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YPVS Loses Position(?)

Started by 2steve, May 26, 2025, 03:42:43 PM

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1976RD400C

If you decide on a pcdi-10vt I would suggest the wire connection plug kit that Economy sells so you can add those on the controller wires and just plug everything into your existing harness (plug and play). Also the handheld programmer.
'76 RD400 green  '76 RD400 red   '84 RZ350

Simmons1

Quote from: 1976RD400C on July 31, 2025, 03:02:21 PMIf you decide on a pcdi-10vt I would suggest the wire connection plug kit that Economy sells so you can add those on the controller wires and just plug everything into your existing harness (plug and play). Also the handheld programmer.

Can you provide a link to the proper kit to order from Economy?

Thanks


2steve

And a Zeel cdi+power valve box is on its way from Granbury, TX. :thumbs:

My YPVS black box has a handwritten "GOOD" on the underside. It looks very good inside, too. I don't see the transistors in it that the 1984s had. Those were a replaceable problem. Anyway, it was replaced at some point.

Might use inline WAGO lever nuts for initial wiring.

Hoping to be able to visit, uhhh someone nearby, to have him load in his fave RZ curves into it before install.


m in sc

the solder joints went bad ont he 84 boxes before anything else. the trick was a hose clamp and a bolt. it stressed the box and would make it work, ask how i know ;)   sure we can load the curve in, but the one it comes with is good for sure.

2steve

I didn't know the Zeel was pre-loaded with anything useful.
John loads a stock program into his "1984" cdi box, which is not what I got.

I remember Tim saying your fave RZ curve made a significant difference.

Currently seeing the black/white wire for engine shut-off on the Zeel schematic and seeing the same color in the the original servo controller plug, (not cdi), wondering if it really wires into the Zeel.

m in sc

the colors are different. when i did mine, i got a full vintage connections kit and made a harness to direct plug it in. im not sure where you got yours but i think they come pre loaded with an rz curve from borut. 



2steve

#98
Quote from: m in sc on August 03, 2025, 07:06:30 PMthe colors are different. when i did mine, i got a full vintage connections kit and made a harness to direct plug it in. im not sure where you got yours but i think they come pre loaded with an rz curve from borut. 


Mine came in from Economy Cycle. It has 5 programs in it, (but John isn't sure that a suitable YPVS program is inside). One curve mimics stock.

The #2 program looks good, but I'm not clear on how to set it yet. Maybe it defaults to stock and I ground the brown/green wire once to switch it to #2.

Gotta study some more.

1976RD400C

^^ That's right, ground the wire for #2 ignition curve. I recently purchased the handheld programmer from Economy and you can change and monitor anything you want. Also, that new controller is going to "park" the power valve in the closed (low speed) position and I think the original leaves it in the open (high speed) position.
'76 RD400 green  '76 RD400 red   '84 RZ350

2steve

Got the cdi/YPVS control module from Economy. The Haase handheld was out on loan, so I wired it in anyway using Wago Levernuts after tinning all the ends and extending the stator pigtail.

It runs better. However, it's lean off the pilot and into the needle.

USB programming cable came in from Economy. Downloaded the RZ program and waded through the learning curve. Think I got it using Mark's curve plot points.

Raised the needles one step and turned in the air screws some.

Since it was raining and sweat was pouring from the heat/humidity, I didn't get to test.

Hoping for the best.

2steve

Happy to report that unplugging the thermosensor control and removing it didn't do anything bad. Made more room for the cdi pigtail.

Using the "velcro" cable ties was a necessity. Between them and the lever nuts, I can make changes, including adding shrink tubing later for protection.

m in sc

there you go. sorry haven't been much help, been sick since Saturday and just useless. Got covid, pretty sure i picked it up at the hospital from my 6 mos lung scan. the irony  :whatever:  :huh:

2steve

#103
Hospitals do suck. Spooky that we can all get a bug like that mid-summer.

Hope it's "just a cold" for you.

I expected to see what was already loaded on the unit and then tweak it, but the software doesn't work that way.

Appreciated the visit either way!

m in sc

glad it's running better. if its now seeming lean, that confirms it was an ignition issue for a while. 

yeah its more than a cold but im fine.