more bike porn

[ktm jeff]

53 minutes ago, VocalNeal said:

Surely whomever drew this got their sprockets mixed up at the bottom?

I cant see a gear lining up with the lower crank , so maybe there is a chain connecting the cranks on the rear of the engine.  

[VocalNeal]

OK yes maybe. 

[Damrongsak]

6 hours ago, Justgrazing said:

Thanks Trans .. some more of interest .. engine drawing for the Golden Dream .. 

The bike at the bottom retains the same engine config' but is significantly different in the barrels and heads dept' .. not enough info on this one to know if it is/was another machine they were developing alongside Golden Dream or whether it is counted as one of the G D total ..

That drawing is different in the gearbox/starter.  I can't even see a kick starter on the Golden Dream.

 

The two cranks are geared together at the back side of the engine.

 

[kickstart]

Suzuki 1200 cc Bandit Turbo ,from a Subaru Imprezza , the trick bit the Spodon frame ,3 inch exhaust .

Like the swinging arm .

[Damrongsak]

Odd - "BMW K75 Alpha Landspeeder" . Asking price $450,000.  https://thearsenale.com/products/bmw-k75-alpha-landspeeder#

 

 

1965 Ducati 125cc 4 cyl GP bike.  Listed on Bonhams for about 1/2 million $.

 

[Randell]

MOTORCYCLES

Roland Sands builds a straight-line dragster out of the BMW R18

AMA 250GP national champion racer Roland Sands has been taking perfectly good motorcycles and engoodening them further for 20-odd years. Now, he's turned his attentions to BMW's giant boxer cruiser, giving the R18 a hardtail dragster treatment.   R

[Justgrazing]

Couple of beautiful New Hudson's especially the top bike .. 

The Golden Dream engine diagram does throw up some confusion as to what the chain at the front with different sized sprockets is doing when both cranks geared together ( red & yellow arrows ) rotate at the same speed .. and what its purpose is isn't clear either as the cams are driven by the chain in front .. unfortunately pic's let alone diagrams of this engine are rare but I will look a bit deeper .. 

 

 

 

[MartinL]

50 minutes ago, Justgrazing said:

The Golden Dream engine diagram does throw up some confusion as to what the chain at the front with different sized sprockets is doing when both cranks geared together ( red & yellow arrows ) rotate at the same speed .. and what its purpose is isn't clear either as the cams are driven by the chain in front .. unfortunately pic's let alone diagrams of this engine are rare but I will look a bit deeper .. 

 

 

My two penn'orth, for what it's worth, re. the front pair of chains:-

2-sprocket set-up - top (small) sprocket is fixed to top crankshaft end and turns lower (large) sprocket to give 1/2 engine speed needed for camshaft drives (assumption since can't count sprocket teeth but  based on different sprocket sizes). Large sprocket isn't attached to anything except the small sprocket - freewheeling on a stub shaft. I'd guess that the shaft end with hex-head bolt, just above the large sprocket is the lower crankshaft end

3-sprocket set-up - lower sprocket is keyed to same shaft as large sprocket and therefore rotates at half engine speed. Chain drives 2 more sprockets of the same size as lower sprocket, so also at half engine speed, which are keyed to the camshafts.

 

Red arrow is top crank connecting gear. Yellow arrow is meshing point of two crank connecting gears.

[ktm jeff]

1 hour ago, MartinL said:

 

My two penn'orth, for what it's worth, re. the front pair of chains:-

2-sprocket set-up - top (small) sprocket is fixed to top crankshaft end and turns lower (large) sprocket to give 1/2 engine speed needed for camshaft drives (assumption since can't count sprocket teeth but  based on different sprocket sizes). Large sprocket isn't attached to anything except the small sprocket - freewheeling on a stub shaft. I'd guess that the shaft end with hex-head bolt, just above the large sprocket is the lower crankshaft end

3-sprocket set-up - lower sprocket is keyed to same shaft as large sprocket and therefore rotates at half engine speed. Chain drives 2 more sprockets of the same size as lower sprocket, so also at half engine speed, which are keyed to the camshafts.

 

Red arrow is top crank connecting gear. Yellow arrow is meshing point of two crank connecting gears.

I think you are spot on. The rear of the upper crank could also be connected to oil/fuel pump and distributor and starter ( if added). Great engineering. National Motorcycle Museum is just up the road from my house in England.

[ballpoint]

Speaking of Brough Superior, check this out: A collaboration between Aston Martin and (the new) Brough Superior, the AMB 001. Powered by a 997cc turbo charged V twin, putting out 180hp, and good for 186mph.  Only 100 to be built at just £100,000 a piece, making them the cheapest new Astons currently available.

 

 

 

 

 

[Justgrazing]

On 8/18/2020 at 11:05 AM, MartinL said:

 

My two penn'orth, for what it's worth, re. the front pair of chains:-

2-sprocket set-up - top (small) sprocket is fixed to top crankshaft end and turns lower (large) sprocket to give 1/2 engine speed needed for camshaft drives (assumption since can't count sprocket teeth but  based on different sprocket sizes). Large sprocket isn't attached to anything except the small sprocket - freewheeling on a stub shaft. I'd guess that the shaft end with hex-head bolt, just above the large sprocket is the lower crankshaft end

3-sprocket set-up - lower sprocket is keyed to same shaft as large sprocket and therefore rotates at half engine speed. Chain drives 2 more sprockets of the same size as lower sprocket, so also at half engine speed, which are keyed to the camshafts.

 

Red arrow is top crank connecting gear. Yellow arrow is meshing point of two crank connecting gears.

Well spotted Martin and it does make sense .. the drawing as they've tried to 3d it abit is not the clearest and can lead to think the large sprocket is on the lower crank so then it doesn't make sense .. but as you correctly point the bolt above the sprocket is the crank centre point so then it all does make sense .. gold star for that ⭐ ..

[Justgrazing]

Malevolence on 2 wheels .. 1977 Kawa' KR750 .. great stuff back in the 70's watching these smoke it out against the TR750 Suzooks and Yam's TZ750 .. 

 

[Justgrazing]

Jarno Saarinen .. one of the rising stars of the early 70's and the rider credited by many with the knee out hanging off style adopted by some many of his peers .. 

Started at 16 working in the Puch Styr assembly plant in Finland .. cobbled together enough money including bluffing 3 banks who thought they were financing his higher education to start as a privateer in regional then National championships .. 1970 1st full season as a privateer in the 250 world championships he finished 4th on a air-cooled Yamaha prepped and fettled by himself .. this brought him to their attention who part assisted him through a dealership in both 250 and 350 world championships coming 3rd and 2nd respectively in the '71 championships .. That was enough for Yamaha to offer him a works bike with full support for the following season in which in won the 250 title and came 2nd in the 350 class and in the process force MV to redesign their 350 bike for the 73 season .. Saarinen was at this time also being romanced by Benelli who wanted him as their rider with him actually testing some of their machines .. Yamaha responded by offering him the newly developed 500 stroker to take on the MV's in what was then the premier class in motorcycle racing .. Saarinen stuck with Yamaha as he considered that 500 crown the ultimate achievement .. sadly it was not to be as he was killed aged 28 shortly after the start of the 250 race at the Nations G P held at Monza in the 5th round of the championship in one of the worst accidents seen in G P racing and that led to numerous safety revisions of track side barriers at car orientated circuits where motorcycles also race as was the case with Monza ..

Jarno Saarinen .. one of the great motorcycle racers pictured alongside Phil Read and Agostini and displaying his unique riding style .. 

 

[Justgrazing]

On 8/11/2020 at 2:26 PM, kickstart said:

Honda Gold Wing this is a 1976 ,you either love them or hated them ,I put them in the same mode as HD's  the latter  

Bike magazine tested an early one and dubbed it a Wing and a Prayer ,did not handle over well , weather  it was the nylon tyres of the time, some said the rear end with shaft drive did not help. 

At the time of 4 cylinder OHC  UJM's it certainly was different.

Mate of mine part exchanged  a Suzuki GT 550 for one.    

Very left field when they first came out .. and huge .. that was the overwhelming impression when I first seen one for real .. the 2nd was the bizarre ladybird fuel tank .. but as Honda's do it became a long runner addition to their lineup morphing into the truck on 2 wheels it has become now .. 

 

[Randell]

 

 

MOTORCYCLES

Massive week in vintage motorcycle auction sales

It has been a remarkable week in the collectible motorcycle industry, with many important motorcycles selling at Bonhams' Bicester Heritage Auction, with two others being sold in Monterey. Here's our summary of the major sales and non-sales.   Read more

[MartinL]

2 hours ago, Randell said:

 

 

MOTORCYCLES

Massive week in vintage motorcycle auction sales

It has been a remarkable week in the collectible motorcycle industry, with many important motorcycles selling at Bonhams' Bicester Heritage Auction, with two others being sold in Monterey. Here's our summary of the major sales and non-sales.   Read more

I suppose many of us have looked at these auction brochures and thought "I had one of those. HOW much is this one selling for!!!!!!!!!? Bloody ridiculous price!" 

 

It's my turn to say that now . In my case it's the 1979 Ducati Hailwood Rep., listed as having sold for £36,800. I think I bought mine new for about £2,999. I had the earliest one described in the blurb - fibreglass tank cover (with continuous rather than segmented green stripe) over steel 900SS tank, one-piece fairing and two seats. I totally loved it but my (ex)wife hated riding pillion on it - and I hated taking her even more! - so I very reluctantly sold it for a BMW R100RS, which she loved and I hated. I was back to a 900SS within a year and a cheap Japanese runabout for pillion trips.

