disk breaks front end option???

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An interesting topic. I personally rate the Norton disc and drum combo quite highly. People seem to rubbish the rear drum quite badly. Modern bikes with their squidgy suspension tend to put almost all their braking effort into the front brake because hitting it hard tends to cause the rear end to go very light with the transfer of weight. All the rear brake does in this situation is to steady the rear of the bike. ie, it is more for stability than actual braking. My X1 Buell has a monster 340mm disc on the front with a six piston caliper. A truly wonderful setup. Who needs two discs up front anyway? The rear single piston caliper is dreadful and wouldn't stop you if used alone. However, as a brake to stabilise the bike in hard braking, it does the job with no worries.

What you don't get with a Norton is anywhere near the same weight transfer as a modern setup, purely because of the short travel of the suspension. Hence, even though the front brake still provides most of the braking, the addition of some rear brake will add quite a bit of stopping power to the equation. My front disc is standard with a sleeved master cylinder and braided hose. Used alone, it is what I would call acceptable. Used together I find the braking power excellent. The rear used alone is only fair. I almost never use the rear brake on the Buell and I suspect that riders of modern bikes don't actually use the rear brake to stop, but more as a cornering tool to tighten lines and control wheelspin. If, of course they are part of the five percent of riders capable of using the brakes to anywhere near their capacity. The rear on a modern bike would provide maybe 10% of the braking power, where on the Norton it would be closer to 40% I suspect. I KNOW that when used in tandem braking efficiency is greatly increased.

Someone tell me I'm wrong.
 
I agree with Fullauto, my Mk3 is heavy, and has the front master cylinder sleeved and the 2 brakes used together are acceptable to good. No problem to pull up quickly. (but not in the same league as a modern)
 
Erik's design lowers the unsprung weight by having only 1 disc up front, I am sure you knew this already. That big disc and 6 pistons make for a healthy binder for sure, He has had some great idea's with his designs over the years, Can't wait to see his next street bikes. Ride safe guy's, Chuck. :wink:
 
Someone tell me I'm wrong.
Fullauto - I hobot- state for a fact that you are wrong, but only a little bit to me.

What you don't get with a Norton is anywhere near the same weight transfer as a modern setup, purely because of the short travel of the suspension. Hence, even though the front brake still provides most of the braking, the addition of some rear brake will add quite a bit of stopping power to the equation. My front disc is standard with a sleeved master cylinder and braided hose. Used alone, it is what I would call acceptable. Used together I find the braking power excellent.

1. Agree'd, normal Cdo are as stated, Excellent brakes with minimal mods, but some issues to plant the front to use full tire grip w/o rear swapping ends. Trixie brakes best as you say, Espeically on Loose-Slick Stuff. Basics is tap rear first to just squeal and with slight delay fast apply the front till its squealing max grip and feather the front grip as needed, right down to the speeds lock up is best. If Cdo rear is not essentially floating, there is more slow down still on tap - if you can keep tires inline. Peel's extra 2" fork travel allowed me to hard tap the rear which slams forks down 4" then before they rebound front brake forces them to stay down. Rebound was not upsetting if still rolling on let off, just reset to normal posture in one motion. Can ya imagine the advantage of tucking tail at same time as putting forks out like a big puppy dragged into a vet's clinic?
Ms Peel's rear link and 6" fork progressive travel made my SV650 on dual 27:1 ratio 320 mm + race rubber > very dangerous - as my normal commutes on Peel is to zoom up to blinds then 80% slow down till a clear view then zoom up again, SV would both stoppie or wheelie too easy unexpectedly going by the innate actions I did on Peel just getting along not in a real rush!!!! My SV would pull surprise stoppie at gas pull down testing, that both my Combats did in stride. Humphf same with '01 Ninja on race rubber. Got to be so damn gentle with them moderns I can't have my wild ways with em just for fun.


An interesting topic. I personally rate the Norton disc and drum combo quite highly. People seem to rubbish the rear drum quite badly. Modern bikes with their squidgy suspension tend to put almost all their braking effort into the front brake because hitting it hard tends to cause the rear end to go very light with the transfer of weight. All the rear brake does in this situation is to steady the rear of the bike. ie, it is more for stability than actual braking. My X1 Buell has a monster 340mm disc on the front with a six piston caliper. A truly wonderful setup. Who needs two discs up front anyway? The rear single piston caliper is dreadful and wouldn't stop you if used alone. However, as a brake to stabilise the bike in hard braking, it does the job with no worries.

