Ducati Monster Forum

powered by:

March 28, 2024, 02:37:02 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: No Registration with MSN emails
 
   Home   Help Search Login Register  



Pages: [1]   Go Down
  Print  
Author Topic: S2 Heads - 750 or 800???  (Read 1097 times)
MonsterMadMarty
Sr. Member
****
Offline Offline

Posts: 354



« on: April 29, 2020, 07:32:41 PM »

I’ve recently been sorting out a mountain of parts I have and I’ve come across a set of cylinders and heads I can’t for the life of me remember where they came from! The cylinder measure 88mm which I believe make them 750cc.  Tony (aka Koko64) tells me they could also be from a 800cc engine!

The only other markings are a date stamp of 02 and the heads have S2 to the left of the cam cover.

Any ideas please? 750 or 800?

Cheers in advance  Grin
Logged

RIDING - 1993 M900 x 2; 2007 M400; 2007 Factory 900XR

Recently purchased: Fire damaged 2001 S4!

My greatest fear in life is that when I die my better half will sell my Ducati's and tools for the price I told her I paid for them!
koko64
Post Whore
******
Offline Offline

Posts: 15649


« Reply #1 on: April 29, 2020, 08:05:46 PM »

800 was an 03 model iirc, but were the barrels the same as the later 750? I don't know.
Logged

2015 Scrambler 800
2004 GSXR 750
Duck-Stew
Local Moderator
Hero Member
*****
Offline Offline

Posts: 9484


« Reply #2 on: April 30, 2020, 04:20:37 AM »

88mm and a date code of 2002 would make them either ‘02 750 heads, or ‘03 800 heads as you’ve mentioned.

Speed dog has this info.  If he doesn’t answer here, PM him.

Also: 695 shared the 88mm bore.
Logged

Bike-less Portuguese immigrant enjoying life.
Speeddog
West Valley Flatlander
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 14813


RIP Nicky


« Reply #3 on: April 30, 2020, 07:53:44 AM »

Heads can be ID'd by valve diameter, 800's are 43/38, 750's are 41/35.
Can double check by removing the cam endcap, 800's have O3X/V3X cams, and 750 have the venerable OR/VR.

88mm bore is 695, 750 or 800.
You can examine the bore surface, and if it's been run long enough, the wear marks in the bore may allow you to measure the stroke.
695 is 57.2mm, 750 is 61.5 and 800 is 66.
AFAIK, they all use the same cylinder.
Logged

- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908


~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~
MonsterMadMarty
Sr. Member
****
Offline Offline

Posts: 354



« Reply #4 on: April 30, 2020, 06:50:12 PM »

The valves are 41/35 so guessing a 750.  Bore stroke is 66mm suggesting an 800!

The Cams have 2S* which is also stamped on the side of the head (Although I thought it was S2 the 2 is higher to the right the S lower to the left!)


Logged

RIDING - 1993 M900 x 2; 2007 M400; 2007 Factory 900XR

Recently purchased: Fire damaged 2001 S4!

My greatest fear in life is that when I die my better half will sell my Ducati's and tools for the price I told her I paid for them!
Speeddog
West Valley Flatlander
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 14813


RIP Nicky


« Reply #5 on: May 01, 2020, 06:23:08 AM »

Cams stamped O2S & V2S, and 41/35 makes me think they're 620 heads
Logged

- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908


~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~
Pages: [1]   Go Up
  Print  
 
Jump to:  


Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!
SimplePortal 2.1.1