YVPS 31 with ignition problems Zeeltronic

[Bakker RD]

After a ride of approximately 20Km I parked my Bakker Rd 350 for a coffee to find that one hour later it would't start. No spark. All connections seem ok. 

It might be the Zeeltronic, the PCDI-10PV. How can I test this unit for correct operation?

A thing I noticed since I have my bike running is that the PV's go through a test cycle, like the cycle after you switch on the ignition, when you motor the engine with the kick starter. It does that every time. Even now it wouldn't start. Is this normal?

Cheers,
William

[midlifecrisisrd]

Sounds like a power issue

Zeeltronic usually won't start with a flat battery

Either that or it is due to the valves parking in the open position when not running so when you kick it over it is seeing the rpm and opening the valves then closing when it doesn't start

Steve

[Bakker RD]

Thanks for the suggestions.
However the battery is good.
The test cycle after switching on the ignition is standard yes? I assume it is opening and closing. Closing for start. But why should it do that again during Kickstarting?

[midlifecrisisrd]

Standard bike parks the valves open when not running

Hence why the difference if stopped by the kill switch or ignition switch

Kill switch and the valve parks open. When ignition is switched back on it will open, close, open

Ignition switch Kill and it will already be closed so just open, close

As said if engine turns fast enough but doesn't start it will close then open

Think that's the way it works

Steve

[marrcel]

Just a thought. Pv cycle on kickstart. Why?
The only thing i can think of you’re wiggle the bike. Battery clamp, key switch, kill switch or what ever there must be a loose contact. Do you have a jiffy switch?

[Bakker RD]

marrcel : I'm thinking along the same lines. I will check al the 12V connections. And the ignition lock.
However this ' bonus PV test' was already the case when it still ran. And it ran very well. I only have a low reading Scitsu but have also noticed that the Scitsu needle goes to 10.000 rpm when I select the horn. Must be a poor earth somewere.

Cheers,

william

[midlifecrisisrd]

I had that with an Ignitech

Crap battery made it worse

Steve

[Bakker RD]

Just came round to work on the Bakker RD. I have checked all the connections and measured the inputs from the map selector switch to the Zeel. (I have modified a turn indicator switch to act als map selector and kill switch as I do not have turn indicators fitted. Lh turn is Map#1. off is Map#2 and Rh turn is kill switch. I have no switchgear at the right handle bar which I find a clean look for what is essentially a race bike with a license plate. Ignition barrel is on the Lh side of the frame, Harley style, so the top yoke looks clean like a race bike.
All measurements checked Ok. I removed the cover from the YPVS quadrant and noticed the open position not corresponding to the pilot hole. It came about 3mm short. The threaded adjusters were also not at the same height indicating that they are mechanically off. I set the valves to the pilot hole and the threaded adjusters are now approximately equal in length. I spoke to Borut of Zeeltronic about the 'bonus' PV test cycle when using the kick starter and he claimed it can happen. Nothing to worry about. The PV moves a little bit when you step on the kick starter probably due to the fact that the rpm reading is not reliable causing the Zeel to command a PV movement of about 20% (visible when you hook up de Zeel to the PC). Has anyone has the same experience whit their Zeel equipped Rd?
I noticed a spark when kick starting the bike with a connected spark plug agains ground so the bike will probably run. Great! I'm not sure why it has a spark as it hadn't one when I last rode it and I had only measured stuff but you can be lucky sometimes.
To investigate why the Scitsu tacho needle moves when the horn button is pressed I fitted a new ground wire for the horn far away from the Scitsu wiring and that helped. Somehow the Scitsu picked up a signal and responds. I have added a braided shielding around the wire going from the Zeel to the Tacho and grounded that shielding. This almost resolved the problem and after I had the bike out for a test start I noticed the nacho now seems to read more accurate than before. It was about half the actual Rpm but now it seems close to the actual number. Again lucky!
I had to postpone the testdrive because of a leaking exhaust gasket. I have used a pattern gasket but they seem no good so I ordered a set of OEM Yamaha gaskets today. These things are expensive!

I'l report back after the test ride.

Cheers,.
William

[Bakker RD]

I have taken the dry Monday afternoon for a 25 km trip around my home town. The Bakker behaved flawlessly. She is however by far the most uncomfortable bike I own. A race tuned two stroke does not like to be in traffic and the riding position puts more weight on my wrists than on my ass which is specially designed for it. The two stroke rush when 'it comes on the pipe' however more than makes up for these maladies and the power is awesome! The 110Kg dry weight must have something to do with this.
One problem keeps bugging me and that is a crack in the pipe which does not want to be closed. There is a smal patch welded over the repaired crack but whenever I put a drop of weld on a seeping pore another pore starts to weep oil. The header section seems to be porous and this is b...tch to fix. a slicht electrical glitch is still present. The rev counter dances about and sometimes the idiot lights flicker indicating a power problem. Will try to remedy all this in the coming winter season.

I have a tyre question. At the moment I have Pirelli Sport Demons fitted. they are over 10 years old. At the time it was this or BT45's. Period test favored the Pirellis but only just. Now the BT46 is available. Is this a noticeably better tire?
Sizes 100/90-16 and 120/80-18

[Robbieben]

Oct 19, 2021 9:50:05 GMT 1 Bakker RD said:

I have taken the dry Monday afternoon for a 25 km trip around my home town. The Bakker behaved flawlessly. She is however by far the most uncomfortable bike I own. A race tuned two stroke does not like to be in traffic and the riding position puts more weight on my wrists than on my ass which is specially designed for it. The two stroke rush when 'it comes on the pipe' however more than makes up for these maladies and the power is awesome! The 110Kg dry weight must have something to do with this.
One problem keeps bugging me and that is a crack in the pipe which does not want to be closed. There is a smal patch welded over the repaired crack but whenever I put a drop of weld on a seeping pore another pore starts to weep oil. The header section seems to be porous and this is b...tch to fix. a slicht electrical glitch is still present. The rev counter dances about and sometimes the idiot lights flicker indicating a power problem. Will try to remedy all this in the coming winter season.

I have a tyre question. At the moment I have Pirelli Sport Demons fitted. they are over 10 years old. At the time it was this or BT45's. Period test favored the Pirellis but only just. Now the BT46 is available. Is this a noticeably better tire?
Sizes 100/90-16 and 120/80-18

Remove the exhaust and clean it inside and out with acetone or brake cleaner, you never get a good weld if oil is present, make sure all the cleaner has evaporated off before welding or you'll have fireworks.

Sounds like you have a bad connection somewhere on your electrics, there isn't a lot to check so hopefully easily found.

As for tyres have a look at Avon Roadrider 2, nice tyre, decent grip etc. I have a set fitted to my GT750. They cover most period sizes.

[Bakker RD]

The Avon Roadriders are not available in my sizes. I have read a lot of good reviews on the new BT46. Maybe I will try those. I will not do the milage but with a very lightweight bike I can use all grip I can get. Unfortunately all bias ply tires are made for medium to heavy weight classics.

[Tobyjugs]

Try looking at the Heideneu tyres. I've heard they're sticky but not sure if they are road legal.