Welcome, Guest
Username: Password: Remember me
Forgot your password? Forgot your username? Create an account
Forum
Technical Forums
Engine
kz900 1976
  • Page:
  • 1
  • 2

TOPIC:

kz900 1976 26 Jan 2019 17:24 #797612

  • djbragg
  • djbragg's Avatar Topic Author
  • Offline
  • User
  • Posts: 21
  • Thank you received: 0
1976 KZ 900 starts but won't idle, plugs looked wet when i took them out. Static timed the engine, carbs looked synched. (29 mm smooth bores) Cylinders don't all seem to be firing until I rev the engine. Dyna S ignition with 3 ohm accel coils. Done all the things I have been told on this site. Have not repacked coils yet. Any ideas for me here.

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

kz900 1976 26 Jan 2019 17:34 #797615

  • Street Fighter LTD
  • Street Fighter LTD's Avatar
  • Away
  • Moderator
  • TURBO, Its Better to be Blown than Injected
  • Posts: 4818
  • Thank you received: 1967
Need more info.
Have you checked for quality of spark ? Did you put in new plugs and recheck how motor runs
Define sync looks OK ??????
Condition of carbs and rebuild status.
Compression ?
Condition of valves and seals
Valve lash ??

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn

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

kz900 1976 26 Jan 2019 17:38 #797617

  • loudhvx
  • loudhvx's Avatar
  • Offline
  • KZr Legend
  • Posts: 10868
  • Thank you received: 1615
Also, have you done the water spray test on the exhaust pipes? That will tell you which cylinders are firing and which aren't, if you can get it to run long enough.

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

kz900 1976 26 Jan 2019 17:48 #797621

  • Scirocco
  • Scirocco's Avatar
  • Offline
  • Premium Member
  • Never change a running system
  • Posts: 3923
  • Thank you received: 1894
Sounds like your bike is running a fat air/fuel mix.
One of the float needles is stuck or enrichment circuit Problem.

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

kz900 1976 26 Jan 2019 18:00 #797623

  • djbragg
  • djbragg's Avatar Topic Author
  • Offline
  • User
  • Posts: 21
  • Thank you received: 0
checked spark and all 4 have spark, have to rev engine to keep it running so sync is at 2500 rpm or so, new 8 bes plugs, Carbs cleaned and all jets cleaned and no new parts except for float bowl gaskets and o ring on air screw adjusters. Checked compression and all cylinders seem ok, may have to get a new compression checker. Valve clearance within tolerance or real close. Don't know about valve seals. What is valve lash?
Thanks for your help

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

kz900 1976 26 Jan 2019 18:01 #797624

  • djbragg
  • djbragg's Avatar Topic Author
  • Offline
  • User
  • Posts: 21
  • Thank you received: 0
Checked float needle when I cleaned carbs all seemed fine.

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

kz900 1976 26 Jan 2019 18:07 #797627

  • djbragg
  • djbragg's Avatar Topic Author
  • Offline
  • User
  • Posts: 21
  • Thank you received: 0
what is enrichment circuit

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

kz900 1976 26 Jan 2019 18:17 #797628

  • Street Fighter LTD
  • Street Fighter LTD's Avatar
  • Away
  • Moderator
  • TURBO, Its Better to be Blown than Injected
  • Posts: 4818
  • Thank you received: 1967
Do you have a manual ?

Valve lash is clearance between cam lobes and valve shims which are in valve buckets over valve retainers and valve stems

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn

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

kz900 1976 26 Jan 2019 19:41 #797646

  • hardrockminer
  • hardrockminer's Avatar
  • Offline
  • Sustaining Member
  • Posts: 2924
  • Thank you received: 1021
You need compression, spark and fuel, and you say you have all three. The engine starts and runs but won't idle. Sounds like a carb issue...possibly float height.
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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

kz900 1976 26 Jan 2019 19:46 #797650

  • Scirocco
  • Scirocco's Avatar
  • Offline
  • Premium Member
  • Never change a running system
  • Posts: 3923
  • Thank you received: 1894
Check your ignition Timing/Points gap

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

kz900 1976 26 Jan 2019 19:49 #797651

  • Street Fighter LTD
  • Street Fighter LTD's Avatar
  • Away
  • Moderator
  • TURBO, Its Better to be Blown than Injected
  • Posts: 4818
  • Thank you received: 1967

Scirocco wrote: Check your ignition Timing/Points gap


No Points Dyna S

Original owner 78 1000 LTD
Mr Turbo Race Kit, MTC 1075 Turbo pistons by PitStop Performance , Falicon Ultra Lite Super Crank, APE everything. Les Holt @ PDM's Billet Goodies . Frame by Chuck Kurzawa @ Logghe Chassis . Deep sump 5qt oil pan. RIP Bill Hahn

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

kz900 1976 26 Jan 2019 19:53 #797652

  • Scirocco
  • Scirocco's Avatar
  • Offline
  • Premium Member
  • Never change a running system
  • Posts: 3923
  • Thank you received: 1894
He do a static Timing only.

Please Log in or Create an account to join the conversation.
  • Page:
  • 1
  • 2
Forum
Technical Forums
Engine
kz900 1976
Powered by Kunena Forum
PDM Custom Fabrications
Half Evil Customs