2. I agree, moderns too damn tippy for effective braking. THIS IS the down fall of EVERY bike vs car race test, Modern bikes or vintage either, simply can not corner well enough so they ALL must serious brake before entry and can't, while the car can full brake routinely and also entry at way higher speed, so its only straight sprints the bike might catch up again. Ms Peel is at max acceleration before the first lean initiated into turns, so much so any excess lean = instant slip out, which is exactly what I want so the slight hi side kicks bike back up some for hook up w/o let off or any lose of momentum, just a darn instant reduction in acceleration, no stopping of acceleration, sheeze poor corner cripples, the lot of ya - risking life and bike for such little ittiy bitty gains in thril. NO SIR NOT FOR ME NO MORE NO WAY!
But Pashaw that is still mere ho hum phase two counter steering, the phase of mild daily commuting on safe reserves rates - Peel leave best elites in her wake after a single turn over 45" needed. I'm not interested in what ya see on race video, its counter productive, only hill climbs, ice spiked oval racers enter the other phases of handling where the real G's Force Joys Overwhelm
2a. The 5% riders who use brake to assist turns are either on wimpy cycles that can't power tire spin or wussies on wimpy cycle chassis-tires, as no way in physics can slowing wheels turning get ya through a turn funner-quicker, hehe, I know too damn well what rear brake is for in maneuvering and that ONLY for recovering a low side or preventing faster entry by kicking out rear to add drag and spin about the front patch as pivot. [I'm a wuss on wimpy bike too ok]

2b. Above by brake or by power slide, is the transition into next phase change of handling physics, controls reverse like a plane thrown in a spin, stunt pilots know this and learn to anticipate it - but boy howdy air frame better be G's rated enough. Ms Peel/s is. The faster you go the slicker the surface becomes and is one reason I want a shift pointer in rain or on Grit, to know if I can power out of a crisis or must brake rear out and around or miss my turn. Surprise rain grease slicks or dry thin sand sections surprises trained me when nothing to lose but go down anyway. This is where the state of mind matters so much to do or die - as goes against all innate sense of survival reflex.

The rear used alone is only fair. I almost never use the rear brake on the Buell and I suspect that riders of modern bikes don't actually use the rear brake to stop, but more as a cornering tool to tighten lines and control wheelspin. If, of course they are part of the five percent of riders capable of using the brakes to anywhere near their capacity. The rear on a modern bike would provide maybe 10% of the braking power, where on the Norton it would be closer to 40% I suspect. I KNOW that when used in tandem braking efficiency is greatly increased.
3. Modern and ancient big cruisers often use rear brakes for effective stops. Moderns sport bikes just seem too front end heavy to take much whoa. I've read that the front mass bias it becuase they can't go through turns under much power so they have to depend on dangerous front traction, which is being lifted out of traction the sharper you turn -even w/o throttle-, so makes for poor braking, like "desperately" trying to enter turns slow enough they can handle it, so too darn boring for me to aspire to mimic in any way.

3. Norton rear drum is a great brake, about perfect, can lock up anytime but takes some on purpose pressure so easy to modulate. Its helpful on slick steeps to slightly drag rear because front would slip out on any brake force. It allows a fun stunt I do on Commando's to show off. Zoom off to top of 1st and catch 2nd a bit then down shift for over run sound till about 30 mph then lock rear up for smoke as bike slides total upright at a skewed angle kinda sideways following the straight steering front tire. Done well its like a car pulling into nose-nose parking slot by drifting in pretty as you please obliquely.

Big deal in Norton or any brake is getting the spinning mass down as thats as much or more lb force than bike speed to slow up.
disk breaks front end option???
 
Fullauto said:
What you don't get with a Norton is anywhere near the same weight transfer as a modern setup, purely because of the short travel of the suspension.
Someone tell me I'm wrong.


The riding position would have a lot to do with weight transfer wouldn't it?, as in std trim the rider doesn't really exert any weight on the bars,well not as much as a modern bike any way
 
Thanks Steve, but I don't ride my Commando like you do. I really think I understand a lot of what you say and I would love to see you stick it to the youngbloods on their "ultimate sports bikes". I think bikes have developed over the years due to inputs from marketing people and customers with no experience and confused ideas of what they require of a true road bike. Thus we have what is marketed today. I find the same in firearms. The market is dictated to by journos and potential owners who know nothing of how it really works in the real world. Hence, ultra powerful rifles with ultra high power variable scopes. Back to bikes, even the traditional makers of cutting edge real world road bikes like, say, Ducati, base their bikes on what works on the race track and potential owners wet dreams. They are not something, however that is a long term, real world bike. It's something to ride for an hour or two on a Sunday morning to impress your mates and anybody else and put it back in the garage because you don't want to run up the miles because of the expense of servicing.

