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The Gunson Colortune tool
- zukdave
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from Z1 the peice came with a Sudco sticker so I'd think Z1
source's them from Sudco.
1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.
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- FaultedGeologist
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- The truly educated never graduate...
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zukdave wrote: If the mech. sync is not done BEFORE any tuning you will not get the screw's any were near even
just as OMR said his ain't close to even turn's out.
OK flame on.
Can someone answer this question please? The local bike repair shop owner stated that I needed to resolve the carb issues regarding not getting a cylinder firing and the air fuel mix. Only then would it be worth it to vac sync the carbs. Do I Need to vac sync or perfect the air/fuel first?? Or, do I run air/fuel, then vac sync, then confirm A/F???
Previously my 3rd cylinder was not firing, so I replaced the A/F needles on Keihin CV34 carbs. The 3rd cylinder required around 3-4 turns out to get the exhaust warm.
I just got the Gunson Colortune in the mail, and I am excited to use it.
BTW, here is the most recent manual: gunson.co.uk/items/pdf/Products/G4074-English.pdf
Questions: (pages will not
1) page 12 - Do I have the Variable Choke Carb or Slide Type Carb? Both sound applicable.
2) page 15 - Multible throttle body injection - help...
Clint
1980 KZ750 LTD H4
FSMaunual: kz.bike-night.com/media/GPz750-full.pdf
Stock except for:
New chain and sprocket (530?).
Dynatek Ignition
Manual tensioner on the way.
Buy JIS screwdrivers.
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- Stazi
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I think you have to use an iterative approach. Hook up you carb sync manometer, balance the carbs and then tune each cylinder with the Gunson, then check the balance and adjust if necessary and then recheck with the Gunson.. Each adjustment (fuel vs balance) will affect the other.FaultedGeologist wrote:
zukdave wrote: If the mech. sync is not done BEFORE any tuning you will not get the screw's any were near even
just as OMR said his ain't close to even turn's out.
OK flame on.
Can someone answer this question please? The local bike repair shop owner stated that I needed to resolve the carb issues regarding not getting a cylinder firing and the air fuel mix. Only then would it be worth it to vac sync the carbs. Do I Need to vac sync or perfect the air/fuel first?? Or, do I run air/fuel, then vac sync, then confirm A/F???
Previously my 3rd cylinder was not firing, so I replaced the A/F needles on Keihin CV34 carbs. The 3rd cylinder required around 3-4 turns out to get the exhaust warm.
I just got the Gunson Colortune in the mail, and I am excited to use it.
BTW, here is the most recent manual: gunson.co.uk/items/pdf/Products/G4074-English.pdf
Questions: (pages will not
1) page 12 - Do I have the Variable Choke Carb or Slide Type Carb? Both sound applicable.
2) page 15 - Multible throttle body injection - help...
82 KZ1000-K2 LTD
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- Old Rider
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- Thank you received: 2
Old Dogs never Die.
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- FaultedGeologist
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- The truly educated never graduate...
- Posts: 130
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Old Rider wrote: To help with carb Sync I found a paper clip the size I needed to set the slide gap. I know some folks use wire and that works as well just figured I would pass along another item.
What is the slide gap?
Clint
1980 KZ750 LTD H4
FSMaunual: kz.bike-night.com/media/GPz750-full.pdf
Stock except for:
New chain and sprocket (530?).
Dynatek Ignition
Manual tensioner on the way.
Buy JIS screwdrivers.
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- JR
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FaultedGeologist wrote:
zukdave wrote: If the mech. sync is not done BEFORE any tuning you will not get the screw's any were near even
just as OMR said his ain't close to even turn's out.
OK flame on.
Can someone answer this question please? The local bike repair shop owner stated that I needed to resolve the carb issues regarding not getting a cylinder firing and the air fuel mix. Only then would it be worth it to vac sync the carbs. Do I Need to vac sync or perfect the air/fuel first?? Or, do I run air/fuel, then vac sync, then confirm A/F???
Previously my 3rd cylinder was not firing, so I replaced the A/F needles on Keihin CV34 carbs. The 3rd cylinder required around 3-4 turns out to get the exhaust warm.
I just got the Gunson Colortune in the mail, and I am excited to use it.
BTW, here is the most recent manual: gunson.co.uk/items/pdf/Products/G4074-English.pdf
Questions: (pages will not
1) page 12 - Do I have the Variable Choke Carb or Slide Type Carb? Both sound applicable.
2) page 15 - Multible throttle body injection - help...
I think you have Keihin CV 34 carbs in which case:
1 you don't have slide type carbs so can disregard the slide gap. Your choke lever operates a choke flap also called a butterfly which blocks air from the air box
2 you don't have fuel injection so no throttle bodies
1980 kz750E1, Delkevic exhaust
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- FaultedGeologist
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JR wrote: I think you have Keihin CV 34 carbs (YES) in which case:
1 you don't have slide type carbs so can disregard the slide gap. Your choke lever operates a choke flap also called a butterfly which blocks air from the air box
This makes sense now... slide=up and down, flap=rotation on center line.
So am I able to do one tune, then the other; or back and forth in search of unity? Any further confirmation of order or strategy would be great. Digging back in to the carbs and red wine...
Clint
1980 KZ750 LTD H4
FSMaunual: kz.bike-night.com/media/GPz750-full.pdf
Stock except for:
New chain and sprocket (530?).
Dynatek Ignition
Manual tensioner on the way.
Buy JIS screwdrivers.
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- JR
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- Thank you received: 449
1980 kz750E1, Delkevic exhaust
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- Old Rider
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I have seen folks make the homemade tuner out of 4 bottles, which i did as well after spending a small fortune in vacuum hose and making a mount for it all I can truely say for what it is it works but you cant fine tune with the 2cycle out I used, LOL! It sure does get a lot of looks hanging on the garage wall though. John.
Old Dogs never Die.
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- FaultedGeologist
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I did opinion research across the interwebs on them all, here is sum:Old Rider wrote: I been researching the Gunson the Motion pro sync and just a quad set of vacuum gauges. Im really thinking of just going old school with a set of vacuum gauges.
4x Vac gauges are old trusty, but require sync every use on a single vac source before use. Bulky, so storage and transport sucks.
$60 on Z1, or $200 for real nice set.
Motion Pro liquid sync set can get sucked into engine, and frequently gets air bubbles in it so one or more carbs cannot be set.
$90 at Z1, cheaper on Amazon.
Morgan Carbtune comes from UK or ebay for a premium. It uses stainless rods to show vac pressure, and is durable, portable, and needs no calibration.
$100 to $116 shipped depending...
I want the Morgan Carbtune and a set ov old gauges to test for myself the differences. Local shop uses classic gauges.
Clint
1980 KZ750 LTD H4
FSMaunual: kz.bike-night.com/media/GPz750-full.pdf
Stock except for:
New chain and sprocket (530?).
Dynatek Ignition
Manual tensioner on the way.
Buy JIS screwdrivers.
Please Log in or Create an account to join the conversation.
- Stazi
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- Posts: 115
- Thank you received: 11
82 KZ1000-K2 LTD
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