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TOPIC: ignitor wiring zr550

ignitor wiring zr550 23 Jun 2018 20:06 #785770

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Wow wow wow!!!! I take it back. I cranked up the advance 6 degrees and the bike just.wants.to.go.fast!! Holy crap. It’s like a freakin turbo. Changed the whole character of the ride. When not gunning it the bike is like a caged animal, kind of bucking/begging to go. Not smooth at all. But if I give her what she wants, man!
Also noticed popping on decel disappeared entirely.
I don’t think I’ll crank it up this high in the city, the bike is way too jumpy. But on these twisties :) :) :)
No pinging yet. Do I dare go to 8 degrees?
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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Last edit: by Zaddict.

ignitor wiring zr550 23 Jun 2018 20:20 #785771

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Well, just be careful. Many people experience the euphoria just before things blow up :)

I wonder how hard it would be to add a knock sensor somewhere.

I'm curious as to what the 6 deg value means. The stock advance is way more than 6 deg, so is it 6 more than stock? I wouldn't have thought 6 deg would have been that effective.

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ignitor wiring zr550 23 Jun 2018 21:20 #785773

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loudhvx wrote: Well, just be careful. Many people experience the euphoria just before things blow up :)

I wonder how hard it would be to add a knock sensor somewhere.

I'm curious as to what the 6 deg value means. The stock advance is way more than 6 deg, so is it 6 more than stock? I wouldn't have thought 6 deg would have been that effective.


Yikes. That's a scary thought. Now I need to research knock sensors. Though I'm thinking if something didn't blow during this past run, it should be fine. I was at or past redline many times.

I have the ignition curve at home, will post it when I get back. But yes, it's basically six degrees advanced over stock - all in at 43 degrees BTDC. I was hopeful that advance would help because I'm running the higher duration zx550 cams with stock 9.5:1 pistons. I'd read that one way to make up for lower dynamic compression is to add some advance. Don't know if that's what's happening, but something awfully fun is...
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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ignitor wiring zr550 24 Jun 2018 11:43 #785805

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Here are the curves

1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...
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ignitor wiring zr550 24 Jun 2018 13:48 #785820

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That's interesting. The SW+8 position is really only about 5 degrees more advanced than a Zx550 . Zx550's max out at about 40 deg BTDC.
So the SW 0 would have been retarded compared to a Zx550.

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ignitor wiring zr550 24 Jun 2018 14:22 #785825

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I’m very tempted to try +8 (45 degress total advance). Wonder if i should use higher octane gas. Still running 87.
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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ignitor wiring zr550 24 Jun 2018 17:56 #785837

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Averaged 45 mpg today. The highest I'd gotten since swapping in zx550 cams is 40mpg ... so something is more efficient now. So pleased with this new system!!!
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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ignitor wiring zr550 27 Jun 2018 02:01 #785961

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Yes for higher octane. if your going to push the ignition timing. You might not get pinging now but it might be a different story in hot weather
A knock sensor would be nice B)
1982 KZ550H1

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ignitor wiring zr550 27 Jun 2018 03:29 #785962

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loudhvx wrote: That's interesting. The SW+8 position is really only about 5 degrees more advanced than a Zx550.

I think the biggest difference starts around the 3000 rpm point, theres 6-7 degrees more than the ZX550 and is more like the KZ550s 35 degrees @ 3200rpm mechanical advance then reaches full advance round 8000rpm instead of 10,000rpm on the ZX550's

loudhvx wrote: So the SW 0 would have been retarded compared to a Zx550.


Total advance might be less but its very similar @ 3000rpm, it might even have more advance up from there up to around 8000rpm than ZX550 ,
Im pretty sure i read the ZR's had 35 degrees total, itwould be nice to see the factory ZR550 ignition curve for comparison.


1982 KZ550H1
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ignitor wiring zr550 27 Jun 2018 07:42 #785971

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But on a 550, 3000 rpm is nowhere near the power band really.

You would lose time looking for power at 3000 rpm. That would be downshift time or rev and clutch slip time. 3000 and light throttle would be fuel economy cruise mode, and that would be a slow cruise at that.

The kz advance down low is too much
, which is why the mechanical advance is a compromise. Lugging the motor that low while trying to get power would do bad things... Lots of knock. Which is why they went to electronic advance.

For power you would only be concerned with about 6000 rpm and up, maybe 5000.

I think the factory limits total advance in later years due to emissions.

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ignitor wiring zr550 27 Jun 2018 08:33 #785972

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loudhvx wrote: But on a 550, 3000 rpm is nowhere near the power band really.

You would lose time looking for power at 3000 rpm. That would be downshift time or rev and clutch slip time. 3000 and light throttle would be fuel economy cruise mode, and that would be a slow cruise at that.

The kz advance down low is too much
, which is why the mechanical advance is a compromise. Lugging the motor that low while trying to get power would do bad things... Lots of knock. Which is why they went to electronic advance.

For power you would only be concerned with about 6000 rpm and up, maybe 5000.

I think the factory limits total advance in later years due to emissions.


