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Out of control High idle during carb sync - help
- mp-43
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27 Sep 2013 23:49 #608077
by mp-43
Out of control High idle during carb sync - help was created by mp-43
Hi all,
Working on a 75 Z1B with a k&n filter, typical vm 28 running 117.5 main jets, 4 into 2 KZ1000 exhaust. Using a carbtune pro, just about got the vacuum balanced when the throttle started climbing. Backing off the main idle screw failed to correct this( currently not even making contact). Slackened the throttle cabled and the butterfly appears to be completely at rest. Idle settled around 4k when I shut it down. Waited, tried again, same results - idle jumps and will not back off. Disconnected carbtune and replaced the rubber port covers. Same results when started.
Float levels have been checked via the clear tube method and all are spot on. Mixture screws are all set to spec 1 1/4 turns out.
Clear case of dicking around in search of perfection when good enough was just fine.
Helpful tips are greatly appreciated.
Todd
Working on a 75 Z1B with a k&n filter, typical vm 28 running 117.5 main jets, 4 into 2 KZ1000 exhaust. Using a carbtune pro, just about got the vacuum balanced when the throttle started climbing. Backing off the main idle screw failed to correct this( currently not even making contact). Slackened the throttle cabled and the butterfly appears to be completely at rest. Idle settled around 4k when I shut it down. Waited, tried again, same results - idle jumps and will not back off. Disconnected carbtune and replaced the rubber port covers. Same results when started.
Float levels have been checked via the clear tube method and all are spot on. Mixture screws are all set to spec 1 1/4 turns out.
Clear case of dicking around in search of perfection when good enough was just fine.
Helpful tips are greatly appreciated.
Todd
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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28 Sep 2013 00:01 #608079
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 Out of control High idle during carb sync - help
Lower all 4 slides a few turns and start over. You have them lifted up to high on the adjustment.
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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- mp-43
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28 Sep 2013 00:06 #608082
by mp-43
Replied by mp-43 on topic Out of control High idle during carb sync - help
Thanks, MotorHead - to confirm--lowering the slides would be turning the adjustment screws in(R) or out(L)?
Much appreciated,
Todd
Much appreciated,
Todd
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28 Sep 2013 10:06 #608102
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 Out of control High idle during carb sync - help
I think if you read through this it will make it clear.
www.kzrider.com/filebase/doc_download/209-kzslidecarbtuning
www.kzrider.com/filebase/doc_download/209-kzslidecarbtuning
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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29 Sep 2013 00:05 #608165
by mp-43
Replied by mp-43 on topic Out of control High idle during carb sync - help
Dialed it back down - got them tuned and running well. Thanks again.
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