2 MC Capacitor

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pierodn

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Hi,
and happy new year.
The pre 1971 wiring diagram says 2 MC Capacitor, the later 1971 on says only CAPACITOR.
There is a difference?
Ciao.
Piero
 
No difference but do not use old stock but a modern replacement, capacitors age and die. My original is working but I have a replacement ready and waiting.
 
Its not needed if not running contact breaker or electronic ign *without a battery* installed and ya keep rpms up enough 2000ish I've found. Think of this item as a small extra battery in line to fill in voltage flow between spikes of alternator volts > w/o a chemical battery installed. A good 2 MC can store energy enough to fire a boyah plugs when keyed on or a bad connection bumped so if in gear on tire can bump off a stand or pinch a probing finger.
 
A good mc is key here. Most of these blue cans are ancient and dried up and no longer hold enough juice to get you up and running in a battery crisis. Modern eqivalents or better can be fitted or option 2 is eliminate it and just pay attention to battery strength and health.
 
I have a modern one on my B44, returning one night from a club meeting the bike stopped dead, battery had gone high resistance. Took the fuse out and the bike started one kick with boyer digital ignition, so I am sold on fitting them to all bikes, just need to remember to turn the lights off before kicking. Bump starts work as a last resort.
 
Well,
Two question:
1. what does it means MC;
2. What is a good modern capacitor e where i can buy it.
Ciao
Pieo
 
Hey Kommando,care to clue us in as to make and model of this modern equivalent that got a Boyer up and running during battery emergency ?
 
If you use a "Boyer PowerBox" as your regulator/rectifier and you are using it with a battery .You can start a bike with a dead battery by removing your fuse and kicking or bump starting the bike....then put the fuse back in line. I've had to resort to this more than once. BTW the Boyer PowerBox is a fine product IMHO.....Skip
 
Yep they will and a lot smaller $ize too than the bank of 1 million mFarad's I had [oil can size] for the excessive sharp spikes of 15" subwoofer hits no battery with 000 cables could release in time. Would weld and explode flesh if not careful to handle or bleed down slow by good resistor in shorting wire. Of course could hold out for a super capacitor coming of age now. Heheh I had pro's that did stadium and theater systems and contests sit in my Ole Blue Millenium Falcon Van stating wide eyed they'd never had such fidelity bypassing ears, so they and all others nick named the system "Bone Conductor".
 
MC2 probably means 'motorcycle capacitor #2'. Any capacitor of a large value say more than 50uF should work fine. If Radio Shack were in Italy you could probably find one for $5. The audio cap is plenty overkill. Voltage should run 20 V or more. The more uF the better, not that you will notice though. I think Pazon recommended removing it and if it's original, it's most likely bad. A battery actually acts like a large capacitor too.
 
If not finding a single one big enough, like some stereo's, ya can gang em up wire in parallel to ya do. Our ignitions may never even reach 5 watts draw at once to fire a plug so likely don't even need as large as Norton MC2.
 
There is one that is just the right size to fit the spring and capacitance value. It was even blue. I got it from Mouser. Need to look back and see what I did. Bike is sitting in a storage unit so can't look at it directly at the moment.

No it is not really necessary to have but that's the way I wanted my bike to be (to quote pete v). I was able to start it without the battery with the old Boyer and also the Pazon Altair on there now.

Edit - Found it. From Mouser Electronics – Vishay 5600uF @ 50V. It had screw terminals and I found some right angle terminals to mate with the existing connectors. Looks like it is no longer available from them and the price went way up. Get approximately the same value and from fresh stock if possible. Electrolytic capacitors are usually date coded. Need to observe correct polarity (+/-) also.
 
DogT said:
MC2 probably means 'motorcycle capacitor #2'. Any capacitor of a large value say more than 50uF should work fine. If Radio Shack were in Italy you could probably find one for $5. The audio cap is plenty overkill. Voltage should run 20 V or more. The more uF the better, not that you will notice though. I think Pazon recommended removing it and if it's original, it's most likely bad. A battery actually acts like a large capacitor too.
Click to expand...

Hi Dave and happy new year.
I have the Pazon on, where you read that Pazon raccomended to remove the capacitor.
Should I remove it?.
Ciao.
Piero
 
I bought mine off ebay in the surplus electrical items, 10,000 micro farad and 30V rating with 2 screw terminals, bigger than the original.
 
Maybe I was wrong about Pazon and the MC2, I know they say to remove the point condensers though.

Dave
 
The blue can is merelly like a tiny storage battery and only gets charged to same volts as regulator allows to the chemical battery so should not matter to electronic ign. if a Lyden Jar is only thing holding a charge between charger spikes or a chemical corrosion battery w/o the charger working. If no contact breakers to stifle their aching then no condensor caps needed and removed with the points plate.
 
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