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Jetting: Lean in mid-range. Need advice.
- SWest
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- 10 22 2014
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20 Apr 2015 18:11 #668948
by SWest
Replied by SWest on topic Jetting: Lean in mid-range. Need advice.
Pull one and get the number.
Steve
Steve
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- TheForumTroll
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21 Apr 2015 09:55 #669007
by TheForumTroll
-[ KZ700-A1 '84 ]-
Replied by TheForumTroll on topic Jetting: Lean in mid-range. Need advice.
It says 4be4.
-[ KZ700-A1 '84 ]-
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- SWest
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21 Apr 2015 10:08 #669009
by SWest
Replied by SWest on topic Jetting: Lean in mid-range. Need advice.
You should be able to find a adjustable needle using that number. Try jetsrus.
Steve
Steve
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21 Apr 2015 11:39 #669017
by TheForumTroll
-[ KZ700-A1 '84 ]-
Replied by TheForumTroll on topic Jetting: Lean in mid-range. Need advice.
I'm completely lost looking at needles. Either they aren't available or I don't understand the number scheme at all. I can't find neither carbs nor needles :blush:
-[ KZ700-A1 '84 ]-
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- KZB2 650
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21 Apr 2015 12:24 #669022
by KZB2 650
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.
Replied by KZB2 650 on topic Jetting: Lean in mid-range. Need advice.
So you wouldn't advise him going with a washer for a single clipped nettle ?
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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- gd4now
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21 Apr 2015 13:30 - 22 Apr 2015 00:11 #669029
by gd4now
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
Replied by gd4now on topic Jetting: Lean in mid-range. Need advice.
Do not know if this will help you or not, but here is what I understand about the jet needle ID Mikuni use.
The first number is the length series. Lets take the series 4 needle. It could be 40.00-49.99mm in length. In turn a 5 could be 50.00-59.99mm in length.
The second and sometimes third characters being letters describe the taper from the clip end to the tip in 15second (1/4th of a degree) increments. For example "B" is 30 seconds, and "E" is 1 degree, 15 seconds. Therefore a "BE" would be a taper starting out at 30 seconds (1/2 degree), followed by a second taper of 1min 15sec.
The last digit be it one or two characters is the suffix or revision number. Example. 4D3, and 4D8 are the same style needle, similar in length and taper. However the taper may begin higher up on the needle than the other. This would make a smaller tip diameter, or a shorter needle. If shims, or clip positions were incorporated on one needle it is possible that it may effectively perform like the other.
Lastly there is sometimes a number designated by OEM's and this designates the clip position. Example: 5DP3-4. However this "-#" designation is not part of the needed part number.
One last note: A suffix number has the following unknown variables between one needle and another. Exact length, Major OD, Point of begining of taper in reference to clip position. Without physically measuring them there is no way to determine these characteristics just by looking at the part number.
The first number is the length series. Lets take the series 4 needle. It could be 40.00-49.99mm in length. In turn a 5 could be 50.00-59.99mm in length.
The second and sometimes third characters being letters describe the taper from the clip end to the tip in 15second (1/4th of a degree) increments. For example "B" is 30 seconds, and "E" is 1 degree, 15 seconds. Therefore a "BE" would be a taper starting out at 30 seconds (1/2 degree), followed by a second taper of 1min 15sec.
The last digit be it one or two characters is the suffix or revision number. Example. 4D3, and 4D8 are the same style needle, similar in length and taper. However the taper may begin higher up on the needle than the other. This would make a smaller tip diameter, or a shorter needle. If shims, or clip positions were incorporated on one needle it is possible that it may effectively perform like the other.
Lastly there is sometimes a number designated by OEM's and this designates the clip position. Example: 5DP3-4. However this "-#" designation is not part of the needed part number.
One last note: A suffix number has the following unknown variables between one needle and another. Exact length, Major OD, Point of begining of taper in reference to clip position. Without physically measuring them there is no way to determine these characteristics just by looking at the part number.
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
Last edit: 22 Apr 2015 00:11 by gd4now.
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