Using Norton calipers on both sides?

Er Um ,



FROM jpn-750-commando-t14854.html

Interesting.
I have never seen that dual ap Lockheed caliper setup forward and behind sliders before.

'Which brings me to the question, Why would you want to add the weight of another lockheed caliper and disc to the unsprung weight of the wheel? Wouldn't it be better to get a single sided, lightweight, high tech, modern disc and caliper to save weight AND get better braking power?'

Speculation ? or are you talking about a 4 spot calliper with a cast iron disc ? All is not as simple as it might appear. When I race, I usually do it with three fingers and a thumb wrapped around the twist grip operating the throttle and my forefinger operating the brake. That way I get the gear-changes right on short, tight circuits. The master cylinder is intended to operate ONE AP Lockheed calliper, I have it working TWO. If you did this on a road bike, you would probably neck yourself. A single disc might be enough for a road bike, but not on a racer. Perhaps the objective in fitting dual discs to a road bike is appearance ?

Just tripped over one in vivid tecnicolour . Tony rutter aboard .



Put 78 norton in Google pics ! . BAHH . Think the Norvil Sliders come in R & L , these days ( Calipers are lighter )



Wonder if economics have Ducarti / MZ 250 front ends at a more affordable level , as its sortta pukka .

norton-t15430-30.html



DONT LOOK BEHIND YOU ! .

A Uni Type Had a Twin Disc Tri Front end fall onto his Commando , in days of yore. I think it was blue . :wink:

One of madass'

One of madass'

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Is that for the Salt Lakes , or are a few of these Riders putting on a bit of weight . Seems a bit overkill , Not entirely ' Trad ' , if ' with it ' and Lt wt . :?
Should lock it up at 160 mph no trouble , there .

Matt Spencer said:

One of madass'

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Is that for the Salt Lakes , or are a few of these Riders putting on a bit of weight . Seems a bit overkill , Not entirely ' Trad ' , if ' with it ' and Lt wt . :?
Should lock it up at 160 mph no trouble , there .

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I have a 320mm single disc a 4 pot nissin calliper ,it works well but when 2 up and loaded with camping gear I could use a bit more braking power,so I will be adding another disc and calliper to my bike, the better the brakes the faster you can ride cheers

o0norton0o said:

.....Which brings me to the question, Why would you want to add the weight of another lockheed caliper and disc to the unsprung weight of the wheel? Wouldn't it be better to get a single sided, lightweight, high tech, modern disc and caliper to save weight AND get better braking power?

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One answer would be if you rode two up in mountainous areas where the brakes could tend to heat up, then the extra rotor might be worth the weight.

cjandme said:

o0norton0o said:

.....Which brings me to the question, Why would you want to add the weight of another lockheed caliper and disc to the unsprung weight of the wheel? Wouldn't it be better to get a single sided, lightweight, high tech, modern disc and caliper to save weight AND get better braking power?

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One answer would be if you rode two up in mountainous areas where the brakes could tend to heat up, then the extra rotor might be worth the weight.

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Coming down Pike's Peak, they stop you and aim a temp gun at your brakes. If they are hot, you are instructed to pull over on the side and let them cool. Most bikes pass without a second look.

I would be leery of overloading the front forks, the steering head and the top tube in a hard braking situation. Even a single disk set-up generates a lot more load than the improved drum brake. The top tube is vulnerable to buckling because of its diameter/wall thickness ratio.

frankdamp said:

I would be leery of overloading the front forks, the steering head and the top tube in a hard braking situation. Even a single disk set-up generates a lot more load than the improved drum brake. The top tube is vulnerable to buckling because of its diameter/wall thickness ratio.

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Frank,
Haven't we been here before? original-upgrade-t20592-30.html#p267128

You'd left before Ken Sprayson corrected the original frame weakness and people have been fitting large single discs and double discs to Commandos now for many years without any apparent detrimental effects.

Brake disks are also known as "heat flywheels" or heat sinks, so the additional disk will delay brake fade; very important in racing, nice, but not quite as necessary for the street, unless you find yourself on tight roads in the upper end of the tach most of the time or if you run heavy with passenger/gear.

I would never say that you can have too much brake, but as others have mentioned its a quality-of-braking thing; nice to feel a set of quality pads add progressive braking force, also good to notice when the braking force trails off and fade begins; time to think about some cool down time.

I like less un-sprung weight so a good quality single disk front brake will always win my vote (for the street), all else being equal.

You're absolutely right, L.A.B. The Commando is probably fine in its present version.