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Easy-X |
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Easy-X Super Spammer
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Triton Thrasher |
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Triton Thrasher Could Be A Chat Bot
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stinkwheel |
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stinkwheel Bovine Proctologist
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Bhud |
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Bhud World Chat Champion
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Posted: 23:16 - 21 Oct 2019 Post subject: |
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It's funny - I've been looking into hardtails myself.
You can get the bike to sit very low, which, depending on the type of bike, can look a lot cooler than with shocks. It's the original form of motorcycle, because originally, all bikes were hardtails. The WW2 BMW R75s are all hardtails, and mechanical works of art. Urals kept that rugged look going for decades afterwards. In most other cases, it was made obsolete by manufacturers moving to rear shocks.
In the case of my currently-in-the-pipeline project, it's (potentially) also a way to deal with a galvanically corroded swingarm pivot bolt which just won't come out no matter what. This is because any bike can be hardtailed by replacing the rear shocks with struts, although the more usual way is to fit an extended welded-on rear frame.
There are mixed reviews on how hardtails ride. In general, people say they ride poorly. Quite a few people say they're really awful to ride, and cause back injuries. A minority say they can be sort of OK, as long as you push down on the pegs and lift off the seat as soon as you see a bump. Very early classic bikes (such as 1930s Indians) had a very carefully sprung (forward and back) and large, very soft, seat, to make up for the rough ride. They also had long rubber stretchy "reins" attached to the end of the handlebars, to let the front end wallow over rough terrain. The idea was probably to let the bike wander and waft around beneath you as you went down a dirt track (roads were bad) in a straight line at about 30-40mph. |
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Polarbear |
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Polarbear Super Spammer
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Easy-X |
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Easy-X Super Spammer
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Teflon-Mike |
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 00:33 - 22 Oct 2019 Post subject: |
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A lot 'old' bikes from before the 1950's had no rear suspension, cops it was easier & cheaper to build that way and before the Girling gas/oil damper, suspension was crude anyways.
These 'old' bikes were the earliest candidates for chopperisation, in the 1950's, cos old, old fashioned and cheap, hence the 'easy-rider' look given to cruisers.
As an aside, the chopper fashion, starting in the USA, started most often with poor unsuspecting Triumphs, BSA's and Enfields etc. as Brit-Bikes were exported over the pond by the bucket-load to help get in $-Cash top repay the war-debt, and UK manufacturers that exported to the US got exemptions on the rationing/ministry of supply restrictions that dogged other industries. Treated with more than a little disdain in the US by existing bike shops, rather like chinky 125's have been here for the last 2 decades; US owners struggled for support to keep these 'imports' running, they looked at UK DI|Y mags.
In the UK the sport of 'Trials' was popular, as the tarmac machine spread tar on most, then un-made gravel or dirt tracks, and 'pool' 2* petrol limited the scope for engine tuning for both factories and amateurs alike. With the lets get together club mentality left behind by WWII and the ideals of consumerism spreading, Motorcycle 'trials' was, like car rallying, an 'every-man motor-sport, the average chap in the street could have a crack at. All you needed was an old army surplus dispatcher bike, strip off the heavy pannier rack, and when they got bent, replace the steel mudguards with some aluminium hammered from a bit of Lancaster bomber wing littering some-one's paddock, and you were on your way to making, a 'Trials Chop', as in a bike for trials with all the unnecessary bits 'chopped off'.
Significant bit is, that as the tarmac spread, the 'roads' used for trials events started to a) dissapear and b) get tamed; leading to the vogue for 'pocket trials' held on short technical sections on folks farms and stuff. This lead to the separation of the sport into what is now 'Enduro', an off-road 'race' and 'observed-section' trials, that is more like the modern sport, at walking pace over obstacles.
But, the 'CHOP'; came about as folk trying to make a standard road bike more competent on the rough started to cut the frames to shorten the wheelbase and steepen the steering angle to make them more nimble 'off-road'.
This was what was described in the magazines that crossed the Atlantic, where the 'mericans did the same thing, but backwards, stretching frames and raking fork-angles to make the high-way cruiser of Easy-Rider renown, and the term 'Chopper' got switched from the builder, who 'choppped' bikes for sport, to the bike itself.
