Topic: Salt Racer CB 750 OZ style

[bear]

This is done for me !

Good move I think.

Cheers,
Brian

[Old Scrambler]

Johno............thanks for the hard work and expensive experience

I will stay with the basic Dyna S for now...............but will change from OEM coils and wires to new Dyna 5-Ohm coils with new wires and resistor caps.

[hotdog]

This is done for me !

Good move I think.

Cheers,
Brian

Bear, what ign do you run on the sidecar.?

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[Retro Rocket]

Johno, I couldn't be bothered going back through the whole thread to find out but, are you running total loss ignition on this bike, I have a complete total loss Gerex ignition from my old drag bike i would be willing to donate if you need it...?

[johno]

Thanks for the offer mate,  happy to pay.
While I have heard of them I dont have any experience with that system,  apparently the main development in electronic ignitions lately has been in the pickups not so much in the secondary spark  ( they all seem to produce 30 to 40 K volts)

Over the last two years On my 69 Kwaka H1 500 I went through a couple of original CDI power packs as the capaciters in the cdi units are made old school from paper and they junk out with time so I upgraded to a custom made modern capaciters unit and  bam spark like a welder.
Do you have any info on the Gerex system to help me understand it ?
cheers johno

[Retro Rocket]

Thanks for the offer mate,  happy to pay.
While I have heard of them I dont have any experience with that system,  apparently the main development in electronic ignitions lately has been in the pickups not so much in the secondary spark  ( they all seem to produce 30 to 40 K volts)

Over the last two years On my 69 Kwaka H1 500 I went through a couple of original CDI power packs as the capaciters in the cdi units are made old school from paper and they junk out with time so I upgraded to a custom made modern capaciters unit and  bam spark like a welder.
Do you have any info on the Gerex system to help me understand it ?
cheers johno

I still have all the original paperwork, it all came with the bike, Let me dig it out and scan it for you...

Scottly runs a Gerex ignition on his street bike, he may know some info as well...

[scottly]

apparently the main development in electronic ignitions lately has been in the pickups

Nothing new about optical pick-ups, Johno. I had an optical Accel distributor from the late '70s on a small-block Ford, in a Cobra replica. It worked long enough to take a couple of short test drives up and down the street, then crapped out when I tried to restart the car to pull it back into the shop.

[Retro Rocket]

Johno, PM me your address and i'll send all the paperwork, there's 10 pages of info on this ignition, instead of posting 10 pages of info here, it would be easier just to mail it too you...

Scott, do you have anything to add on the Gerex unit...? 

[scottly]

Hey Mick, do you have your paperwork scanned? If so, I would like a copy emailed to me. Thanks!
The Gerex is a true multi-spark CDI, with Hall-effect pick-ups. I have no idea where a certain ignition maker came up with the notion that both Hall-effect and reluctor pick-ups vary by plus-or-minus 7 degrees. 
IIRC, the first Kaw ignitions were crap, and they resorted to points for a while?

[Retro Rocket]

Hey Mick, do you have your paperwork scanned? If so, I would like a copy emailed to me. Thanks!
The Gerex is a true multi-spark CDI, with Hall-effect pick-ups. I have no idea where a certain ignition maker came up with the notion that both Hall-effect and reluctor pick-ups vary by plus-or-minus 7 degrees. 
IIRC, the first Kaw ignitions were crap, and they resorted to points for a while?

I will PM you the scanned copies Scott...

[scottly]

What worries me is Power arc insist on it being a non wasted spark system but its not. He says he wastes the spark on the next exh stroke on the same cylinder

WTF?? What does he think wasted spark is??? If you can swap the 1&4 spark plug wires, or the 2&3 spark plug wires, as their instructions state, it's a wasted spark system. Also, the advantage of an inductive system over a CDI is the duration of the spark: a typical inductive system has a longer spark duration than a CDI system, with longer dwell times to saturate the coil. The 2nd and 3rd spark do not have enough dwell at higher RPMs to saturate with only 15 degrees of dwell, and the dwell period may even overlap the spark duration.

[Retro Rocket]

Ok Guys, check your PM's...

[johno]

Thanks Mick,
I'll read up tonight.   ................. Ol Captain webber I reckon we will have to come up with a new nick name for you Scottly    something to do with ignition maybe,  like  Sparky    my extensive knowledge stops with I just know when you hang on to the leads they bite 

[bear]

This is done for me !

Good move I think.

Cheers,
Brian

Bear, what ign do you run on the sidecar.?

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I have run Dyna pickups with late model Honda OEM coils and have done for years.
I,m running methanol and high cylinder pressures and it's never let me down.

I,m with Scottly, re that furphy about the pickups signaling +/-7deg. That's a load of BS.

[hotdog]

Thanks for your reply Bear, I agree with the +/- 7deg  as I currently run a couple sets of pamcos with no issues.

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[scottly]

Johno, PM me your address and i'll send all the paperwork, there's 10 pages of info on this ignition, instead of posting 10 pages of info here, it would be easier just to mail it too you...

Scott, do you have anything to add on the Gerex unit...? 

I read through the race info on your Gerex, Mick. Wow, max voltage is 12.6, which rules out using a LiFe battery, even total loss. 10 amp draw!!! I would only use it on a drag bike, for 10 seconds at a time.

[Retro Rocket]

Johno, PM me your address and i'll send all the paperwork, there's 10 pages of info on this ignition, instead of posting 10 pages of info here, it would be easier just to mail it too you...

Scott, do you have anything to add on the Gerex unit...? 

I read through the race info on your Gerex, Mick. Wow, max voltage is 12.6, which rules out using a LiFe battery, even total loss. 10 amp draw!!! I would only use it on a drag bike, for 10 seconds at a time.

Funny that Scott, it came of a 750 drag bike running 10's.....coincidence...?   

[Jerry Rxman Griffin aka MuthaF'er]

Does anyone else have a NOS Gerex NIB beside me? 

[scottly]

It don't work while it's still in the box, Jerry.

[johno]

Well, its spring, had the winter to get over the blues of this engine damage, time to fire up again....here we go again

[johno]

Well well, the most used and abused stage 4 head is back in business 
Welded up nice, cc'd the chamber, kissed all the seats with the Neway CNC seat profiler so all nice and the same.
As new Mike !   3rd time lucky hey

Mike supplied the parts needed and managed to dig up some hard to find rings for me , thanks bro !

[johno]

So now have the parts to shake a leg, head , valves, seals, piston( thanks Bill), rings, gaskets, oh and a new ignition to try 

[Bill/BentON Racing]

Nice, now is that a proven ignition please sir!!!  I need a set of 970cc buttons, wonder if Jays got em? Sent Mike my turbo head yesterday! K, G'luck mate, Bill

[Old Scrambler]

SOHC Porn

Dave advises against buttons............he sees them distorted or 'missing' in too many high-performance motors that have 'problems'..............prefers standard clips......no tails

I see the DYNA ignition.........tell us more

[Jerry Rxman Griffin aka MuthaF'er]

Nice, now is that a proven ignition please sir!!!  I need a set of 970cc buttons, wonder if Jays got em? Sent Mike my turbo head yesterday! K, G'luck mate, Bill

The APE 1000 kit has buttons so you may be in luck. MTC's.