Welcome, Guest
Username: Password: Remember me

TOPIC: 28mm VM carbs

28mm VM carbs 26 Oct 2019 07:32 #813054

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Hello all, I recently got a full set of 28mm VM carbs off eBay. I have an 86 Kz 1000p with the original carbs . I’m wanting to put these (old school) carbs on it ,no particular reason I like trying different things and learning different stuff. But I don’t know the year model of these carbs or what original bike they were on the only stamped number I found was on the cross member it’s 120 over 5, does anybody know what these are exactly, thanks for reading guys
1986 KZ1000P
2005 Vmax

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

28mm VM carbs 26 Oct 2019 08:08 #813057

  • zed1015
  • zed1015's Avatar
  • Offline
  • Member
  • Member
  • Posts: 1593
  • Thank you received: 565
Pics would be of more help.
You will need a set of earlier (smaller) Z9/Z1000 inlet rubbers also to fit them.

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

28mm VM carbs 26 Oct 2019 08:46 #813059

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Yea I found the carb holders at Z1.these pics ain’t that great , it was when I was taking them apart to clean them.
1986 KZ1000P
2005 Vmax
Attachments:

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

28mm VM carbs 26 Oct 2019 08:49 #813060

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
1986 KZ1000P
2005 Vmax
Attachments:

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

28mm VM carbs 26 Oct 2019 09:08 #813063

  • Nessism
  • Nessism's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 4485
  • Thank you received: 1183
Wow! Those carbs look like a nightmare. Please don't install them as is and expect them to run. They need a complete rebuild including unganging. Personally, I'd strip off the red paint straight away. They have provision for an accelerator pump too so you need to sort out that business (either get it working or disable it.)

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

28mm VM carbs 26 Oct 2019 09:17 #813065

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Already started cleaning, just want to order any parts till I find out year / model
1986 KZ1000P
2005 Vmax
Attachments:

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

28mm VM carbs 26 Oct 2019 09:34 #813066

  • Nessism
  • Nessism's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 4485
  • Thank you received: 1183
Okay good. You might want to check Partzilla and try to match up the carbs to the bike they came from originally. Should be late 70's 1000. Check current jet sizes and try to recycle them assuming they are stock. I'll take a stock Mikuni jet (after cleaning) over a new aftermarket jet any day. You will need to source soft parts like O-rings and gaskets of course. Z1 Enterprises should be able to help with that.

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

28mm VM carbs 26 Oct 2019 09:46 #813068

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Ok ,yea I used partzilla a lot over the years, the eBay ad said (drag bike). I can’t quite make out the numbers on the main jet , but believe the pilot is 20. And the jet needles are longer and more tapered compared to other needles I got laying around off of other bikes I have had.I found a rebuilt kit for the pumper but the very bottom part is a sensor ,that’s if I read everything correctly. I would like the pumper to work but I’m not needing a sensor. Can that be left like it is or does it need to be capped , I didn’t see where it could leak but I’m not sure. This is going to be a learn as I go sorta thing.
1986 KZ1000P
2005 Vmax

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

28mm VM carbs 26 Oct 2019 12:03 #813073

  • 73z1
  • 73z1's Avatar
  • Offline
  • Member
  • Member
  • Posts: 105
  • Thank you received: 6
79 or later, accelerator pump
Oink Johnson had a huge pile of parts

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

28mm VM carbs 26 Oct 2019 12:17 #813075

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2

73z1 wrote: 79 or later, accelerator pump
Oink Johnson had a huge pile of parts

How would I get a hold of him cause I’ve been looking for that sensor cap and can’t find one anywhere.
1986 KZ1000P
2005 Vmax

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

28mm VM carbs 26 Oct 2019 12:46 #813076

  • zed1015
  • zed1015's Avatar
  • Offline
  • Member
  • Member
  • Posts: 1593
  • Thank you received: 565
Good score on those 28mm pumpers.
The best Mikunis of the bunch fitted to a stock bike.
Originally fitted to USA Z1R's , MK2's and possibly ST's
The triangular casting is blank and does not need any parts or cap so leave as is.
The triangle diapragm was only used on the 26mm version and funnily they were the worst of the bunch.

