SuzukiSavage.com - Carburetor small box

augh Ex Member	Carburetor small box 03/01/05 at 01:45:45 Me again. Sorry but I did not get the Clymer yet. What is the small black electrical box on the side of the carb (on the muffler side)?? It is not on the photos that I saw on this site and I can't undertand what it is. Tx Augusto.
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Kropatchek Serious Thumper Offline Why more than 1 cylinder? Posts: 1457 Alphen a/d Rijn Netherlands Gender:	Re: Carburetor small box Reply #1 - 03/01/05 at 03:04:30 These are microswitches. What I have read on the german forum these are only fitted to the EUropean bikes. The purpose is to control the ignition in 2nd and 3rd gear at full throttle. Your CDI, at the LH side behind the cover, probably has 2 connectors. Greetz Kropatchek
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Savage_Greg

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Re: Carburetor small box
Reply #2 - 03/01/05 at 05:26:32

Kropatchek wrote on 12/31/69 at 16:00:03:

These are microswitches.
What I have read on the german forum these are only fitted to the EUropean bikes. The purpose is to control the ignition in 2nd and 3rd gear at full throttle.
Your CDI, at the LH side behind the cover, probably has 2 connectors.

Greetz
Kropatchek Grin

A picture would be real good.....

And why would the European bikes need an ignition control in 2nd and 3rd gear?

And how would the "box" know whether the bike was IN 2nd and 3rd gear?

And why wouldn't there need to be ignition control in 1st, 4th or 5th?

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Kropatchek Serious Thumper Offline Why more than 1 cylinder? Posts: 1457 Alphen a/d Rijn Netherlands Gender:	Re: Carburetor small box Reply #3 - 03/03/05 at 02:25:01 Hi Greg Found the picture of the carburator with the switches: Its for enviromental purposes and indeed its connected to the CDI, the one with the 2 connectors. If you do not connect it to the CDI it works normal as on our bikes. Thats all I can find at the moment. Greetz Kropatchek
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carburetor small box Reply #4 - 03/03/05 at 05:38:06 Okay. Cool. Something new. Now, to "know" what gear it's in it would need something else. Or maybe it is only a control based on RPM. Is there something else connected to the shift drum that senses the gear selection? Like more wires along with the famous "blue wire" for nuetral?
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slavy Serious Thumper Offline smart cars for stupid people Posts: 710 Phoenix, Arizona Gender:	Re: Carburetor small box Reply #5 - 03/03/05 at 07:27:15 I am almost sure- this is TROTTHE POSITION SWITCH. In the original Suzuki manual You can find a schematic of the cable routing on page 12-14 , where it is said "exept for US". What it does- it retards the ignition if You have wide open trottle and low RPM /just imagine You are on 5th gear uphill/ , to avoid detonation.
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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Carburetor small box Reply #6 - 03/04/05 at 01:28:46 On our R6 engined sidecar racer we have throttle and cam position sensors, and fuel injection. Clive W
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Savage_Greg

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Re: Carburetor small box
Reply #7 - 03/04/05 at 05:18:07

slavy wrote on 12/31/69 at 16:00:03:

I am almost sure- this is TROTTHE POSITION SWITCH.
In the original Suzuki manual You can find a schematic of the cable routing on page 12-14 , where it is said "exept for US". What it does- it retards the ignition if You have wide open trottle and low RPM /just imagine You are on 5th gear uphill/ , to avoid detonation.

Okay, that makes sense. It doesn't really have anything to do with the actual gear selection. I suppose it is good in places where the octane levels in gas are low.

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slavy Serious Thumper Offline smart cars for stupid people Posts: 710 Phoenix, Arizona Gender:	Re: Carburetor small box Reply #8 - 03/04/05 at 05:39:56 The main reason is the polution.Detonation means very hot burning, witch means a lot of NOx in the exhaust gases.
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carburetor small box Reply #9 - 03/05/05 at 07:38:41 I was under the impression that some European gasolines can be very low octane too.
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Re: Carburetor small box
Reply #10 - 03/05/05 at 08:53:58

Actually no. The only country with extremely low octane gasoline available was USSR. This is the reason why all their motorcycles with 1 or 2 exeptions are so low performance- they are designet for 72 or 76 octane.
All the rest of the Eu. countries have better gas than USA. We are talking about 96 and 98 at the gas pump.
The only countries that I don't know of are the Nordic countries. I am sure somebody from there will make a coment about it.

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augh Ex Member	Re: Carburetor small box Reply #11 - 03/05/05 at 23:46:30 At this point let me go back to the initial subject, bacause it could be interesting. The butterfly of the carburetor has an external arm that hits a switch. The switch is only working when the butterfly is at his max open position. Could this have to be with a rpm cut ?? Or will modify the cdi box to better utilize the fuel??
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Savage_Greg Serious Thumper Alliance Member Offline Don't go around your ass to reach your elbow... Posts: 7844 SW Washington State Gender:	Re: Carburetor small box Reply #12 - 03/06/05 at 07:36:52 Maybe it sends a signal to the CDI to retard the timing a certain number of degrees. ???
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slavy Serious Thumper Offline smart cars for stupid people Posts: 710 Phoenix, Arizona Gender:	Re: Carburetor small box Reply #13 - 03/06/05 at 18:24:15 I don't know how the motorcycle CDI works - it is a matter of programing. The TPS is a variable resistor and the computer receives different voltage depending on the trottle opening. This is how the computer "knows" how much gas are You giving.
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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Carburetor small box Reply #14 - 03/06/05 at 18:52:40 My guess is that it tells the ignition when to chance the timing. I don't know if retarding the timing would be the right thing to do at full throttle, advancing the timing has always been a quick hop up. Now you have me wondering if there is a way to change the timing at the CDI box.
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