I don't run my Commando really hard because I enjoy a more relaxed atmosphere and it was made for the real world. In this situation, the brakes work well for me.
 
Splatt, it does indeed, but in comparison it's the vast difference in suspension travel that makes the difference. Try and do stoppies on a Commando. I'll come and pick up the broken stuff for you.
 
My sphincter will not allow me to do stoppies, but my front brake will get the back wheel in the air bouncing down the road, thats when I find the back brake most usefull
 
Yoose guys get me so high seeing the scope of endeavors plua my flashbacks on telling tales. Fullauto has basically one meaning to red blooded American boy, ratta tat tat... I get to shoot a lot out here but never eat what I shoot.
[video]http://www.youtube.com/watch?v=fR1Ro3FQpqY[/video]

I really truly had no intentions desire expectation to be a hot shot hooligan rideer, it forced on me learning how to merely get out to pavement. I'd ask the riders at local shops and they all instantly dropped eyes to floor they began scratching with boots to change subject until some wise one would spout out -Trailer IT!. I crashed about each trip out. A number of times, all suited up idlihng, just couldn't face the un-learnt risks so tucked tall - un-sutied and took a cage. Ever been that afraid to ride, I have too many times. I'm not brave - just forced into berserk actions of nothing lose. I have great fear of steering with front or having the front take over the steering like an out of control rudder.
Also have avoid dozens of rides as too scared of deer, first time after goats I thought I wanted to ride, 3 days ago, almost lost it in car dodging instant deer tracer shot at headlight. I used to love to ride after dark.

THE Gravel teaches All there is to know about riding. Tarmac is child's play no matter how loose and sliding you see racers, just fun looking luxury relief of chassis loads to me, a lark I look forward to on a track someday on Peel. But wide slides, a la flat tracker ain't keeping hill climber dragster thrust back in seat wrists strained as a water skier the whole way around. Its merely a bit of extension of phase 2 ordinary handling, me and everyone else mostly rides within.
Someday when I get more comfortable revealing riding phenomena I'll review my Ricochet Rabbit Riding Ranch and Rife Range. IF someone can get to the peak of the Gravel Breast Mound they get a pin, if they can beat Peel they get a tattoo. Hardest part of the course is the braking tests, with water hazard crash or drop off, if not up to full bike potential. If you ain't scared while maneuvering to max you ain't doing the max braking to stop in time and matter can not exit in same place at same time.

Norton Brakes are both quite capable to work tires to max, just takes a bit more grip than moderns, but that is built in safety device. I practice brake squeals at 100 mph, Wonderful ABS like max effect. Oh- makes my teeth to toe nails hurt but I've get going that fast now and then and have surprises in time only a full effort slow down can prevent a collision or give reserves to maneuver around. BTW ones first reflex on in your face hazard, like a deer or tree fall or car pulling out is to steer first brake 2nd.
Even corner crippled bikes can take a spike steering to dodge stuff, but recovering afterward can get hectic, but at least you are still in the fight and now under wheels. Tri-linked Peel has no recovery-chassis settling states, she does one action releases w/o rebound-ringing. I ride her front locked for bikes lengths for gosh sakes, ever see that in stunt shows. If I let up for 10% slippage I get thrown over the bars or can't keep 1" high lifting rear inline while resisting being thrown over bars for all I'm worth. Maybe steering damper will allow a l show stoppie some day, but can't fool me on what give shortest stops.

I now know that a lightened Commando with spiffed up Combat engine and tri-linkage is the best tool there is to spank other motorcycles, just the 4wd drift cars and karts may give Peel a run for the money. Yet they can't spike the traction reactions Peel can nor use frame unwrap to sling shot for max acceleration at loosest spots in turns, Peel can. Sorta like a sail boat boom flashing over head with a bit of rudder change, way faster than a human could move it, all humans can do is duck and hang for the acceleration that comes soon as wind fills sail again. I don't know what I like doing best on Peel, side ways wheelies or trip out with power to hi side out of there or never let tire quite hook up for a burnout upright straight steering turn. The last way is the fastest and I can practice the line in cages as identical to their behavior, not other cycles. Get going as fast as Peel likes and brake have not concept of slowing just changing bike angle up or down, or to allow a pivoting sharper than forks range allows.

Here's my refreshment to empty last rds after shooting a unused gas pipe out of the road bed and pasture hollow. .308 M1A1 type clip feed. Sometimes haul out the M1Grand tanker so Wes can help chip out a driveway rock head, pling as clip jumps out on 8th rd like John Wayne movie : )
[video]http://www.youtube.com/watch?v=1onX3PlCfR8[/video]

Oh yeah, the fastest way to stop w/o impacting is to lock both tires and throw bike sideways like a snow skier staying on bike to keep it down and control balance to avoid rear swinging ahead to far leaving sparks on frame rail. If bike is going to hit some thing like trees still as some speed, hop up on top like a spider keeping fingers-toes out of spokes and chain so bike hits tree w/o you in between. Time slows down in states that induce desperate acts, if you act first.
That must be done voluntarily, not thrown down accidentally, Any ID what might cause a pilot to choose doing that vs less harsh alternative>?
 
Going back to 6 pot calipers.
The advantage you get is that there's no need to sleeve the master cylinder, the ratio works out pretty well keeping it stock.
The disadvantage if you could call it that IMHO it's aesthetically the ugliest and least in keeping with a 70's bike (pic is of mine).

disk breaks front end option???


On the fork travel line, Roadholders have pretty similar travel to most modern bikes, there's plenty of discussion on that elsewhere, they just don't use what they've got unless you're two up with full luggage.
Change the springs and dampers and you start to get a bit of movement and a mass transfer. Brake feel is very subjective linked to the brake suspension interaction. Take modern bike with a good brake setup, stiffen the suspension up and suddenly the brakes seem wooden. Suspension and brakes need to be treated as a package.
 
splatt said:
Rich, does you disc sweep the whole brake pad???

Question wording ia bit confusing.
The pad is narrower than the disk leaving the unused (rusty) disk area on the inside diameter, I could machine the excess material away just haven't got around to it.

In theory it means the effective diameter is increased = more brake torque.

I much prefer the look of a standard caliper, would like to try a standard disk and caliper with sleeved master cylinder to see if I could live with it.
 
I agree, Norton vintage accent flavor is lost removing the sculptured Lockheed caliper and adaptor plates look so scabbed on extra mass complexity. Here's Peel rewelded and ground smooth slider mounting for larger OD floating wave rotor.
I only hope it works as well as prior mostly factory brake.

disk breaks front end option???
 
It took a over a year watching ebay and googgling to find lightest rotor in diameter I could reasonably adapt by welding slider mount. Norton plater is ~190 mm OD, most modern front rotors are 320 mm. Peel's is 220 mm. New these waves cost like $300+.
I lucked out on ebay, ~$150, so will power and prayer and luck is how I found mine but at least we know they exist. Most you will find are too small MX bikes or too big sport bike all out racer scale to fit mere Commando Roadholder scale. I was getting pretty discouraged. Peel weighs like 1.5 lb now compared to stock ~6 lb or $120 bux to lighten stock to ~4.5 lb cast iron flywheel.

Tricky to get 7971 TS alloy adapter made to mate to hub. To assure proper alignment I set up master cylinder mounted on a tube and tapped brake lever back to hold caliper clamped on rotor mounted in nipped up forks-hub, then bolted on caliper parts of adapter plate and had welder fill in gaps to attach to slider. Then my forte kicked in, grinding wheel and sand paper machinist. Then laced rim on. Hub rotor caliper is a separate fixed alignment from rim centering in forks. Definitely feel the difference picking up Peels front compared to factory Trixie's. Not weighted on scale yet.
 
Rich_j said:
splatt said:
Rich, does you disc sweep the whole brake pad???

Question wording ia bit confusing.
The pad is narrower than the disk leaving the unused (rusty) disk area on the inside diameter, I could machine the excess material away just haven't got around to it.

In theory it means the effective diameter is increased = more brake torque.

I much prefer the look of a standard caliper, would like to try a standard disk and caliper with sleeved master cylinder to see if I could live with it.

I was refering to the outer edge it lookk like the pads overhang the disc
 
ludwig said:
What I don't like so much about the brake upgrade kits from Norvil , CNW ... are these adaptor plates .
If you use a 12" disk and a 4 piston caliper with bolts 40 mm apart , you can fix the caliper directly at the slider .
It is more compact , less clutter and it wil clear the lower fender stay if you want to use one .
It looks more like it ' belongs there' than like something 'adapted' :

disk breaks front end option???


Have you cut the caliper mount down on the slider?? probably not an option for most.
 
hobot said:
I agree, Norton vintage accent flavor is lost removing the sculptured Lockheed caliper and adaptor plates look so scabbed on extra mass complexity. Here's Peel rewelded and ground smooth slider mounting for larger OD floating wave rotor.
I only hope it works as well as prior mostly factory brake.

disk breaks front end option???


Hobot, you wouldn't be able to show me a picture of what looks like a fork brace in your photo could you.
 
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