Z900 cam box cover

  • Andyp62
  • Andyp62's Avatar Topic Author
  • Offline
  • User
  • User
    Registered
  • Posts: 67
  • Thanks: 4

Z900 cam box cover

09 Feb 2026 10:12
#921345
Hi all
i have a 1978 Z650b2, us import, is it possible to fit a z900 cam box cover (with the rounded end caps ), and if so what modifications would be required? I have been told it can be done but would like to know if anyone has done this or has any tips to help .
thanks In anticipation 
1978 Z650 B2, US import to the UK

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

  • zed1015
  • zed1015's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 3228
  • Thanks: 1916

Re: Z900 cam box cover

09 Feb 2026 12:32 - 09 Feb 2026 12:49
#921347
Apart from a passing resemblance the 650 and 900/1000 cam covers are totally different and not interchangable no matter what you do .
You should be looking at the 750 zephyr engine which has a 900 style rounded cover that fits.
The 750 Zeph is based on the earlier z650/750 engines..
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
www.kzrider.com/23-for-sale/611992-air-c...lide-mikunis?start=0





Last edit: 09 Feb 2026 12:49 by zed1015.
The following user(s) said Thank You: StreetfighterKz

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

  • Injected
  • Injected's Avatar
  • Offline
  • User
  • User
    Registered
  • Posts: 1587
  • Thanks: 1132

Re: Z900 cam box cover

Yesterday 08:58 - Yesterday 09:05
#921372
Hi all
i have a 1978 Z650b2, us import, is it possible to fit a z900 cam box cover (with the rounded end caps ), and if so what modifications would be required? I have been told it can be done but would like to know if anyone has done this or has any tips to help .
thanks In anticipation 


 
Whoever told you this can be done is smoking some real powerful dope.

Here is a comparison of the two cam covers :

 

 

The 650 cover (at the top) is 23mm wider than the Z1 cover plus the bolt holes are way different. Like Zed1015 said the closest thing to a Z1 cover as far as "looks" is the 750 Zephyr cam cover (see below)

 

 
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
Last edit: Yesterday 09:05 by Injected. Reason: added pic

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

Moderators: Street Fighter LTD
Powered by Kunena Forum