 

£2,999 was a big price to pay in '79 but it was almost a daily-use bike. £36,800 for a toy, an occasional ride? Madness. But I doubt bikes like these are bought for biking fun, more for investment potential. So sad if that's the case.

[Justgrazing]

Anyone see the Styr MotoGP from the Red Bull ring Sunday and Rossi and Vinales near miracle escape from decapitation by Morbidelli's bike flying thru the air after clipping the back of Johan Zarco's Ducati at 200 mph .. having seen it a number of times there but for the grace go I .. 

Morbidelli's bike was completely unrecognisable destroyed seconds after that bottom shot was taken when it finally came to rest .. 

 

[Damrongsak]

Yes, I saw that, and there are some goo follow-up videos showing the whole thing from various angles and whatnot.  Apparently the turn is one where they brake severely just before the next turn.  They go so fast into it that drafting and so forth have a tremendous effect.  So they ran off track and the (riderless) bikes proceeded across the next slow turn where Rossi and Vinales were in.  "Racing incident" or reckless driving is open to various opinions.  But excessively aggressive riding is on everyone's minds these days. 

 

Bring back the 50cc, 125cc and 250cc classes!  No computers.  250 kph is enough.  Who needs 350?

[Justgrazing]

7 hours ago, Damrongsak said:

 

Bring back the 50cc, 125cc and 250cc classes!  No computers.  250 kph is enough.  Who needs

Moto3 is the junior class .. 250cc with the racing ultra competitive but everyone then wants to move on to the MotoGP big bikes .. it's what we do .. thank God both Morbidelli and Zarco weren't badly hurt in that accident Sunday .. 

 

[VocalNeal]

7 hours ago, Damrongsak said:

But excessively aggressive riding is on everyone's minds these days. 

What is racing if not being excessively aggressive? I don't think one can win by being passive? 

Once the lights go out all bets are off?

[Justgrazing]

Yamaha's YDS1 .. one of their first 250's .. nice exhausts .. 

 

[Justgrazing]

Rossi was lucky not once but twice as a split second after Morbidelli's bike missed him what was left of Zarco's went across the front of him exactly the same .. there can be no more than a couple of thousands of a second in it literally .. Vale 9 lives should his new nickname .. 

 

[Randell]

MOTORCYCLES

Honda takes the CBR600RR fully electronic for 2021

The venerable Honda CBR600RR gets a full makeover for 2021, including an electronic throttle and an inertial control unit. So as well as a power boost, it gets lean-sensitive traction control, ABS, wheelie control, power modes and other goodies.   Read more

[Justgrazing]

from Redbull Ring this weekend part 2 in how to destroy hugely expensive handbuilt motorcycles with Maveric Vinales spectacular bale out at the end of the main straight when braking for the tight right hander .. only his didn't leaving Mav' no option but to jump off at an estimated 140 mph leaving the bike to carry on into the airbag crash absorbers at the end of the run off area but still destroying itself in the process and catching fire to complete the destruction .. 

Scrutineers will surely be looking at what's happened here as you can't have brakes giving up out of the blue like that .. it's a testament to the strength of his leathers though that they remained in one piece after that .. 

Miguel Oliveira won the race on a satellite KTM bike with KTM works bike of Esparago in 3rd .. the Suzuki's are also doing well in this strangest of seasons so far though I'll wager the works Yamaha team will be glad to leave the Redbull Ring after today alongside last week's events .. 

 

[Randell]

MOTORCYCLES

Triumph teases upcoming retro, middleweight Trident streetbike

Triumph has taken the unusual step of presenting a "design prototype" of its upcoming Trident, a neo-retro middleweight roadster that presumably uses the outstanding 765cc 3-cylinder engine from the Street Triple.   Read more

[Justgrazing]

Mid 30's PMZ 750 from Russian .. simple old sidevalve plodder with more than a passing hint to an Indian .. you wouldn't want to crash into it though as some of it looks like it wouldn't be out of place on a bridge .. 

 

[Justgrazing]

Pannonia from Hungary .. top bike is an old skool 250 2 stroke and the bottom bike a 70's 125 with capitalist twin cylinders and a touch of CZ about the fuel tank .. sort of communist version of Yamaha's YAS1 .. 

 

[ballpoint]

UK custom builder Auto Fabrica gets its hands on a Yamaha XSR900 ...

 

 

[ballpoint]

...  And German custom builder Triple Speed tricks out a Husqvarna Nuda 900R

[ballpoint]

A regular Husky Nuda 900R: