Jet kits?
- Serpent7
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I currently have a stage 1 jet kit on my mikuni 28 carbs. I was wondering, should I upgrade to a stage 2, or stage 3 jet kit? My bike runs well, and idles just OK now.
What are the benefits of upgrading my jets in my carb to a stage 2, or 3?
If you had this same set-up, which jet kit would you go with?
How will going to a stage 2, or stage 3 jet kit affect my gas mileage, and put-puts around town?
19 Audi Q5
14 Volkswagen Touareg X
97 Honda Shadow Spirit
79 Kawasaki KZ1000 st
79 Volkswagen Transporter
73 Volkswagen Thing
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- StreetfighterKz
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A normal set up would be either 2.5-3 turns out on the stock pilot or 1 size larger and a couple steps up larger on the main. Perhaps shim the needle if needed. Done!
Later, Doug
1978 z1000 Streetfighter
1976 z900 Stripfighter (work in progress)
1983 Gpz750 Resto-Mod
1989 Vmax
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- koolaid_kid
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Your bike is on the needle most of the time, and DynoJet claims they spend the bulk of their time refining the taper of the needle for maximum performance. Since you already have the needle, all you need are larger main jets. 2-3 sizes might just do it.
1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- sbc1320
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1980 KZ1000 LTD-B4(MK II engine) - Progressive suspension, MTC pistons, Dynojet Stage III, all wear items replaced, WFO paint scheme(1978), etc..
Past bikes- 2 1976 Kz900's, 5 1975-76 Honda CB750's, Honda 500 -4, Honda 250, Honda 125, Honda 100, Suzuki RM 250, Honda XL350, Kawasaki KLR 650, etc..
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- koolaid_kid
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1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- Serpent7
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sbc1320 wrote: My 1000 came to me with the Dyanjet Stage III kits installed. Mine has 145 mains and stock pilots I believe from going over my paperwork. According to the cross reference my Dynojet 145's equal to a 131 main jet. My bike is setup the same as your's, but has MTC 10.5 pistons on a stock bore. My carbs are 28 pumpers and work well.
So…. (and I'm new to the carb scene) All I heed to do is purchase the main jets in either 131, or 130 (oem), or Dyno Jets 145's and I'm at a stage 3 jet kit? How many main jets do I need?
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97 Honda Shadow Spirit
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73 Volkswagen Thing
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- sbc1320
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Serpent7 wrote:
sbc1320 wrote: My 1000 came to me with the Dyanjet Stage III kits installed. Mine has 145 mains and stock pilots I believe from going over my paperwork. According to the cross reference my Dynojet 145's equal to a 131 main jet. My bike is setup the same as your's, but has MTC 10.5 pistons on a stock bore. My carbs are 28 pumpers and work well.
So…. (and I'm new to the carb scene) All I heed to do is purchase the main jets in either 131, or 130 (oem), or Dyno Jets 145's and I'm at a stage 3 jet kit? How many main jets do I need?
You would need 4 main jets. Mine is equal to a 131, but they only come in increments of 2.5 so if stock jets are used it would be a 130 or a 132.5. Mine has added compression so you shouldn't need quiet as big as mine I would think. Once you run it hard you are supposed to shut the engine off and check the plugs to make sure they are not too lean. Too much idling and you can't read the plugs. You would probably come in at around a 120 to a 125(stock jets, not Dynojets) I am guessing.
What size are in your's now?
1980 KZ1000 LTD-B4(MK II engine) - Progressive suspension, MTC pistons, Dynojet Stage III, all wear items replaced, WFO paint scheme(1978), etc..
Past bikes- 2 1976 Kz900's, 5 1975-76 Honda CB750's, Honda 500 -4, Honda 250, Honda 125, Honda 100, Suzuki RM 250, Honda XL350, Kawasaki KLR 650, etc..
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- koolaid_kid
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Yes, that would put you at a Stage 3 kit. Personally, when I am targeting a particular number, such as 145, I prefer to go ahead and order the size below and above, just in case. You will end up with 12 unused jets, but you will be able to fine tune it without waiting for more jets to arrive if 145 is not the perfect number.Serpent7 wrote:
sbc1320 wrote: My 1000 came to me with the Dyanjet Stage III kits installed. Mine has 145 mains and stock pilots I believe from going over my paperwork. According to the cross reference my Dynojet 145's equal to a 131 main jet. My bike is setup the same as your's, but has MTC 10.5 pistons on a stock bore. My carbs are 28 pumpers and work well.
So…. (and I'm new to the carb scene) All I heed to do is purchase the main jets in either 131, or 130 (oem), or Dyno Jets 145's and I'm at a stage 3 jet kit? How many main jets do I need?
1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- Serpent7
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19 Audi Q5
14 Volkswagen Touareg X
97 Honda Shadow Spirit
79 Kawasaki KZ1000 st
79 Volkswagen Transporter
73 Volkswagen Thing
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- Nebr_Rex
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2002 ZRX1200R
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79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
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- TexasKZ
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1982 KZ1000 LTD parts donor
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- koolaid_kid
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Nope. Just main jets.Serpent7 wrote: Ok!I think I got it now... Last question is, I need needle jets, right?
1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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