October 22nd, 2014, 04:44 PM | #2 |
Daily Jap rider
Name: Lance
Location: La Porte
Join Date: Dec 2012 Motorcycle(s): 2012 Ninja 250r Posts: A lot.
|
that thing looks too small to be a 1200! Tires look like scooter tires
|
|
October 22nd, 2014, 05:00 PM | #3 |
ninjette.org certified postwhore
Name: .
Location: .
Join Date: Feb 2011 Motorcycle(s): . Posts: Too much.
MOTM - Feb '13, Feb '14
|
Because there's not a scale given in the picture to get you perspective. Look how massive the top end is, then look at the engine in the bike. That's a giant engine.
Also, how exactly are you seeing scooter tires...? You can't even see the width/profile? |
|
October 22nd, 2014, 05:01 PM | #4 |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
|
if the body of the multistrada was the same size as the ninja 250, those would definitely be scooter tires. but its like twice as tall.
__________________________________________________
|
|
October 22nd, 2014, 05:03 PM | #5 |
ninjette.org certified postwhore
Name: .
Location: .
Join Date: Feb 2011 Motorcycle(s): . Posts: Too much.
MOTM - Feb '13, Feb '14
|
Multistrada's are huge.
|
|
October 22nd, 2014, 05:05 PM | #6 |
Daily Jap rider
Name: Lance
Location: La Porte
Join Date: Dec 2012 Motorcycle(s): 2012 Ninja 250r Posts: A lot.
|
the disc on the front are almost the same size as the rim. someone look up the size of the rims and tires please
|
|
October 22nd, 2014, 05:06 PM | #7 | |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
|
Quote:
__________________________________________________
|
|
|
October 22nd, 2014, 05:06 PM | #8 |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
|
all the links on ducati's website that go to anything multistrada are throwing 404 errors... hmm...
__________________________________________________
|
|
October 22nd, 2014, 05:08 PM | #9 |
ninjette.org certified postwhore
Name: .
Location: .
Join Date: Feb 2011 Motorcycle(s): . Posts: Too much.
MOTM - Feb '13, Feb '14
|
the page isn't working:
http://www.ducati.com/bikes/multistrada/1200/index.do but no joke, what an exaggeration, yo! They're probably 320mm rotors on a 17" rim. Nothing exotic looking. |
1 out of 1 members found this post helpful. |
October 22nd, 2014, 05:56 PM | #10 |
Daily Jap rider
Name: Lance
Location: La Porte
Join Date: Dec 2012 Motorcycle(s): 2012 Ninja 250r Posts: A lot.
|
wow, says 17" rims and 320mm! disc's
|
|
October 23rd, 2014, 03:21 AM | #12 | |
Threadkiller
Name: Mick
Location: Monongahela, Pa.
Join Date: Apr 2014 Motorcycle(s): Yellow '04 stocker, '89 FJ1200, '87 Ducati Paso, '71 Yamaha XS1b, '99 KLR650, '81 FXE 80, '97 KTM 200EXC , etc Posts: 430
|
Quote:
If in a racing application a normal valve spring engine had an upper rpm limit of about 10,000 rpm, that same engine design when equipped with a Desmodromic valve system would be capable of 15,000 rpm, and much more power
__________________________________________________
Advantages are taken, not handed out. MSF 138637 |
|
|
October 23rd, 2014, 09:44 AM | #14 |
Threadkiller
Name: Mick
Location: Monongahela, Pa.
Join Date: Apr 2014 Motorcycle(s): Yellow '04 stocker, '89 FJ1200, '87 Ducati Paso, '71 Yamaha XS1b, '99 KLR650, '81 FXE 80, '97 KTM 200EXC , etc Posts: 430
|
Because it's already a desmo?
__________________________________________________
Advantages are taken, not handed out. MSF 138637 |
|
October 23rd, 2014, 10:11 AM | #15 |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
|
i thought someone showed how modern springs don't have any of the issues that desmo valves fix?
__________________________________________________
|
|
October 23rd, 2014, 11:31 AM | #16 | |
Turtle Dancer
Name: Z
Location: Philadelphia, PA
Join Date: Oct 2014 Motorcycle(s): 2014 Ninja 300 SE Posts: 83
|
Quote:
I need to look up at him when we ride. lol |
|
|
October 23rd, 2014, 12:45 PM | #17 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
|
Desmo helps deal with valve float. Within its operating range, there is zero valve float as there is mechanical force pushing the valve back down to where it needs to be. It works right up until it breaks. That's compared to a valve spring, which has to be a compromise between being so stiff that it can fully close the valve in time at peak revs, while not being so stiff to cost power or be too brittle to survive for 100k miles. That used to be a very hard problem, but has become a much less taxing problem for street bikes.
