means. The Eb/D paddle of the bass, on the other hand, can be adjusted.
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Yamaha YBL-830 + Yamaha Douglas Yeo Replica
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PaulT
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Re: Yamaha 620 valve trigger adjustment.

Post by PaulT » Wed Jun 12, 2019 9:19 am

The tenor.

The trigger assembly t is a good fit as it is and it works really well in conjunction with the Neotech grip I have on the horn. I've just been looking at that knurled connector on the rod and it looks like it can be unscrewed. Actually, I expect it can be unscrewed, it's how the thing is put together. I was just wondering if it was an adjustment screw or a leave it along and don't touch it screw.
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greenbean
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Re: Yamaha 620 valve trigger adjustment.

Post by greenbean » Wed Jun 12, 2019 10:48 am

My guess is that you can unscrew it a bit to make it longer - and raise the thumb lever. You would need to first remove the linkage from the valve. The set screw holds it on. But, like I said... this is a guess. Please try it and let us know!
PaulT
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Re: Yamaha 620 valve trigger adjustment.

Post by PaulT » Wed Jun 12, 2019 9:07 pm

Sheesh! Boy, do those little pieces ever break easily.
PaulT
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Re: Yamaha 620 valve trigger adjustment.

Post by PaulT » Wed Jun 12, 2019 9:12 pm

(Yamaha got back to me. The trigger lever on 620 is not, by design or intent, adjustable. They did suggest that if I was having an issue with it to see a repair person at an authorized Yamaha dealer. They furnished a link to my hometown dealer, which has a good repair person. As I'm not having an issue with the lever, I will let the matter rest)
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