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29mm smoothbore setup?
- Patton
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23 Apr 2008 20:16 - 23 Apr 2008 20:30 #208597
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic 29mm smoothbore setup?
My 29's have a tiny removeable brass air jet fitted just inside entrance to the air passageway in the pilot circuit. It is #12 on the following diagram (Part No. BS/97 Air Jet). However, I understand some 29's have a non-removeable pressed-in air jet, but am unfamilar with the pressed-in type.
[please see better pic in next post]
Am thinking if the jet is possibly missing, too much air could be allowed to the pilot jet thereby cauiing an over-lean mixture. Or if either type air jet has been "reamed" larger by cleaning efforts, could result in the same too much air problem.
Will show the BS/97 Air Jet in a separate post.
Just random thoughts.
Good Luck!
[please see better pic in next post]
Am thinking if the jet is possibly missing, too much air could be allowed to the pilot jet thereby cauiing an over-lean mixture. Or if either type air jet has been "reamed" larger by cleaning efforts, could result in the same too much air problem.
Will show the BS/97 Air Jet in a separate post.
Just random thoughts.
Good Luck!
1973 Z1
KZ900 LTD
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Last edit: 23 Apr 2008 20:30 by Patton.
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23 Apr 2008 20:19 - 23 Apr 2008 20:28 #208598
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic 29mm smoothbore setup?
1973 Z1
KZ900 LTD
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Last edit: 23 Apr 2008 20:28 by Patton.
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- jtmcculloch
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23 Apr 2008 20:24 #208600
by jtmcculloch
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
Replied by jtmcculloch on topic 29mm smoothbore setup?
Thanks Patton, I will be sure to check that out.
I checked to make sure there no obstructions but no the size or even if anything was missing. But that is a good point I will be sure to check.
I checked to make sure there no obstructions but no the size or even if anything was missing. But that is a good point I will be sure to check.
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
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23 Apr 2008 20:24 #208601
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic 29mm smoothbore setup?
1973 Z1
KZ900 LTD
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- jtmcculloch
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02 Apr 2009 05:08 #277631
by jtmcculloch
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
Replied by jtmcculloch on topic 29mm smoothbore setup?
I see I never updated this thread.
The float height should be 23mm.
I took an extra fuel bowl plug, drilled it and installed a tube and hose to check the float level
I found the float level was too low.
The cure was to Raise the Float level, remove the 140 mains and go with 122.5 mains.
My carb does not have brass floats - it has black plastic floats. I am guessing that it came with brass floats and someone changed them out and the float level needed to be differant than the listed specs.
The float height should be 23mm.
I took an extra fuel bowl plug, drilled it and installed a tube and hose to check the float level
I found the float level was too low.
The cure was to Raise the Float level, remove the 140 mains and go with 122.5 mains.
My carb does not have brass floats - it has black plastic floats. I am guessing that it came with brass floats and someone changed them out and the float level needed to be differant than the listed specs.
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
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- roy-b-boy-b
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02 Apr 2009 05:14 #277632
by roy-b-boy-b
1979 LTD Street Fighter.1977 KZ1000
Replied by roy-b-boy-b on topic 29mm smoothbore setup?
Thanks for getting back on this post.
I bet the bike really scoots now! Roy
I bet the bike really scoots now! Roy
1979 LTD Street Fighter.1977 KZ1000
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02 Apr 2009 06:20 #277645
by jtmcculloch
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
Replied by jtmcculloch on topic 29mm smoothbore setup?
that is an understatment
tons of power and torque.
tons of power and torque.
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
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02 Apr 2009 10:13 #277700
by mtkawboy
78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned
Replied by mtkawboy on topic 29mm smoothbore setup?
33 year old 1105 Superbike Mike motor, 10.25-1, ported head, SBM 395 lift street cams, Kerker pipe 17.5 pilots and 120 mains, std needle setting @ 3700 ft in Momtana. Idle mix screw about 1/2 turn out. Doesnt it foul plugs that rich, sounds like a major vacuum leak to me.
78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned
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02 Apr 2009 11:56 - 02 Apr 2009 11:57 #277710
by jtmcculloch
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
Replied by jtmcculloch on topic 29mm smoothbore setup?
the problem was that it was too lean due to the float level being too low.
I have black plastic floats. I am thinking that the float level specs I found are for the brass floats and someone changed them out for the plastic floats. these floats when set to 23mm made the float level about 5mm too low when checked with a clear tube. raising the float level cured the problem. There is no telling what kind of carbs my floats came from.
I have black plastic floats. I am thinking that the float level specs I found are for the brass floats and someone changed them out for the plastic floats. these floats when set to 23mm made the float level about 5mm too low when checked with a clear tube. raising the float level cured the problem. There is no telling what kind of carbs my floats came from.
76 KZ1075
93 ZR1100
71 Moto-guzzi 750
2001 ZR-7S
Last edit: 02 Apr 2009 11:57 by jtmcculloch. Reason: correct spelling
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