Valve float isn't the only cause for a rev limit though; there are several other mechanisms in play that become dangerous at a certain speed. Max piston speed is another key one. At some point, the mass of the pistons rotating at speed exceeds the capability of the rods/crankshaft from keeping them from aerating the case (by blowing a hole right through that engine; makes for good pics ). That max piston speed is surprisingly constant across different engine sizes. A tiny 4 cylinder 250cc fourstroke running at 20k rpm, and a 1200cc vtwin running at 11k rpm, will both be running near that max piston speed (if i remember correctly, it's somewhere around 6000 fpm). Spin a panigale to 20k, and hope that the piston isn't aimed directly at the family jewels.
__________________________________________________
Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered) |
1 out of 1 members found this post helpful. |
October 23rd, 2014, 12:51 PM | #18 |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
|
have you heard of koeniggseggs "free valve" system? it uses hydraulics to independently control each valve. they say no float and no cam resistance and 100% fully adjustability in real time... electronically control valve overlap, valve timing, valve lift... whatever you want.
__________________________________________________
|
|
October 23rd, 2014, 01:04 PM | #20 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
|
Yup - there have been a number of attempts at running an engine without a camshaft altogether. Whether electrically powered, hydraulically powered, or pneumatically powered, triggering/controlling how and when a valve opens & closes is one of the key places to improve how an engine performs, in all aspects.
__________________________________________________
Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered) |
|
October 23rd, 2014, 01:05 PM | #21 | |
Threadkiller
Name: Mick
Location: Monongahela, Pa.
Join Date: Apr 2014 Motorcycle(s): Yellow '04 stocker, '89 FJ1200, '87 Ducati Paso, '71 Yamaha XS1b, '99 KLR650, '81 FXE 80, '97 KTM 200EXC , etc Posts: 430
|
Quote:
Thanks for the link, I hadn't heard of that.
__________________________________________________
Advantages are taken, not handed out. MSF 138637 |
|
1 out of 1 members found this post helpful. |
October 23rd, 2014, 01:25 PM | #22 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
|
I believe the pneumatic-valve engines used in MotoGP for all the prototypes other than Ducati are still using a camshaft to open the valve; the pneumatic system just acts as the spring to close the valve faster than would be possible using a spring.
__________________________________________________
Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered) |
1 out of 1 members found this post helpful. |
October 23rd, 2014, 01:26 PM | #23 |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
|
@Alex got any infos on how this is implemented? link? diagram?
i've seen one valve system that actually had something like that internal to the valve itself
__________________________________________________
|
|
October 23rd, 2014, 01:32 PM | #24 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
|
Here are some quick google links. I think I read it first in a Kevin Cameron column awhile back.
Link to original page on YouTube.
__________________________________________________
Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered) |
1 out of 1 members found this post helpful. |
October 23rd, 2014, 02:49 PM | #25 |
Hooligan
Name: Robin
Location: Central Iowa
Join Date: Jun 2013 Motorcycle(s): 2013 Ninja EX300 Posts: 250
|
The Multistradas aren't small, but for a touring bike they aren't huge.
Seeing them with the bags on, makes them look larger. Without the hard luggage, they seem much smaller. While they aren't the most exotic looking of the Ducs, they are quite versatile if you want to go from the street to the dirt and gravel without changing bikes.
__________________________________________________
Qui patiens est, teres. Teres est, ieiunare. | Twitter: @Rogue_300 |
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[nytimes.com] - Wheelies: The Multistrada Edition | Ninjette Newsbot | Motorcycling News | 0 | September 19th, 2012 06:10 PM |
[visordown.com] - Ducati UK: No Multistrada recall | Ninjette Newsbot | Motorcycling News | 0 | August 12th, 2010 12:10 PM |
[motorcycledaily.com] - Multistrada Replacement to be Named...Multistrada | Ninjette Newsbot | Motorcycling News | 0 | October 31st, 2009 06:40 PM |
[visordown.com] - First Look: Ducati Multistrada special | Ninjette Newsbot | Motorcycling News | 0 | April 20th, 2009 02:30 AM |
[twistingasphalt.com] - The Future Multistrada? | Ninjette Newsbot | Motorcycling News | 0 | December 10th, 2008 09:20 AM |
|
|