Welcome, Guest
Username: Password: Remember me

TOPIC:

76 KZ 750 B Twin issues 04 Jul 2021 15:33 #851274

  • Mikaw
  • Mikaw's Avatar
  • Away
  • Sustaining Member
  • Posts: 3222
  • Thank you received: 810
Sorry maybe someone else gets an idea from your video. I can’t tell what the rpm is doing in relationship to the throttle. I don’t see excessive smoke.  From idle when you start to twist the throttle does it climb in rpm then want to sputter and stall. Can you get any higher into the rpms by feathering the throttle back a little and then on more. Can you get above 3.5k at all?
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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

Last edit: by Mikaw.

76 KZ 750 B Twin issues 04 Jul 2021 15:41 #851277

  • Mikaw
  • Mikaw's Avatar
  • Away
  • Sustaining Member
  • Posts: 3222
  • Thank you received: 810
  1. Factory air box?
  2. Air filter? 
  3. Try watching the fuel filter, does it constantly have fuel or does it get empty?
  4. vent nipples/hoses on carbs open to atmosphere? 
  5. try leaving the tank cap open. Please be sure fuel level is below top of tank enough so fuel with not spill out from vibration.
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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

76 KZ 750 B Twin issues 04 Jul 2021 15:59 #851281

  • Shade2k76
  • Shade2k76's Avatar Topic Author
  • Offline
  • User
  • Posts: 26
  • Thank you received: 1
factory air box, filter in, can not see through fuel filter (unfortunately), all vents / nipples open, cap open,  same results.

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

76 KZ 750 B Twin issues 04 Jul 2021 16:34 #851283

  • Mikaw
  • Mikaw's Avatar
  • Away
  • Sustaining Member
  • Posts: 3222
  • Thank you received: 810
Ok pickings getting thin

Here is a question for the electric guru’s
Can a bad condenser cause the OP’s issue?
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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

76 KZ 750 B Twin issues 05 Jul 2021 07:58 #851322

  • Shade2k76
  • Shade2k76's Avatar Topic Author
  • Offline
  • User
  • Posts: 26
  • Thank you received: 1

Ok pickings getting thin

 

I agree.  I think that is why I am getting so frustrated with it...

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

76 KZ 750 B Twin issues 05 Jul 2021 09:57 #851333

  • Mikaw
  • Mikaw's Avatar
  • Away
  • Sustaining Member
  • Posts: 3222
  • Thank you received: 810
You said you bought a new coil. Did you get the correct ohm rating in the new coil. Have you started it in the dark? Are the points sparking a lot?
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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

76 KZ 750 B Twin issues 06 Jul 2021 06:00 #851368

  • Shade2k76
  • Shade2k76's Avatar Topic Author
  • Offline
  • User
  • Posts: 26
  • Thank you received: 1

Is it possible that the main jets ( #45 in the crappy quality diagram) are missing?

www.partzilla.com/catalog/kawasaki/motor...etors-kz750-b1-b2-b3

last night,  pulled the carbs,  and this is indeed the issue.
Waiting on a carb rebuild kit to arrive.
Thank you all for your help.

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

76 KZ 750 B Twin issues 06 Jul 2021 11:54 #851390

  • TexasKZ
  • TexasKZ's Avatar
  • Offline
  • Platinum Member
  • Posts: 6073
  • Thank you received: 1488
You are welcome. I hope you got the kit from Keyster. Jets are precision parts, and there are some really crappy ones out there. It is best to use the genuine articles. Sellers like SUDCO, Partzilla  and Jets R Us handle the real deal. Z1E may also have them.
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.

76 KZ 750 B Twin issues 13 Jul 2021 14:01 #851672

  • Shade2k76
  • Shade2k76's Avatar Topic Author
  • Offline
  • User
  • Posts: 26
  • Thank you received: 1
*UPDATE*  It is AMAZING what happens when you have the carbs put togeather entirely....
(The rebuild kit arrived yesterday.  put all new jets, (including the 2 missing pilot jets) 
She has her spirit and muscle back.  On the stand reved to 5k easily, and even on a quick twist of the throttle, she jumps to 4.5 without missing a beat.  Now, if only it would stop raining so I can get some seat time before my rider course this weekend.

Thank you all VERY much for your input and assistance.

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

Powered by Kunena Forum