Exactly!! As the Kawasaki KZ550 performance chart below shows at 3000 rpm (red circle) the engine makes about 17 hp while at 6000 rpm (green circle) it makes about 40 hp. Also, using stock gearing, in top gear 3000 rpm would only propel the bike a bit less than 40 mph. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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ignitor wiring zr550 27 Jun 2018 09:19 #785974

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Yeah i know there is very little power down that low i was looking a the graphs using 3000rpm as a starting point just for comparison purposes, thats all
The SPII has options for more advance at those rpm points. SW4 has 40 degrees advance @ 4500rpm , that's 5000rpm earlier than the ZX550 igniter,
zaddicts 43 degree total setting probably has 40 degrees @ 6000rpm and by his comments hes feeling it

i have read that some factory ignitors are suppose to have 35 and 40 degrees of advance @ 3500
1982 KZ550H1

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ignitor wiring zr550 27 Jun 2018 13:23 #785989

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The factory Kz550 advancer spec has 35 deg by 3000 at the earliest, but it's not really ideal. It's part of the tradeoff using a mechanical advance. If a company was making that same advance curve intentionally, I think it would require CV carbs and would be for fuel economy purposes. On the Kz, with mechanical carbs, calling for power at 3000 RPM, in top gear, would definitely induce knock.

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ignitor wiring zr550 27 Jun 2018 22:18 #786015

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Wozza wrote: It would be nice to see the factory ZR550 ignition curve for comparison.


I'm curious too. I've never seen one. It's not in the FSM.

Wozza wrote:



Do we know why there are two curves here?
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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ignitor wiring zr550 27 Jun 2018 22:27 #786016

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Wozza wrote: zaddicts 43 degree total setting probably has 40 degrees @ 6000rpm and by his comments he's feeling it


I sure am. Much more power and responsiveness off the line all the way past redline. Here's the review I just left for the SPII on Webike:

I can't tell you how pleased I am with this ignition. I bought it for my zr550 based on the glowing reviews on Webike. Phrases like "torque is overflowing", "it is like a turbo", and "it was like riding a liter bike for the first time [for a zr400]" caught my attention. I experienced every one of those sensations after installing the SPII. Even without adjusting the ignition curves, my bike felt much stronger. After cranking the advance up to the max, the bike transformed into the hyper-responsive little torque monster screamer I've lusted after since I first started modifying it.

I'm not sure how the SPII would affect a bike that is completely stock. I've got zx550 cams, a Factory Pro Stage I jet kit, Kerker race exhaust and K&N filter. For me at least, the results have been phenomenal - much more noticeable power gain than any of the previous mods. I can't recommend this product highly enough. It's the best money I've spent on my bike. I'm going to get the bike professionally tuned now, largely to make sure I don't have the advance set high enough to cause damage.

1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...
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ignitor wiring zr550 28 Jun 2018 04:58 #786022

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I think Mark is sponsored by Webike. LOL!!! Looks like money well spent for you.
'85 GPz550(ZX550-A2)

GPz550 Base Manual --> tinyurl.com/ze5b3qo
GPz550 Supplement Manual --> tinyurl.com/h34d2o6
GPz550.com --> www.nwsca.com/scripts/gpz_forum_2005/default.asp
First Race Win GPz550 --> tinyurl.com/o5y3ftp

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ignitor wiring zr550 28 Jun 2018 06:01 #786029

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Gotta love the Japanese translation on webike:)
Are you planning on getting another dynotune?

Do we know why there are two curves here?

If the Factory ignition timing falls between the two lines when testing its considered good to go,

So does the factory ZR550 have 35 degrees max timing ? Ive found somebody wrecking one and was thinking about grabbing the ignition off it

I have experienced some pretty crazy death rattle s from mechanical advance under high load and low rpm, in sixth i think i would drop down a gear or two
1982 KZ550H1
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ignitor wiring zr550 28 Jun 2018 10:56 #786042

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Like Wozza said, the FSM specifies a range. The real curve is meant to be between the two lines. So you can assume the real target curve is a line drawn exactly between the two lines shown.
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ignitor wiring zr550 02 Jul 2018 21:39 #786334

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Wozza wrote: Are you planning on getting another dynotune?



Yes, probably week after next. I'll post results. I'd be very surprised if I didn't pick up a few hp across the whole rev range.

Wozza wrote: So does the factory ZR550 have 35 degrees max timing ? Ive found somebody wrecking one and was thinking about grabbing the ignition off it



Here are the zr550 numbers from a pic Corey posted in another thread.


1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...
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ignitor wiring zr550 04 Jul 2018 09:59 #786400

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Here's As Uotani's (Google translated) response about the function of the blue wire -

The blue line of the SP2 kit "00324 SP II Full Power Kit (K. ZEPHYR 400)" is a pulse output line for external electrical tachometers.
Digital pulse, 1 pulse / rotation.
It is not used when it is not necessary.


I think that's further evidence that the grey wire on the zr400/European-spec zr550 indeed does nothing as currently installed. Seems it was originally intended to provide signal to a tachometer.
1990 Zephyr zr550 B1
Factory Pro Stage 1 jet kit
zx550 cams
SPII ignition system
Kerker stainless steel race exhaust with 1.5" competition baffle
K&N Air Filter...

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Last edit: by Zaddict.
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