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Mikuni Jet Issue ?
- BIGKEVIN
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04 Feb 2013 20:21 #570773
by BIGKEVIN
1976 KZ900
2006 ZX6R
Replied by BIGKEVIN on topic Mikuni Jet Issue ?
OK I will try adjusting the air screws. Is is also possible that I will need to pull the tops off of the cards and sync then that way or should I do the air screws first ?
1976 KZ900
2006 ZX6R
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- Kitten Tooth
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04 Feb 2013 20:40 #570775
by Kitten Tooth
1981 Kawasaki KZ1000-K LTD
1983 Suzuki GS300L-D
1982 Suzuki GS300L-Z sold:(
1976 KZ400D3
1973 Z900... I WISH
DO A BARREL ROLL!!
Replied by Kitten Tooth on topic Mikuni Jet Issue ?
Take care to check the need and seat valve assembly inside the carbs. If there is a seat that is all clogged up, that cylinder will be starved of fuel.. might run fine at idle but misfire at higher RPMs.
1981 Kawasaki KZ1000-K LTD
1983 Suzuki GS300L-D
1982 Suzuki GS300L-Z sold:(
1976 KZ400D3
1973 Z900... I WISH
DO A BARREL ROLL!!
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- BIGKEVIN
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04 Feb 2013 22:16 #570792
by BIGKEVIN
1976 KZ900
2006 ZX6R
Replied by BIGKEVIN on topic Mikuni Jet Issue ?
What should be the starting point for the air screws with my current setup ? K&N pods and a Vance and Hines 4 into 1 pipe with no baffle ?
1976 KZ900
2006 ZX6R
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- Patton
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05 Feb 2013 00:51 #570825
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic Mikuni Jet Issue ?
1½ turns out from lightly seated.
Good Fortune!
Good Fortune!
1973 Z1
KZ900 LTD
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- BIGKEVIN
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05 Feb 2013 21:00 #570942
by BIGKEVIN
1976 KZ900
2006 ZX6R
Replied by BIGKEVIN on topic Mikuni Jet Issue ?
I set all 4 air screws to 1 and 1/2 turns out. Warmed the bike up and had it idling just over 1,000 rpms. Did some turning of the screws while listening to the engine and watching the tach for highest rpm. After getting them adjusted and letting the bike run for a few minutes, I pulled the plugs and the #1 plug is starting to turn a greyish color. THe #3 plug is greyish. The #2 and #4 plugs are still sotty. I will continue to adjust those 2 air screws to see if I can get those plugs to change also.
1976 KZ900
2006 ZX6R
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- Patton
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05 Feb 2013 22:47 #570962
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic Mikuni Jet Issue ?
If not already doing so, it's a good idea to run an electric fan blowing air over the engine during the carb tuning process while the bike is sitting there idling.
This is to keep the engine from over-heating.
Good Fortune!
This is to keep the engine from over-heating.
Good Fortune!
1973 Z1
KZ900 LTD
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- BIGKEVIN
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12 Feb 2013 20:55 #572142
by BIGKEVIN
1976 KZ900
2006 ZX6R
Replied by BIGKEVIN on topic Mikuni Jet Issue ?
I finally got back to working on this. I do keep a fan cooling the engine while I am making adjustments to the carbs. I have all 4 air screws turned to the higher idle, but I do not see any fluid being pulled into the tubes on the Motion Pro carb tuning tool on the #2 and #4 cyclinders. I sprayed water on the pipes and all 4 sizzle and then evaporates. Any idea what could cause 2 cyclinders to not have any suction and the other 2 not to have any ?
1976 KZ900
2006 ZX6R
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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15 Feb 2013 10:44 #572471
by Motor Head
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Replied by Motor Head on topic Mikuni Jet Issue ?
If I read your question right, two have more vacuum than the other two. Then you need to adjust the slide height to change the vacuum so they are the same on all 4. This is the Dynamic Running Sync that the carb sticks/ manometer is for, or vacuum gauges. All 4 should pull the same vacuum if adjusted correctly, and everything else correct.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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