Dual Plug cylinder head for GPZ 750

Not for a 750, but I know zed1015 has done it on his kz1000 head. I don't think it's any different than the 750 head for a dual plug setup.

Do you have a link to the coils you used? I'm interested in what the model is.

Not sure that dual plugging by itself will give you much extra HP, but I believe that when used in combination with higher cylinder pressures and higher octane fuel it can make a big difference in the amount of advance you can run.

(edited as the offending posts have been removed)

DoubleDub wrote: Not for a 750, but I know zed1015 has done it on his kz1000 head. I don't think it's any different than the 750 head for a dual plug setup.

Do you have a link to the coils you used? I'm interested in what the model is.

Not sure that dual plugging by itself will give you much extra HP, but I believe that when used in combination with higher cylinder pressures and higher octane fuel it can make a big difference in the amount of advance you can run.

I've done quite a few now.
Made up a drilling jig that bolts to the heads outer location dowels to get the plug positions exact every time.
I don't bother re-angling the four original plugs though as there's no measurable advantage but a nice touch,same as the the S1.
I use dyna-S and four dyna 1.5 ohm coils wired in series.
An easy set-up with just a short link wire needed and they work like a four post 3 ohm coil.
Set timing anywhere between 28 to 35 deg depending on spec etc.

There is a similar conversion going on here www.750turbo.com/forum/viewtopic.php?f=8&t=10163

The Rainey bike had 4 coils and FWIW I think this is going to be down to which ignition is used more than the number of plugs.

les holt wrote: Can't say I've ever seen a dual plug head on a 750. Bet you have to pull a little timing out it to be where you want. Look on KZZone's website for greg copes tuning tips, I believe he talks about it.

Les

www.aperaceparts.com/cope.html

i keep it book marked lol cool stuff, says dual plug can allow 4 to 6 degrees less than single.

There ya go, I knew I had seen it and didn't want to take any credit!

Les

my 70mm bore Z1 has dual plug head, and 6 degrees less spark advance is what works best.

WOW!!

DoubleDub wrote: (edited as the offending posts have been removed)

No they ain't haveakaw's still here.

Elevation will play a role in determining the optimum timing as well. Something to keep in mind for when others post their timing settings.

Hollywoodmx wrote: Elevation will play a role in determining the optimum timing as well. Something to keep in mind for when others post their timing settings.

That's same when it comes to any kind of tuning or performance numbers posted :laugh: