Carb Jetting

Please take a look at the pipes as they were on this bike before we started work on it and the after pic, look at how the pipes that were on it to begin with are not dark Blue and the Mac 4 n 2 we put on it are dark Blue. Bike runs OK but am thinking that carbs may need to be richened up a little.
Yeah BTW, that really is the same bike.
Thoughts on the jetting anyone?
ED

ed spangler wrote: Please take a look at the pipes as they were on this bike before we started work on it and the after pic, look at how the pipes that were on it to begin with are not dark Blue and the Mac 4 n 2 we put on it are dark Blue. Bike runs OK but am thinking that carbs may need to be richened up a little.
Yeah BTW, that really is the same bike.
Thoughts on the jetting anyone?
ED

Should be rightfully proud of the beautiful, quality restoration.

Perhaps the former header pipes were stock double-walled which aren't as prone to coloring.

Before addressing the carbs, should assure valve clearances are within specs, and ignition timing is correct, and replace spark plugs with brand new NGKB8ES.

Would return carbs to stock settings, and proceed with tuning from there, beginning with sync and pilot air screw adjustments.

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Info from Z1E:

28mm (VM28SC) Late Z1-A & all Z1-B
Main Jet 112.5
Air Jet 1.0
Needle Jet O-8
Jet Needle 5J9-2 (last number is the clip position)
Throttle valve (slide) 1.5mm cutaway
Pilot Jet 17.5
Air Screw setting 1 1/4 turns out

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Good Fortune!

Patton wrote:

ed spangler wrote: Please take a look at the pipes as they were on this bike before we started work on it and the after pic, look at how the pipes that were on it to begin with are not dark Blue and the Mac 4 n 2 we put on it are dark Blue. Bike runs OK but am thinking that carbs may need to be richened up a little.
Yeah BTW, that really is the same bike.
Thoughts on the jetting anyone?
ED

Should be rightfully proud of the beautiful, quality restoration.

Perhaps the former header pipes were stock double-walled which aren't as prone to coloring.

Before addressing the carbs, should assure valve clearances are within specs, and ignition timing is correct, and replace spark plugs with brand new NGKB8ES.

Would return carbs to stock settings, and proceed with tuning from there, beginning with sync and pilot air screw adjustments.

---

Info from Z1E:

28mm (VM28SC) Late Z1-A & all Z1-B
Main Jet 112.5
Air Jet 1.0
Needle Jet O-8
Jet Needle 5J9-2 (last number is the clip position)
Throttle valve (slide) 1.5mm cutaway
Pilot Jet 17.5
Air Screw setting 1 1/4 turns out

---

Good Fortune!

Patton,

Do you have a link to Z1E with this information? I can't seem to find it on the site.

Never mind.. got it..

For others that might need a hand toward finding the excellent carb info furnished by Z1 Enterprises:







Good Fortune!