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28mm Mikunis Better Than 29mm Smoothbores?
- 79MKII
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Immaculate vm28mm pumper carburetors refurbished. Nicest set I personally have seen, and are better than new , very nice outer chrome bowls and tops. Jetted with 17.5 pilots and 117.5 mains for 4 into one exhaust.New orings throughout and bench synchronized.Very very rare set with the idle adjustment at the top as well as 2 fuel inlets, with double diaphragm pumper on #2 carb.You won't find these anywhere. From the research and reading I have done these out perform 29mm smoothbores when it comes to racing, kz forums. Don't take my word, Google it.see below ...
Mikuni made another mistake with their 29mm smoothbores. Remember the smoothbore insert that supposedly allowed more air to flow through the carb, than the OEM 26mm carbs. Well, it turns out that the insert actually killed low speed jet signals, reducing low and mid range performance. Some people would call it a flat spot. In our drag strip tests we found that an OEM 28mm carb (Z-1 or Z-1R) actually outperformed the 29s at the drag strip. The 29s flowed more wide open, but the 28s has better low and mid range mixture control, power, and that is what wins races.
The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
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- 79MKII
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The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
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- 79MKII
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The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
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- KZB2 650
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1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
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- redhawk4
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I have no experience of which is better, but I don't see how a set of carbs like that could be worth $650.
1978 KZ1000A2 Wiseco 1075 kit
1977 KZ650B1
1973 Triumph Tiger TR7V
1968 BSA Victor Special 441
2015 Triumph Thunderbird LT
1980 Suzuki SP400
Old enough to know better, still too young to care
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- kaw-a-holic
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Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project
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- Rockranch
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(2)-1976 KZ900B-LTD's
1-all stock low mileage...
1 modified
1977 KZ1000 (awaiting resurrection!)
...and an old school Honda CB750 Chopper is next on my bucket list!
Oh...and a Pocket Rocket lol!!!
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- darlington
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- S. Darlington
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ei. On my 1983 KZ 750 superbike w 31mm CRs I went from the stock 125 main to 105 and I went two sizes leaner on the needle. It took hours to get it to perform well. Pulls really good now.
Keeping the good times rolling since 1982. Helping people with parts ,technical support and service of the 70's 80's Kawasakis. Building road bike bikes for individuals involved in Vintage Road Racing in the eastern Ontario region.
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- 79MKII
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The Kaw List:
Current: 79 KZ1000 A3 MKII, 78 KZ1000 A2, 78 KZ1000 Z1-R, 78 KZ650 SR, 80 KE175
Former: 03 KLX400SR, 99 ZRX1000, 82 KZ750 LTD, 80 KZ1000 A4 MKII, 80 KZ1000 LTD, 78 KZ1000 A2, 74 H-2 750 Triple, 78 KL250
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- Rockranch
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Vroom-vroom!
(2)-1976 KZ900B-LTD's
1-all stock low mileage...
1 modified
1977 KZ1000 (awaiting resurrection!)
...and an old school Honda CB750 Chopper is next on my bucket list!
Oh...and a Pocket Rocket lol!!!
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- z1kzonly
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79MKII wrote: Looking at these again....they're just regular 28mm pumpers from the '79 and '80 1000's, right?
Yes! that's all they are. They were on Mark II's also. Just the start of "tree huggingness" for the EPA Liberals! Factory had to lean out the motorcycles to pass emission tests to enter the USA. Don't forget about the smog head also for the Mark II's at the same time.
That's why these 1000cc OEM bikes came with only 105 or 107.5 main jets. The accelerator pump gave it a little blast of gas for throttle response. Too bad, I trashed a couple over the years, I was too cheap to buy the rebuild kit for the pump.
They are just very nice stock carbs. Nice for a correct restoration. I would only pay 1/2 the $$ maybe? If I even needed them.
That's my 2 cents worth.
Livin in "CheektaVegas, NY
Went thru 25 of these in 40 yrs.
I SOLD OUT! THE KAW BARN IS EMPTY.
More room for The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!
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- Street Fighter LTD
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- TURBO, Its Better to be Blown than Injected
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I went to 29mm SB carbs and now could beat him every time. These 2 bikes repeated these races at least 1000 times
Then he added a Winning Header and he was now dead even every time.
I then added a Yoshimura pipe to my bike and was again the winner every time
Both to this point had stock motors. so carbs and pipes were only variables.
Hope this helps
Dave
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
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