Drag strip trip.

zukdave
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Re: Drag strip trip.

26 Oct 2016 17:40

Pulled the leaking valve and did a quick lap and it looks like it's bent but there's no sign's of it hitting anything.
Piston dome does not have any kind of mark on it and the valve has no mark's.

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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SWest
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10 22 2014
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Re: Drag strip trip.

26 Oct 2016 18:14

#746288

Warped from overheating?
Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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zukdave
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Re: Drag strip trip.

27 Oct 2016 15:51

#746318

Steve I don't think so maybe if it was an exh. valve the intake valve's run a lot cooler.

Anyways dug out the spare head stole a valve out of it to use lapped it in the head I'm running
and got a perfect seal now to lap the rest and order a head and base gasket.

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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SWest
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10 22 2014
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Re: Drag strip trip.

27 Oct 2016 15:56

#746319

Yeah, you're running relatively mild cams, yes? Good to have spares.

I still have my old valves just in case. The Doremi vaves are lighter so I didn't know what to expect from them. So far so good. :whistle:
Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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zukdave
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Re: Drag strip trip.

28 Oct 2016 18:16

#746410

Steve the cams are stock ZX750A1 better known as the 83 GPz750 their the best factory cams for the small four's.

Head's all done ready to go, did a light hone on the cylinder's, Gasket's get here I'll but it back together
next week.
Gonna do a test fit and see if I can leave the base gasket out to bump the comp. a bit.
If the piston don't stick out the cylinder I'm good right

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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SWest
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10 22 2014
Posts: 23262
Thanks: 2840

Re: Drag strip trip.

28 Oct 2016 18:39

#746415

I thought you had a mild overbore or something being you're shifting so high. Without the base gasket you gain 2mm?
Maybe I shoulda done that.

Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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zukdave
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Re: Drag strip trip.

02 Nov 2016 17:11

#747013

Man I hate waiting on parts gasket's on their way and the rest is ready to go back together.

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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zukdave
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Re: Drag strip trip.

06 Nov 2016 06:05

#747403

Cylinder blocks on so this morning going to see if I can I can get the valves adjusted and the head on before the rain starts
this afternoon.

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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zukdave
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Re: Drag strip trip.

06 Nov 2016 12:33

#747422

One shim short of getting the valve's adjusted.
I've got about two dozen extra shim's and need one one size thinner then my thinnest for the intake valve I replaced.
Gointg to take the head to work tomorrow and pull the valve and tip the stem that'll put it in the range of shim's I have.

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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zukdave
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Posts: 1685
Thanks: 229

Re: Drag strip trip.

14 Nov 2016 15:13

#747975

Motor's back together and went for a test ride last night all seems good to go.
I did make some jetting changes and it didn't like the bigger pilots so I'll pull the carbs and put the pilots I had in it back in.

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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KZB2 650
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Re: Drag strip trip.

18 Nov 2016 14:14 - 18 Nov 2016 14:18

#748247

Did you go to 25 pilots and back to the 22.5s ? ....... If I dig my 29s out and fresh in them up I'm planning on trying 20s up from the 17.5s I've ran for years...... air screws out around 3/4 a turn sound about right to start with ?

Those piston skirts still look like new.... I've been imagining a lot of the little lines being worn away on mine while they break in but I guess and hope not.

1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.

Last edit: 18 Nov 2016 14:18 by KZB2 650.

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zukdave
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Re: Drag strip trip.

20 Nov 2016 10:18

#748419

Just got back from the track had a blast was a great event for a first time event.

Ended up with a new personal best time of 7.18 from a 7.34 best time.
I'm tried I'll get a full report later today.

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.

Please Log in or Create an account to join the conversation.