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YPVS Loses Position(?)

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

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2steve

I don't have that 3 conductor plug with red, green and brown.

There are separate green bullet, brown bullet and red/white bullet connectors.

Green to brown should be 2.55 ohm (according to the manual with differences from my reality) or 225 ohms, per some web post.
Mine is 132 ohms.

Brown to red/white (not just red) that does go to the cdi by a different route is 8MΩ. Presumably, should be 5.33Ω.

That could be the smoking gun. Confusion is the thing though.

Maybe someone threw in a workable stator from some other year.

What's the best route for a drop-in stator to try next?

m in sc

get it rebuilt by Rick's. it's done. same exact issue josglh had w his. expect to pay 380 ish

2steve

Found this. Would have helped with the plug and red wire confusion:
"The 1985 31K has changed Stator and CDI. The CDI is marked 52 Y-50. The 52 Y-50 CDI has also only 8 connections (the other two to have 9).

This CDI is missing the black-and-white cable, which serves to turn the engine off by the kill switch. The 85 stator is marked ÈZ or 8DX. The stator has two somewhat thicker load coils.

Safe distinguisher of the 85 stator is the red-white cable at the load coil, which is always red with both other stators! A further indication is the missing connector for the "load coil", which turns into three individual plugs (brown, green and red-white). The Rotor has the marking 51L."

mnein

Steve, guy selling a Vape ignition for 300 bucks in the for sale section. Guessing you've seen it...

2steve

Saw that, but looking at it today, I see, per Mark, that it would work on the RZ after all.
Have no clue on compatibility with stock CDi and future compatibility with CDi and power valve module changes.

Lack of knowledge is an issue here. Looks attractive to me.

m in sc

it should bolt right on. however, remember there's no keyway so it will need to be positioned.

2steve

I'm in.

Will need help with positioning method when it arrives.
Degree wheel, or just dial indicator on piston(?)
Thanks for the heads up, Matt
and the endorsement, Mark

m in sc

i do it with a dial indicator.

2steve

I do see some toastiness.

2steve

I don't see how the VAPE talks to the RZ CDi & power valve control.
Looks like it's for an RD.

Am I missing something?

RDryan

#40
Geez I hate to be that guy but I've been following this thread outta curiosity and yeah that set up diagram is what I used for my 75' RD250 and I have seen that Vape ignition listed here in the classifieds. I thought it was a good deal cuz it is but for the RD. Just getting on the Economy Cycles site I see specific complete Vape ignitions for either the RD's or RZ/Banshee's and you're on there you notice different SKU/part numbers. To make it more confusing...here's a link to the Vape site that list some of the different systems they offer for Yamaha bikes. Good site to bookmark there is also install instructions.  https://www.vape.eu/yamaha?page=2

Yeah I dunno, way over my head...I'm just looking at those assy. instructions and corresponding wiring diagrams. Looks like you pasted the correct one based off the part number listed but it seems like Vape just uses the same diagram for all the RD models they offer. Oh well a lot help I am. I do notice that they indicate one system that works for RD's and Banshees taking note of a longer crankshaft.

mnein

Yeah that one set of coils looks a little crispy. Acting as your useful idiot of a friend, I have a dial indicator that screws into the spark plug hole if you need to borrow one. Easy to send.

2steve

I have the cool indicator setup from Economy Cycle, Matt. It has made my life much easier with the RD400 points timing.

RDryan, I tried to be accurate on that product number and web schematic. The main number, 711379900, is the same. However, the one that snorkelfork is offering has an extra "-102-4" at the end of the part number. Don't know if that makes a difference.

This could be a bust. He plans to look into the included schematic and get back to me. snorkelfork is a good dude.

m in sc

the powervalve controller and cdi are all based off ignition signal. it will work, period.  will it wire right in directly? no you need to get the signal sourced. the easiest way is.. get a zeel and wire it all in at the same time. OR reach out to vape. Imho the best thing to do to KEEP IT SIMPLE is to get the stock stator repaired.  or, contact vape and ask for a schematic. but you're going to have ro spend some money one way or the other

2steve

It's a pay less now on stator repair with some delay to get it running AND pay more later when something else fails (because there's no "Ralph" a few doors down anymore).
At work, I find overseas communicating to be problematic.

Yeah I see, Mark.

I'll check in with snorkelfork.

Life's short and I have limited time to spend in the garage. Since I might tragically die some day, a Rick's rewind looks like the thing to do.

$800 for NOS on eBay.