Dont think so Julian....Julian_Boolean wrote: ↑Fri Dec 11, 2020 2:08 pmThat photo is 1980s, fwd Ford Escort in the backgroundderek badger wrote: ↑Thu Dec 10, 2020 9:59 pmSnowmobile torque convertor, both cranks linked by chain drive. Mind your bell bottoms...
interesting bikes found randomly..
-
- Posts: 2088
- Joined: Tue Mar 17, 2020 8:50 am
- Location: Top 'o the Worle
- Has thanked: 216 times
- Been thanked: 666 times
Re: interesting bikes found randomly..
- derek badger
- Posts: 898
- Joined: Sat Mar 14, 2020 1:12 pm
- Location: Surrey Hills
- Has thanked: 799 times
- Been thanked: 1135 times
Re: interesting bikes found randomly..
I think it's Australian. Ford Falcon estate or similar?David wrote: ↑Fri Dec 11, 2020 3:28 pmDont think so Julian....Julian_Boolean wrote: ↑Fri Dec 11, 2020 2:08 pmThat photo is 1980s, fwd Ford Escort in the backgroundderek badger wrote: ↑Thu Dec 10, 2020 9:59 pm
Snowmobile torque convertor, both cranks linked by chain drive. Mind your bell bottoms...
-
- Posts: 4703
- Joined: Tue Mar 17, 2020 6:51 am
- Been thanked: 2501 times
Re: interesting bikes found randomly..
On a 2T they all need to be the same length if you want performance. It's less an engine and more of a musical instrument.Horse wrote: ↑Fri Dec 11, 2020 3:11 pm Is the left header kinked in for ground clearance? As it has separate header & exhaust (I hesitate to say 'silencer') for each cylinder, presumably they don't all need to be the same length? Or is it, that for two strokes, the entire thing has to be a certain length?
Read about Walter Kaaden's work at DKW.
-
- Posts: 11128
- Joined: Mon Mar 16, 2020 6:40 pm
- Location: The road of many manky motorcycles
- Has thanked: 626 times
- Been thanked: 4070 times
Re: interesting bikes found randomly..
Looks like a US spec Escortderek badger wrote: ↑Fri Dec 11, 2020 3:32 pmI think it's Australian. Ford Falcon estate or similar?David wrote: ↑Fri Dec 11, 2020 3:28 pmDont think so Julian....Julian_Boolean wrote: ↑Fri Dec 11, 2020 2:08 pm
That photo is 1980s, fwd Ford Escort in the background
https://en.wikipedia.org/wiki/Ford_Esco ... _Wagon.jpg
-
- Posts: 13490
- Joined: Mon Mar 16, 2020 7:57 pm
- Location: Milton Keynes
- Has thanked: 2611 times
- Been thanked: 6015 times
Re: interesting bikes found randomly..
They need to be the same frequency I think, not necessarily the same length? They look like they're different diameters.
Ducati made a marketing song and dance about using different bore headers on similar grounds ISTR.
-
- Posts: 11128
- Joined: Mon Mar 16, 2020 6:40 pm
- Location: The road of many manky motorcycles
- Has thanked: 626 times
- Been thanked: 4070 times
Re: interesting bikes found randomly..
Depends on what you want to do with a two stroke, for instance, RD500s run the front cylinders in a different tune to the rear cylinders to boost the mid range, but they are effectively two engines joined together on a common clutch, whether you could get away with this on a single crank, I don't know, I think that eventually you'd twist the crank on it's centre pin. But for cylinders to run the same on any engine the exhausts have to have the same resonant qualities on each cylinder, there's a number of ways you can achieve this, especially on two strokes, four strokes are much easier to work out, where it's just the pipe length, diameter and taper that need to be taken into account, bends don't have a massive effect so long as you measure the length correctly - you have to average the inside and outside lengths of the bend - all this is theoretical, real world results may differ, and you can't beat someone with experience making you an exhaust.Mr. Dazzle wrote: ↑Fri Dec 11, 2020 4:10 pmThey need to be the same frequency I think, not necessarily the same length? They look like they're different diameters.
Ducati made a marketing song and dance about using different bore headers on similar grounds ISTR.
- Potter
- Posts: 9665
- Joined: Sat Mar 14, 2020 1:32 pm
- Has thanked: 2216 times
- Been thanked: 4612 times
Re: interesting bikes found randomly..
I remember reading that by the end of the two stroke era the Japanese had got so good at it that they didn't need to restrict bikes anymore, they just made them to only produce a certain amount of HP. This sounds a lot easier than it is, but prior to this they made bikes that worked and then restricted them to meet regulations.
Making a bike that revved out cleanly and felt like it wasn't held back in any way, but only producing a specific amount of power, was the result of some very clever engineering.
Making a bike that revved out cleanly and felt like it wasn't held back in any way, but only producing a specific amount of power, was the result of some very clever engineering.
-
- Posts: 3664
- Joined: Sun May 03, 2020 10:11 pm
- Has thanked: 264 times
- Been thanked: 1242 times
Re: interesting bikes found randomly..
Because some cylinders are more powerful than others?Julian_Boolean wrote:I think that eventually you'd twist the crank on it's centre pin
In any multi cylinder engine, one cylinder is producing peak effective pressure and torque, while other cylinders are at negative pressure and torque.
-
- Posts: 13490
- Joined: Mon Mar 16, 2020 7:57 pm
- Location: Milton Keynes
- Has thanked: 2611 times
- Been thanked: 6015 times
Re: interesting bikes found randomly..
Exhaust tuning is alive and well as a science, it's done on quite sophisticated computer models now as you'd expect. It didn't die with 2 strokes either did it, ask anyone with a variable valve timing engine or funny flappy exhausts.
- Taipan
- Posts: 13260
- Joined: Sat Mar 14, 2020 1:48 pm
- Location: Essex Riviera!
- Has thanked: 15607 times
- Been thanked: 9850 times
- weeksy
- Site Admin
- Posts: 22951
- Joined: Sat Mar 14, 2020 12:08 pm
- Has thanked: 5503 times
- Been thanked: 12760 times
Re: interesting bikes found randomly..
https://www.ebay.co.uk/itm/HUSQVARNA-70 ... SwD1Bfz1k8
Whys it interesting then.... well, it's a Husky SM with 10,000 miles, which IMO is quite interesting in it's own right
Whys it interesting then.... well, it's a Husky SM with 10,000 miles, which IMO is quite interesting in it's own right
- Taipan
- Posts: 13260
- Joined: Sat Mar 14, 2020 1:48 pm
- Location: Essex Riviera!
- Has thanked: 15607 times
- Been thanked: 9850 times
Re: interesting bikes found randomly..
weeksy wrote: ↑Tue Dec 15, 2020 7:55 am https://www.ebay.co.uk/itm/HUSQVARNA-70 ... SwD1Bfz1k8
Whys it interesting then.... well, it's a Husky SM with 10,000 miles, which IMO is quite interesting in it's own right
Sell it to me and I'll soon put a stop to that!
- weeksy
- Site Admin
- Posts: 22951
- Joined: Sat Mar 14, 2020 12:08 pm
- Has thanked: 5503 times
- Been thanked: 12760 times
Re: interesting bikes found randomly..
Ah, you're just not cool enough for one matey.Taipan wrote: ↑Tue Dec 15, 2020 7:59 amweeksy wrote: ↑Tue Dec 15, 2020 7:55 am https://www.ebay.co.uk/itm/HUSQVARNA-70 ... SwD1Bfz1k8
Whys it interesting then.... well, it's a Husky SM with 10,000 miles, which IMO is quite interesting in it's own right
Sell it to me and I'll soon put a stop to that!
- Taipan
- Posts: 13260
- Joined: Sat Mar 14, 2020 1:48 pm
- Location: Essex Riviera!
- Has thanked: 15607 times
- Been thanked: 9850 times
Re: interesting bikes found randomly..
Right the NCX is getting a carbon fibre wrap. That should fix me image!weeksy wrote: ↑Tue Dec 15, 2020 8:00 amAh, you're just not cool enough for one matey.Taipan wrote: ↑Tue Dec 15, 2020 7:59 amweeksy wrote: ↑Tue Dec 15, 2020 7:55 am https://www.ebay.co.uk/itm/HUSQVARNA-70 ... SwD1Bfz1k8
Whys it interesting then.... well, it's a Husky SM with 10,000 miles, which IMO is quite interesting in it's own right
Sell it to me and I'll soon put a stop to that!
- weeksy
- Site Admin
- Posts: 22951
- Joined: Sat Mar 14, 2020 12:08 pm
- Has thanked: 5503 times
- Been thanked: 12760 times
Re: interesting bikes found randomly..
As long as you match it with an MX helmet and some big boots !
- Yorick
- Posts: 16279
- Joined: Sat Mar 14, 2020 8:20 pm
- Location: Paradise
- Has thanked: 10117 times
- Been thanked: 6649 times
Re: interesting bikes found randomly..
I had the Kettle when I was 18. And also had the GSXR which donated all the extra bits. Hmmm.
-
- Posts: 11128
- Joined: Mon Mar 16, 2020 6:40 pm
- Location: The road of many manky motorcycles
- Has thanked: 626 times
- Been thanked: 4070 times
Re: interesting bikes found randomly..
It's a KTM with different clothes, not an Italian Husqvarna.weeksy wrote: ↑Tue Dec 15, 2020 7:55 am https://www.ebay.co.uk/itm/HUSQVARNA-70 ... SwD1Bfz1k8
Whys it interesting then.... well, it's a Husky SM with 10,000 miles, which IMO is quite interesting in it's own right
- Skub
- Posts: 11868
- Joined: Mon Mar 16, 2020 5:32 pm
- Location: Norn Iron
- Has thanked: 9688 times
- Been thanked: 9704 times
Re: interesting bikes found randomly..
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
Walt Whitman
https://soundcloud.com/skub1955
- Taipan
- Posts: 13260
- Joined: Sat Mar 14, 2020 1:48 pm
- Location: Essex Riviera!
- Has thanked: 15607 times
- Been thanked: 9850 times
Re: interesting bikes found randomly..
Imagine standing behind that, smelling the smoke and listening to it idle as the baffles rattle against the circlips...