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Yeah,loads of Kawasakis used the flap and still do, as a tool to beat noise regulations. I think that's all it ever did on most bikes anyway.Nidge wrote: Wed Mar 31, 2021 12:34 pm I still only associate EXUP with Yamaha - do any other manufacturers have something similar?
Isn't that a 4-stroke version of the 'Power-valve' in 80s/90s 2-strokes though? I can't remember if the RD350LC had one, but the RGV250 certainly did.Nidge wrote: Wed Mar 31, 2021 12:34 pm I still only associate EXUP with Yamaha - do any other manufacturers have something similar?
Or the ill-fated Yamaha GTS.Rockburner wrote: Wed Mar 31, 2021 1:11 pm I'm pretty sure no-one else (manufacturer-wise) has used 'Telelever' front suspension. (Yes - invented by A Brit - Hossack IIRC - but BMW are the only manufacturer who used it).
The Yamaha GTS was a hub-center-steered bike, NOT Hossack/Telelever.Skub wrote: Wed Mar 31, 2021 1:14 pmOr the ill-fated Yamaha GTS.Rockburner wrote: Wed Mar 31, 2021 1:11 pm I'm pretty sure no-one else (manufacturer-wise) has used 'Telelever' front suspension. (Yes - invented by A Brit - Hossack IIRC - but BMW are the only manufacturer who used it).
It's different to a proper hossack setup as it uses sliding tubes.Rockburner wrote: Wed Mar 31, 2021 1:11 pm I'm pretty sure no-one else (manufacturer-wise) has used 'Telelever' front suspension. (Yes - invented by A Brit - Hossack IIRC - but BMW are the only manufacturer who used it).
I got it wrong:KungFooBob wrote: Wed Mar 31, 2021 1:20 pmIt's different to a proper hossack setup as it uses sliding tubes.Rockburner wrote: Wed Mar 31, 2021 1:11 pm I'm pretty sure no-one else (manufacturer-wise) has used 'Telelever' front suspension. (Yes - invented by A Brit - Hossack IIRC - but BMW are the only manufacturer who used it).
Ah. Didn't know there were differences.Rockburner wrote: Wed Mar 31, 2021 1:16 pm
The Yamaha GTS was a hub-center-steered bike, NOT Hossack/Telelever.
There's quite a few different 'funny-front-ends' fyi.
My very first powered two wheeler, a Peugeot Speedfight 2 just like this (but without rim tape), had a SSSA at the front steered from the 'hinge' of the swingarm.
The top yoke is also on a ball joint... I only discoverd this when I removed the forks and it flopped over to one side.Rockburner wrote: Wed Mar 31, 2021 1:31 pmI got it wrong:KungFooBob wrote: Wed Mar 31, 2021 1:20 pmIt's different to a proper hossack setup as it uses sliding tubes.Rockburner wrote: Wed Mar 31, 2021 1:11 pm I'm pretty sure no-one else (manufacturer-wise) has used 'Telelever' front suspension. (Yes - invented by A Brit - Hossack IIRC - but BMW are the only manufacturer who used it).
Hossack =/= BMW DuoLever
SaxTrac =/= BMW Telelever. (IIRC)
DuoLever (Hossack) 'looks' a bit like the old Girder forks, with 2 'swing-arms' but the steering stem is in a different place in the assembly (and other differences).
Telelever is a single swingarm with a ball joint that moves the steering pivot to directly above the wheel and uses the sliding tubes simply to provide steering inputs.
Isn't that essentially a 'trailing link' setup? any pics of it with it's clothes off?Mr. Dazzle wrote: Wed Mar 31, 2021 1:35 pmMy very first powered two wheeler, a Peugeot Speedfight 2 just like this (but without rim tape), had a SSSA at the front steered from the 'hinge' of the swingarm.
Maybe the only modern bike with 3 stud wheels too?
This could get a bit long, Yamaha's original YPVS consists of a cylinder with a cut out in that rotates near the exhaust port and effectively lowers the exhaust port to boost mid range, RGV powervalves do the same thing but work differently, they have a blade that goes up and down, before this Suzuki and Honda used a valve to open and close a chamber in the exhaust to boost mid range power, this what the original Yamaha EXUP valves do, I think the later ones work differently.Rockburner wrote: Wed Mar 31, 2021 1:13 pmIsn't that a 4-stroke version of the 'Power-valve' in 80s/90s 2-strokes though? I can't remember if the RD350LC had one, but the RGV250 certainly did.Nidge wrote: Wed Mar 31, 2021 12:34 pm I still only associate EXUP with Yamaha - do any other manufacturers have something similar?
Which one - Duo or Tele?KungFooBob wrote: Wed Mar 31, 2021 1:35 pmThe top yoke is also on a ball joint... I only discoverd this when I removed the forks and it flopped over to one side.Rockburner wrote: Wed Mar 31, 2021 1:31 pmI got it wrong:KungFooBob wrote: Wed Mar 31, 2021 1:20 pm
It's different to a proper hossack setup as it uses sliding tubes.
Hossack =/= BMW DuoLever
SaxTrac =/= BMW Telelever. (IIRC)
DuoLever (Hossack) 'looks' a bit like the old Girder forks, with 2 'swing-arms' but the steering stem is in a different place in the assembly (and other differences).
Telelever is a single swingarm with a ball joint that moves the steering pivot to directly above the wheel and uses the sliding tubes simply to provide steering inputs.
That's very interesting and I am perfectly happy to be corrected.KungFooBob wrote: Wed Mar 31, 2021 1:45 pm The Tele on my K1200RS, the top yoke is defo on some kind of ball joint.
(from here https://motoress.com/rider/bmw-teleleve ... -leverage/)I've added a link to the parts fiche on realoem, if you drill through the part number you can see it's the exact same part number as the lower ball joint.Rockburner wrote: Wed Mar 31, 2021 1:47 pmThat's very interesting and I am perfectly happy to be corrected.KungFooBob wrote: Wed Mar 31, 2021 1:45 pm The Tele on my K1200RS, the top yoke is defo on some kind of ball joint.
I've never taken out both of the fork tubes at the same time before - so I thought the top-yoke was simply on a bearing. It does make a lot of sense for it to be a ball joint though.