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

Last edit: by zed1015.

28mm VM carbs 26 Oct 2019 13:14 #813077

  • mike1957
  • mike1957's Avatar
  • Offline
  • Member
  • Member
  • Posts: 63
  • Thank you received: 8
you can find oink Johnsond on e bay just start your search for kz 900 or kz 1000 parts on e bay
mike1957
The following user(s) said Thank You: Zilla

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

28mm VM carbs 26 Oct 2019 14:01 #813081

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2

zed1015 wrote: Good score on those 28mm pumpers.
The best Mikunis of the bunch fitted to a stock bike.
Originally fitted to USA Z1R's , MK2's and possibly ST's
The triangular casting is blank and does not need any parts or cap so leave as is.
The triangle diapragm was only used on the 26mm version and funnily they were the worst of the bunch.

oh ok, thanks, I was taking a chance on them cause I don’t know a lot bout this style carb I won a bid on eBay got less than a 100 shipping included.
1986 KZ1000P
2005 Vmax

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

28mm VM carbs 29 Oct 2019 17:18 #813235

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Ok guys, got the carbs clean in and out, reused main jet (120) pilot jet (17.5), new o rings gaskets and float valve seat and needle. So put them on the bike fired up fairly easy. My problem started when I tired to sync them, it was idling high so went to back on idle screw but it wasn’t even touching the throttle stop, so it idled down when I started adjusting each needle but then it turned into me chasing each cylinder. So I done something wrong or I missed a step so any help would be appreciated.
1986 KZ1000P
2005 Vmax
Attachments:

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

28mm VM carbs 29 Oct 2019 17:27 #813236

  • Nessism
  • Nessism's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 4485
  • Thank you received: 1183
If the slide adjusters (sync screws) are adjusted so the slides are too far open the engine will race and the throttle stop won't be effective. You may need to go back and mechanically sync the slides lower in the carb bores.

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

28mm VM carbs 29 Oct 2019 17:32 #813238

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Ok , bench sync, is there a certain cap I need to shoot for, I noticed the small cut out when the slides are all the way down, does it idle off that section?
1986 KZ1000P
2005 Vmax

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

28mm VM carbs 29 Oct 2019 18:18 #813239

  • Nessism
  • Nessism's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 4485
  • Thank you received: 1183
I'm not sure exactly how far open to set the slides but lower than where you have them now would be a good starting point.

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

28mm VM carbs 29 Oct 2019 18:20 #813241

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2
Ok I will try that tomorrow, I appreciate the advice.
1986 KZ1000P
2005 Vmax

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

28mm VM carbs 30 Oct 2019 08:41 #813253

  • hardrockminer
  • hardrockminer's Avatar
  • Offline
  • Sustaining Member
  • Sustaining Member
  • Posts: 618
  • Thank you received: 186
They should be set at about 0.5mm to 0.7mm open, including the little space on the bottom. I use a piece of 20 gauge copper wire to set mine. You can get the wire at any Home Depot in the picture hanging wire section.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.

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

28mm VM carbs 30 Oct 2019 09:48 #813264

  • Zilla
  • Zilla's Avatar Topic Author
  • Offline
  • Member
  • Member
  • Posts: 57
  • Thank you received: 2

hardrockminer wrote: They should be set at about 0.5mm to 0.7mm open, including the little space on the bottom. I use a piece of 20 gauge copper wire to set mine. You can get the wire at any Home Depot in the picture hanging wire section.[/quote

Ok, do u put the wire next to the little notch or under it. I might have some of that wire laying around , I know I got fence wire and electrical wire in the garage.

1986 KZ1000P
2005 Vmax

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

Powered by Kunena Forum