I broke number 3 cam bearing holder!!

  • peter1958
  • peter1958's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • Posts: 1553
  • Thanks: 198

Re: I have a problem!!

18 Mar 2017 16:40
#757034
www.kzrider.com/forum/2-engine/360259-br...a-78-kz1000-now-what
www.kzzone.com/ cavanaughracing.com/kzdata.html www.mtceng.com/index.php/us-dealers/44-f...-performance-orlando

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

  • VTEC
  • VTEC's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 558
  • Thanks: 80

Re: I have a problem!!

21 Mar 2017 18:20 - 21 Mar 2017 18:24
#757350
Technically, because the caps are cast with the head, the correct repair is a new head. But if you install a used #3 cap, and the cam spins freely with oil clearance is in specs, It most likely would be fine. I've done it on a Honda Civic engine.
KZ1000-K2
ZRX1100
XR400R
Last edit: 21 Mar 2017 18:24 by VTEC.
The following user(s) said Thank You: GPz550D1

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

  • Scirocco
  • Scirocco's Avatar
  • Offline
  • Premium Member
  • Premium Member
    Registered
  • Never change a running system
  • Posts: 4397
  • Thanks: 2262

Re: I broke number 3 cam bearing holder!!

21 Mar 2017 23:55
#757375
If i look at cam shafts they are looking like brand new "HOT" cams.
My 1975 Z 1 B 900 Project

www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
The following user(s) said Thank You: GPz550D1

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

  • rrsmsw9999
  • rrsmsw9999's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 775
  • Thanks: 65

Re: I broke number 3 cam bearing holder!!

22 Mar 2017 07:03
#757387
I would replace it with a used salvage one. That is going to vibrate and heat cycle over time. I think it will run the risk of loosening. Good news is it will be clanging long before it comes free. The machining will be tolerant with the cap, more tolerant than if it loosens and comes free. I suppose too you could locktite the bolts and reduce torque appropriately. Alternately, a good MIG/TIG guy could get that in a jig and spot weld the crack. Some heat deformity in the bracket shouldn't be too excessive. Good Luck. R
1980 KZ 1000E2
Crashed 6/2016

1980 KZ550A
Sold 3/2016
The following user(s) said Thank You: GPz550D1

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

  • slmjim+Z1BEBE
  • slmjim+Z1BEBE's Avatar
  • Offline
  • User
  • User
    Registered
  • Enjoy Life! IT HAS AN EXPIRATION DATE!
  • Posts: 1604
  • Thanks: 1066

Re: I have a problem!!

22 Mar 2017 07:07
#757388
peter1958 wrote: You can just run it like that.
Agreed. Conditionally. That being, it would be in the back of our minds, bugging us to no end.

The cap bolts carry the vertical loads imposed by the valve springs. Lateral thrust is essentially nil, being limited almost entirely by the camchain.

We see loose cam caps at Mid Ohio often. Maybe should begin stocking up on them...?

Good info in Peter1958's link too.

Good Ridin'
slmjim & Z1BEBE
A biker looks at your engine and chrome.
A Rider looks at your odometer and tags.

USA

1973 ('72 builds) Z1 x2
1974 Z1-A x2
1975 Z1-B x2
1993 CB 750 Nighthawk
2009 ST1300A

www.kawasaki-z-classik.com
A Forum tightly focused on all things Z1 and Z2.
The following user(s) said Thank You: GPz550D1

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

  • Kidkawie
  • Kidkawie's Avatar
  • Offline
  • User
  • User
    Registered
  • I bleed premix
  • Posts: 1924
  • Thanks: 246

Re: I have a problem!!

22 Mar 2017 08:24
#757396
What's the clearance spec? Find a coupla used caps and plastigauge it.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125
The following user(s) said Thank You: missionkz

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

  • zed1015
  • zed1015's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 3362
  • Thanks: 2072

Re: I broke number 3 cam bearing holder!!

22 Mar 2017 08:42
#757397
It will be just fine as is.
Can't really move anywhere.
No's 1 and 3 caps control camshaft end float though so you may want to fit locating dowels to the two bolts that don't have them for extra security or have the bridge spot Tigged with it in situ but have seen loads running like this with no issues.
Fitting a rogue cap from another head will put you deeper in the shit with additional fitting problems to address as they can be off in every plane which will cause even more damage if you don't know what you are doing.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
www.kzrider.com/forum/23-for-sale/611992...lide-mikunis?start=1






The following user(s) said Thank You: GPz550D1, SWest

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

  • Mikaw
  • Mikaw's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
    Registered
  • Posts: 4825
  • Thanks: 1852

Re: I broke number 3 cam bearing holder!!

30 Jul 2017 20:46
#768011
PM sent... I have bearing caps if you still need them
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
The following user(s) said Thank You: GPz550D1

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

  • jenkrider
  • jenkrider's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 78
  • Thanks: 3

Re: I broke number 3 cam bearing holder!!

01 Aug 2017 16:25
#768137
Off topic but I really dig that gloss black engine paint, I hope it holds up for ya. What kind is it?
76' KZ900
00' KLR650
82' XV920 Virago
74' Ironhead Sportster

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

Moderators: Street Fighter LTD
Powered by Kunena Forum