HARD TAILS! The chopper vogue was still fairly strong in the 1970's and 80's, but as a style icon rather than sporting device. Customesers of that era were much more likely to try 'porting' a Japanese two-stroke for more speed, and/or doing something devious like fit a Metamachek swimg arm and mazzoci shocks, or just stick the usually pretty decent Niponese engine from a crashed and bent CB900 or Z1 into a fancy 'Kit' frame like a Harris, Spondon, or Bimota... the 'hard tail' became the tool of the die-hard hells angel type, who could make their own 'rigid' frame in their garage from scaffold pole with a gas-axe, and the virtues of simplicity offered opportunity fore a more successful DIY build.
The expedient of using solid-struts to replace` clapped out twin-shocks, was then a low rent way to go rigid and go 'chopper', on the cheap, and post `1990's UK restrictions on registration and approval, was, and still is, an expedient to create a suspensionless 'chopper', without cutting the actual frame, and running into the SVA restrictions to get a number-plate.
So ways and ways-about... hard-tail, as in no rear suspension, could some, as standard, from old bikes built before practicable hydraulic dampers, or could be from solid strutting a standard twin-shock road bike, OR from constructing a totally rigid replacement frame, with more or less cost/MOT/SVA vexations, but usually to ape US inspired 'Cruiser' looks, rather than for any performance benefit, most hard tail customs shun for that 'look'. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'
Last edited by Teflon-Mike on 00:38 - 22 Oct 2019; edited 1 time in total |
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WD Forte |
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WD Forte World Chat Champion
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DUCAUDI |
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DUCAUDI World Chat Champion
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ThatDippyTwat |
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ThatDippyTwat World Chat Champion
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Teflon-Mike |
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 06:48 - 22 Oct 2019 Post subject: |
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Tuberculosis wrote: | Is a hardtail another term for a bobber? |
'Jargon' is so often applied so indiscriminately and inaccurately... It COULD be... but.. more conventionally, 'bob' just means short, like a woman's hair cut 'Bob'. Applied to bikes those early 'Trials Chops' I mentioned were often 'bobbed', to shorten the wheel-base, most usually by cutting out the rear drop-out plate the back-wheel-axle bolts through, and welding it back on an inch or two further forwards on the frame cradle.
Incidentally my own 1981 Montesa Cota competition trials bike had it's wheel-base shortened this way, the forst owner chopping the drop-out plates off the swing arm and welding them back on an inch further forward... took me twenty years to discover that! When former owners son, spotted it on the web, and sent me an e-mail... explaions a few things that duz.. like why drive chains were about five links too long, and why I had a habbit opf looping the fcuker on steep climbs... though that may just be me being crap!
Back sort of on topic though, more conventionally a 'bobber' is when the seat rails have been abbreviated or lopped down, usually just behind the top shock mounts if a T-Shock to avoid any MOT/SVA contention. Done when modding for cruisery style, and a long two person 'duel-seat', thrown away oft for a sprung solo push-bike saddle, again mostly for the aesthetic rather than any practical reasons, especially any performance related ones!
SMALL SIDE NOTE: 'Suspension' is over-rated! Proving the Luddites point in trials, probably 15 years or more ago, I thought I had done pretty good on one event I actually took my 'class' in... only to look more closely at the results, and spot that the chap that had won the 'Rigid' class for suspension-less old dinosaurs, had not done so 'cos he was the only idiot mad enough to try riding something with no springs up a river-bed, BUT he had actually got fewer penalties, not only than me in the T-Shock class, but most folk in the old iron Pre-65 class too! Just to add insult to injury Chap was more than twice my age too! He was in his 70's! And this is 'off-road' where modern bikes sport hyper travel table top landing gear suspension to cope with the bumps, and even modern road bikes owe thanks to earlier Scrambles bikes, heading suspension that way from the '70's on; goes to show how much technique beats technology oh-so-often. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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doggone |
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doggone World Chat Champion
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Easy-X |
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Easy-X Super Spammer
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Posted: 10:35 - 22 Oct 2019 Post subject: |
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Hmm, interesting. I could see some advantage with slow, technical stuff but if you're gonna grab air at any point I'd want all the suspension I can get ____________________ Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter |
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iooi |
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iooi Super Spammer
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Teflon-Mike |
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 17:44 - 22 Oct 2019 Post subject: |
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Easy-X wrote: | Hmm, interesting. I could see some advantage with slow, technical stuff but if you're gonna grab air at any point I'd want all the suspension I can get |
The original Shelby/AC Cobra. was an AC Ace with a ford V8 shoe horned in it. The original Ace had all-round-independent-suspension, because basically to build it they took two crashed front wheel drive Fiat tipos, and welded the front ends together with some scaffold pole in the middle; used 'leaf-springs' like the back end of an old Escort.
When Ford decided to up the cubes, and the 'big-block' 427cubic inch engine was being promoted, they went back to Dearborn and the 'New' 417 Cobra got a whole new semi space frame, Coil spring chassis, 'cos even Shelby reckoned that the old buggy-spring frame wouldn't take the torque of the monster motor.
He was actually 'sort' of proved right when they built a 289 Cobra with a big 427 motor to demo it; it did shred tyres, bend it's frame and handle like a pig, so the coil springs and computer designed chassis were born out... ish...
On the Track, drivers actually posted near identical lap-times withe 289's to 427's. One team driver reporting that the 427, though 'fast' would also crash-quick, 'cos when it let go it went anywhere, where when a 289 let go, you could still predict where it was sort of headed and ride the drift.
Like I said Technique over Technology.
In classic scrambles, the matter had been debated my life-time and some, and never, I think ultimately settled.
On the loose, there is a point when the tyres cant grip, and the bike starts to slide. It's then a balancing act between the tyres unhooking and bumps helping them too.
With a Pogo-Stick arrangement, when the tyre breaks, the suspension rebounds and changes the steering geometry, and it can do it very suddenly. If you have a rigid or sort travel suspension, the tyre will 'bump' into a skid sooner, 'b-u-t' it is easier to control the slide .. more aggressive the tyres, so the more pronounced this 'on-limit' unpredictability tends to be..... in scrambles of old and contemporary 'classics', there is a school that shun soft long travel suspension and mega-knobly tyres for this reason, and get results with old T-Shocks or Rigid frame bikes, with very tame block tread or trials tyres... and like that old boy that beat me in trials, that are oft old-boys who more likely break a zimmer frame as a Cheaney one!
It can be very spectacular to watch an old master like that, duel it out on an old Geoff Smith Era BSA 440 Victor, against a similar era Dave Thorpe, Kwak KX440 air-cooled two stroke 'mono'shock.. sounds good the 4-banger against the bumble bee, too!
Yup, you DO have to pity their posteriors, b-u-t, on the dirt you should be 'feet-up' on the pegs, your legs acting as suspension, anyway, and on-the-road IF you are taking air... well you is a crash looking for a place to happen, really!!! It "shouldn't" be an issue!!
Actually something that grates when I see 'lads' out green-laning on KTM's and the like.. trying to balance on a high-wire saddle, convinced that they 'need' 20 inches of suspension or more to ride down a farm track! No, no you don't! but still, their Sunday fantasy, I suppose, no different to the lads on Ninjas trying for knee down up the Cat and Fiddle I guess. ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
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Teflon-Mike |
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Teflon-Mike tl;dr
Joined: 01 Jun 2010 Karma :
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Posted: 17:50 - 22 Oct 2019 Post subject: |
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I DO wonder though, where all-up, their bum would have an easier time on something with less suspension, and a seat that spread the load a bit, and absorbed some shocks, rather than taking air on a g-string hoping that a white power will save the piles occasionally! ____________________ My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'
Last edited by Teflon-Mike on 20:49 - 22 Oct 2019; edited 1 time in total |
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steve the grease |
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steve the grease Crazy Courier
Joined: 26 Jan 2018 Karma :
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stinkwheel |
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stinkwheel Bovine Proctologist
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Posted: 14:12 - 23 Oct 2019 Post subject: |
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I always thought of a "bobber" as being a hardtail custom/chop WITHOUT raked out/over-standard forks.
Why a bobber? Pull on the brake/wind off the throttle and find out. ____________________ “Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles. |
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Old Thread Alert!
The last post was made 4 years, 180 days ago. Instead of replying here, would creating a new thread be more useful? |
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