Author Topic: Gerex 2 ignition (Read 11515 times)

Retro Rocket · « **on:** March 24, 2012, 12:20:34 AM »

I was going through the bat cave today and came across some very cool stuff, some old RC catalogs and a very comprehensive Yoshimura catalog with full tuning instructions for the CR31's {tickler type}, it also contained a Moriwaki catalog and some action 4's stuff, i also found the fitting sheet for the RC 315 cam thats in my drag engine. At the bottom of the box was a Gerex ignition box with instructions, can anyone tell me anything about the Gerex..?

Terry in Australia · « **Reply #1 on:** March 24, 2012, 02:40:54 AM »

G'Day Mick, I replied to your PM but I thought I'd kick your thread along too, I've got a Gerex ignition in my garage for a GS1000 Suzuki, it came off an RC GS1000, Russ had come a long way since the CB750 Cobra engines and was using some good US made aftermarket stuff by 1980.

The "Multi-Spark" or "Multi-Fire" ignitions were very expensive compared to Dyna's and Marteks, and that's what killed them, but I believe that they worked well, mine came from a running bike that the original owner was restoring, but the ignition had lasted 20 years when I bought it, so I'm sure that yours will be a goer too.

The only thing I'd say against them is that there are a lot of parts and brackets etc, and they probably don't work any better than the Dyna's or Marteks of the same era. Cheers, Terry.

Retro Rocket · « **Reply #2 on:** March 24, 2012, 03:09:24 AM »

Thanks Terry, i found some funny brackets as well, now i know what they are for. I have the instructions with it so i'll have a read and see how it all works....

scottly · « **Reply #3 on:** March 24, 2012, 07:43:30 AM »

That's the ignition I have, Mick. Works great!!! (I don't think it can be compared to Dyna or Martek, as it is a CDI)

Jerry Rxman Griffin aka MuthaF'er · « **Reply #4 on:** March 24, 2012, 10:32:44 AM »

I have a NOS Gerex in my basement but don't know a thing about it.

Terry in Australia · « **Reply #5 on:** March 24, 2012, 01:52:58 PM »

Quote from: scottly on March 24, 2012, 07:43:30 AM

That's the ignition I have, Mick. Works great!!! (I don't think it can be compared to Dyna or Martek, as it is a CDI)

I've got one sitting in a box that I was too frightened to install on my GS1000 Scott as it runs puuuurfectly with the NOS Martek 440 and new 3 Ohm Dyna coils, but you know more about them than me, what is the Gerex's biggest advantage over Dynas and Marteks? Cheers, Terry.

NickO · « **Reply #6 on:** March 24, 2012, 03:34:18 PM »

Hey Retro,

Any chance you could scan the CR31 set-up manual and let me have copy? I would really appreciate it if possible!

Thanks.

Nick

Retro Rocket · « **Reply #7 on:** March 24, 2012, 03:39:02 PM »

Quote from: NickO on March 24, 2012, 03:34:18 PM

Hey Retro,

Any chance you could scan the CR31 set-up manual and let me have copy? I would really appreciate it if possible!

Thanks.

Nick

Hi Nick, i can do that for you mate but you'll have to wait a little while, i am moving house and, believe it or not, my scanner died last week...

I have a friend that will do it for me so as soon as i can i will do it for you. I plan on scanning everything i found ......

Retro Rocket · « **Reply #8 on:** March 24, 2012, 03:41:15 PM »

Quote from: scottly on March 24, 2012, 07:43:30 AM

That's the ignition I have, Mick. Works great!!! (I don't think it can be compared to Dyna or Martek, as it is a CDI)

Hi Scott, i have the control box but can't seem to find the ignition plate, is there any other plate that will work, Dyna maybe.? Do i need the Gerex coils.?

Terry in Australia · « **Reply #9 on:** March 24, 2012, 03:59:23 PM »

I'll pull mine out of the box and take a pic and post it if you like Mick? I don't think the plates are interchangeable with anything else. Cheers, Terry.

