Reversed Heads

  • Gomer
  • Topic Author
  • Offline
  • User
  • I crap worms that look like spaghetti
More
08 Feb 2009 14:34 - 08 Feb 2009 14:36 #262985 by Gomer
Replied by Gomer on topic Reversed Heads
What KruZer is saying is the ram effect won't have much effect on a KZ because the aerodynamics spoil the airflow around where the carbs would sit if the heads are reversed. Not that ram air doesn't do anything. To get the full effect I'd have to move the carbs off the heads.

flht1997 wrote:

what year XS are we talking?, all the ones i have had my hands in had multi-piece

1021


Oops. My bad: The one I saw was an 81 and the cam was what was solid and the guy still cut, rotated and rewelded. He made a degreeing plate out of an old CD.
ماذا تعني لا العذارى؟
(What do you mean 'no virgins'?)
Last edit: 08 Feb 2009 14:36 by Gomer.

Please Log in or Create an account to join the conversation.

More
28 Nov 2009 11:11 #336287 by 79MKII
Replied by 79MKII on topic Reversed Heads
Looks like Yamaha is producing a factory motorcycle with a reversed cylinder head - could be the start of a new trend??

2010 YZ450F:
600
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
Attachments:

Please Log in or Create an account to join the conversation.

  • mark1122
  • Offline
  • User
  • Keep twisting it
More
28 Nov 2009 14:12 #336311 by mark1122
Replied by mark1122 on topic Reversed Heads
79MKII wrote:

Looks like Yamaha is producing a factory motorcycle with a reversed cylinder head - could be the start of a new trend??

2010 YZ450F: [img size=600]

Very coolB)

76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.

~ ~ ~_@
~ ~ _- \,
~ (k) / (z)

Please Log in or Create an account to join the conversation.

More
28 Nov 2009 18:06 #336354 by Old Man Rock
Replied by Old Man Rock on topic Reversed Heads
Well you'd have to change the crank, gearing and output drive rotations or some Plummen type rigging... :P

Whoa, front nose wheelies... Ewwwwwwwww, someone start a posting!
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter

Phoenix, Az

Please Log in or Create an account to join the conversation.

More
28 Nov 2009 18:33 - 28 Nov 2009 18:45 #336365 by PLUMMEN
Replied by PLUMMEN on topic Reversed Heads
how about just disconect the rear drive chain on a rokon :laugh:
350
Still recovering,some days are better than others.
Attachments:
Last edit: 28 Nov 2009 18:45 by PLUMMEN.

Please Log in or Create an account to join the conversation.

  • TeK9iNe
  • Offline
  • User
  • What did you do!?!
More
28 Nov 2009 22:58 #336406 by TeK9iNe
Replied by TeK9iNe on topic Reversed Heads
PLUMMEN wrote:

how about just disconect the rear drive chain on a rokon :laugh:


LOL :laugh: Sweet!
Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)

Please Log in or Create an account to join the conversation.

More
29 Nov 2009 17:34 #336611 by APE Jay
Replied by APE Jay on topic Reversed Heads
Ram air on modern sportbikes works because it goes into an airbox. If the carbs were in front, you would have to have an airbox up front to make it work. A lot of work was done with this in a wind tunnel.

As for the fuelers, Elmer told me himself there was no advantage other than maintenance. When they first did it, they were using positive displacement blowers. Only so much air moves from one side of the blower to the other side with each revolution, regardless of how much you try to ran thru it.
www.KZzone.com

Please Log in or Create an account to join the conversation.

  • Gomer
  • Topic Author
  • Offline
  • User
  • I crap worms that look like spaghetti
More
29 Nov 2009 21:51 #336651 by Gomer
Replied by Gomer on topic Reversed Heads
Like I said before. I don't care about the ram effect or ease of maintenance. I just think it's the tits.
ماذا تعني لا العذارى؟
(What do you mean 'no virgins'?)

Please Log in or Create an account to join the conversation.

More
29 Nov 2009 22:12 #336653 by TexasKZ
Replied by TexasKZ on topic Reversed Heads
Seems like a perfectly good reason to give it a try.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

Please Log in or Create an account to join the conversation.

More
07 Dec 2009 13:33 #337953 by TerryK
Replied by TerryK on topic Reversed Heads
79MKII wrote:

Looks like Yamaha is producing a factory motorcycle with a reversed cylinder head - could be the start of a new trend??

2010 YZ450F:

600


That was done for mass centralization.......and marketing. ;)
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header



1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc

Ontario, Canada

Please Log in or Create an account to join the conversation.

  • Becker
  • Offline
  • User
  • The Doctor Will Rise Again
More
07 Dec 2009 13:58 #337958 by Becker
Replied by Becker on topic Reversed Heads
It was also done to give the intake a straighter shot into the combustion chamber.
78 KZ750B3
79 KZ400 LTD
78 KZ650C2
79 KZ650C3
78 KZ650B2A
80 KZ650F1
80 KZ650E1
81 CB750K Super Sport

Please Log in or Create an account to join the conversation.

More
07 Dec 2009 14:00 #337959 by TerryK
Replied by TerryK on topic Reversed Heads
Becker wrote:

It was also done to give the intake a straighter shot into the combustion chamber.


There are many inherent advantages to the design. I was only pointing out the main reason Yamaha went with this design.
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header



1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc

Ontario, Canada

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum

Forum Links