YPVS Loses Position(?)

[m in sc]

just bring it to the house. I got my programmer back we can look at it one sunday if you want.

carbs dont suddenly need brass changes. 

[2steve]

Likely needed, as I can't figure it out and it would be foolish not to know and just get new carbs (when it's something stupid and unrelated that I might have done).

Speaking of new carbs:
Which PWK's from which Toomey?

28mm for stock porting and non-stock programmed curves?

They take oil lines?

[m in sc]

etd has a setup for rzs, basically pre setup and ready to go. thats all I know

[2steve]

Rode today to prove that I could make it to your place, Mark.
Did well enough for that. No fuel flow issues anymore.
Clutch slips at max power delivery.
To me, that is actually good news.

Are FZ1 clutch frictions still the way to go on an RZ?

[m in sc]

yup. good glad the fuel delivery is good.

[teazer]

IS clutch slip common on RZ's?  Mine is 99% stock and I was wondering if I would need new plates in case I take it to the drag strip to get my brain back into gear.

[2steve]

Previously, the clutch was inspected, looked good, and assembled.
This is a fresh 2nd over 64.5mm rebuild. It was a cooler day and has a better ignition curve. Toomey pipes.

Seems that that combo of factors was too much. Seat of the pants said not much power delivery loss, but revved to 10k and stayed there while increasing speed.

Maybe it was right on the edge of being insufficient all along.

[1976RD400C]

My clutch slips until the bike warms up all the way (15 minutes) and then it is ok. I've tried different plates, springs, oil but when cold it acts like an old Chevy power glide transmission when it hits peak power. It definitely stops slipping when hot.

[m in sc]

fz clutch discs, fresh steels or blasted ones, and good springs should hold 75-80 hp easy. if not, somethings amiss

[2steve]

Carb set from Mr. Edmond at ETD is $700. Carb set with cable and fuel lines, no filter - bolt on and go.
He's a good communicator.

You know that sounds really good to me after spending all summer taking stock RZ carbs off and back on.

Still imagining that the left carb is dragging me down, (but it wasn't before)

[2steve]

Mark kindly blew his entire Sunday afternoon - on into some of the evening, earlier this week.
He went through everything that would be obvious, or not so obvious.
It's not the YPVS.
It's not the ignition controller. I probably still have a good original YPVS and 52Y ignig controllers.
Not the stator.
It's not the carbs. That took a good bit of time.
The "fuel feed problem" is not real. It's electrical somehow, related to the breaking up in lower range.
...and multiple other things were eliminated from the suspect list.
Good thing we went through and checked before I blew a wad of money on carbs.

I have the assignment to unplug the kill switch and do a ride test. That could be a culprit. Found out today that it is patched back into the system inside the headlight bucket.
Also - the iggy switch should be replaced as a precaution. $32 on eBay in USA.

Finally, the ride home being dark with one pull-over on the side of the road and then restart (weird, like the trip down on the interstate) revealed that the headlight is pointed too low and the turn signal cancelling is still a thing 
So, I took encouragement from the signal cancel because I thought those all die after a few decades.

Thanks MUCH, Mark. At least he seemed to prove that I'm not an idiot doing something dumb.
It's no secret that he is a top drawer dude. It's also obvious that he and Angie are a match made in Heaven.

[m in sc]

thanks Steve.  it was fun.. but def frustrating. im glad we eliminated a bunch of things.  you/we'll get it. as always, glas to help . and thanks for the kind words. yes, angie is def a special one.

[mnein]

I don't know M in SC, but it's awesome to see him helping everyone out with advice and/or hands on work. God bless you sir. This has got to be the most useful forum I've ever participated in.

[1976RD400C]

Is there a specific rpm that you notice this is happening at?

[2steve]

Idles great. Trying to get it rolling from a stop is a problem. Above about 4k and over 1/8th throttle, it clears up. Constant droning away on the highway invites a slow decline to a possible shutdown pullover situation, but will start back up.

Above 4k and at full throttle is mostly a very pleasant experience.