Terry in Australia · « **Reply #10 on:** March 24, 2012, 04:15:18 PM »

Here's an old thread I was searching for Mick, with lots of info, including Scotts 40-50 foot burnout!

http://forums.sohc4.net/index.php?topic=10137.0

Retro Rocket · « **Reply #11 on:** March 24, 2012, 04:16:59 PM »

Quote from: Terry in Australia on March 24, 2012, 03:59:23 PM

I'll pull mine out of the box and take a pic and post it if you like Mick? I don't think the plates are interchangeable with anything else. Cheers, Terry.

I have another box of stuff somewhere, i am hoping to find more bits there hopefully.... I would like to see a pic of the control box to compare to mine.... Thanks mate.

Terry in Australia · « **Reply #12 on:** March 24, 2012, 05:00:36 PM »

No worries, I'll go out and take a pic shortly.

scottly · « **Reply #13 on:** March 24, 2012, 06:55:46 PM »

Thanks for linking that thread, Terry. Mick, prior to installing those KV coils, I used the stock coils. Do you have the pick-ups and the rotor? The plate itself would not be too hard to fabricate.

Terry in Australia · « **Reply #14 on:** March 24, 2012, 07:20:10 PM »

Here's the pics of mine Mick, I don't know if it's a "1" or a "2", but I'm guessing it's a "1". Cheers, Terry.

scottly · « **Reply #15 on:** March 24, 2012, 07:30:10 PM »

That looks like a 2, Terry, since the wires exit the end of the box, instead of the back. Maybe it's a down under thing, but mine has the wires on the other end of the box. PLEASE check the resistance of the Gerex coils!!!

Terry in Australia · « **Reply #16 on:** March 24, 2012, 07:35:50 PM »

Quote from: scottly on March 24, 2012, 07:30:10 PM

That looks like a 2, Terry, since the wires exit the end of the box, instead of the back. Maybe it's a down under thing, but mine has the wires on the other end of the box.

Maybe they put the sticker on upside down Scott?

Quote from: scottly on March 24, 2012, 07:30:10 PM

PLEASE check the resistance of the Gerex coils!!!

I think they're marked 1.2 Ohms mate, is that what you need? Cheers, Terry.

Retro Rocket · « **Reply #17 on:** March 24, 2012, 07:37:38 PM »

Quote from: scottly on March 24, 2012, 06:55:46 PM

Thanks for linking that thread, Terry. Mick, prior to installing those KV coils, I used the stock coils. Do you have the pick-ups and the rotor? The plate itself would not be too hard to fabricate.

I have some more boxes of stuff thats packed away Scott, i'm in the middle of a move, so when i get sorted i will have a look.

Terry, my CDI box is red and has GerexII on the side of it, it is about the same size as your box though.

Retro Rocket · « **Reply #18 on:** March 24, 2012, 07:38:44 PM »

Hi Terry, i just read that link you posted, i have all the installation instructions with this as well, i just need to find that other box and see if the rest is in it....

Terry in Australia · « **Reply #19 on:** March 24, 2012, 07:46:34 PM »

No worries Mick, the big bracket is so you can mount the box on the outside of the bike, I think mine was mounted on a frame rail under the seat. Cheers, Terry.

Retro Rocket · « **Reply #20 on:** March 24, 2012, 07:50:20 PM »

If i can use it i will make room between the battery and the oil tank, i am going to use a smaller battery so i'll modify the battery box and stick it there....{if i use it}

Retro Rocket · « **Reply #21 on:** March 24, 2012, 07:51:12 PM »

If anyone see's a pickup plate with pickups for sale, let me know...

Terry in Australia · « **Reply #22 on:** March 24, 2012, 07:54:13 PM »

I just did an eBay search Mick, but got no hits. I think you'd need to mount the box out in the airstream mate, I've got a feeling it'd need to be kept as cool as possible. Cheers, Terry.

Retro Rocket · « **Reply #23 on:** March 24, 2012, 08:01:20 PM »

I thought about heat, i have some small ducting tube i was thinking of using to put more air into the airbox at speed, maybe i can use some to direct air over it....I'll work something out....

scottly · « **Reply #24 on:** March 24, 2012, 08:11:15 PM »

From the instructions: " If a fairing is installed, be damned sure that a free blast of air passes over the C-D unit..." Gerry had a sense of humor.

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Author Topic: Gerex 2 ignition (Read 11515 times)