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Drag strip trip. 08 May 2012 22:20 #520845

  • zukdave
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So you're saying don't mill the head and wait till I do the 810
and let the bigger bore rise the compression ?

Another question you think going to a larger dia.
header tube will help or hurt the power ?
Nobody makes a sidewinder to fit so was thinking a KZ900-1000
pipe cut to fit as a step header set up.
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"...

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Drag strip trip. 08 May 2012 22:47 #520852

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Bigger bore in itself wont do much compression wise,but an 810 piston that matches the gpz combustion chamber would definately help.
Id try a Skinnier rear tire to flatten contact patch if it were me anyway B)
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Drag strip trip. 08 May 2012 22:51 #520853

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zukdave wrote: At about 20 lbs. there ain't much more to take out.
The 130 tire on the stock 2.15" rim's
sucked in and not using all the tread.


Calling Buchanan's spoke and rim in the morning
to see about a 3 1/2" maybe 4" black anodized alum.
rim and spoke set.
With the gpz swing arm and some offset sprockets
I can fit a five inch slick easily and 7" stuffed.

Is thew gpz 750 arm that much wider?
I dont remember the 81-82 arm with dual shocks being any wider than stock 900-1000 arm,a 3" rim and a 130 tire is usually about it in a stock 900/1000 arm anyway.
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Drag strip trip. 08 May 2012 23:50 #520880

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+1 - if so...maybe I need to look at swapping one of those arms over...

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Drag strip trip. 09 May 2012 08:35 #520931

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The arm is off an 83 unitrack.
Best pic I have right now but I'll get one today with a tape on it.
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"...

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Drag strip trip. 09 May 2012 14:14 #521010

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I'm running the GPZ swing arm like pictured. It' a bit longer too which helps keep the front wheel down. With the stock arm I'd do wheelies all the time and now it's real hard to do wheelies and when I do lift the front wheel it comes down quickly. It's funny years ago when I said my hot 650 went low 12's almost every one told me I was full of s#!t. I never tried a wheelie bar.

Mark
Jesus loves you Everyone else thinks your an ***

77 KZ650 C1 with ZX7 forks, GPZ mono rear, wider 18 police wheels and Yoshimura motor.

Yorba Linda Cal.

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Drag strip trip. 09 May 2012 19:23 #521066

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Mark Wing wrote: I'm running the GPZ swing arm like pictured. It' a bit longer too which helps keep the front wheel down. With the stock arm I'd do wheelies all the time and now it's real hard to do wheelies and when I do lift the front wheel it comes down quickly. It's funny years ago when I said my hot 650 went low 12's almost every one told me I was full of s#!t. I never tried a wheelie bar.

Mark

Its that good california air Mark! :laugh:
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Drag strip trip. 09 May 2012 21:27 #521092

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Mark the arms's 2 1/2" longer then stock.
I get the same chit from folk's thinkin I'm talkin trash
when I tell them my junk go's mid to low 12 second's.

F@$&em I got a time slip that told ME that's all that count's!!!!!!!!!!

Back to the arm here's some pic.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"...

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Drag strip trip. 10 May 2012 13:15 #521243

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Its that good California air Mark! :lol: :lol: :lol:

The 1000's I was spanking were running the same air. ;)


Dave I used the bearing sleeve from a GPZ 550 with my 650 pivot bolt and it all bolted together
Jesus loves you Everyone else thinks your an ***

77 KZ650 C1 with ZX7 forks, GPZ mono rear, wider 18 police wheels and Yoshimura motor.

Yorba Linda Cal.

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Drag strip trip. 10 May 2012 20:53 #521328

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Its been a while since Ive been to our local 1/8 mile since I sold my 1327,but from what i remember strapped down busas were running 6.70-6.90 range with a little motor tweaking and a pipe around here in the 1/8 around here anyway with decent riders. B)
best I ever got out of the 1327 was a string of 6.15-6.18s /115 and change with no bar and lots of traction issues B)
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Last edit: by wireman.

Drag strip trip. 10 May 2012 21:28 #521340

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Mark thank's for that info.
I was going to ream the frame hole
to fit the 750 bolt.

My sleave's are already trimed
to fit the frame but a 550 sleave
would be a better way to go.
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"...

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Drag strip trip. 10 May 2012 21:43 #521346

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wireman wrote: a string of 6.15-6.18s /115 and change with no bar and lots of traction issues B)


Best to date 1/8 mile was
7.81/88.08

I'll go set in the corner till
I get some big boy panty'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"...

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Drag strip trip. 10 May 2012 23:53 #521399

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You can get hurt just as bad at any speed going down the track.
Ive got a 20 year old daughter who could ride my 1327 just as hard as me on the street,ive ridden on the back of that bike with her piloting it on more than 1 occassion before I sold it. :sick:
Only thing Ive got to say is if she ever road that thing with a really sticky tire and a bar I wouldnt want to be in the other lane against my little version of vickie farr! :woohoo:
I really need to get my head out of my ass and build an old gasser out of one of my old 55 chevys or an old 50s chevy truck and stick her behind the wheel and me and the boys can turn the wrenches! B)
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Drag strip trip. 11 May 2012 00:16 #521408

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I wonder how cost affective it would be to set up some sort of progressive nitrous system on a smaller motor like that?
I bet you could use some of those individual nitrous plates/manifolds between head and boots like a 900/1000 since youre already using bigger boots for those 29s.
Then you could adjust it to come on as you get it rolling so it doesnt shock the suspension/chassis so hard B)
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Drag strip trip. 11 May 2012 00:42 #521419

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Been along time but we would have 2 and 3 stage systems on our dragsters. One set came on in first gear activated by throttle position. and a second stage in a higher gear set off with a manual button. Its great till you exceed the motors ability to contain the power , then we would have a spectacular blast of fire shoot out the sides of the cylinder head
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Drag strip trip. 11 May 2012 01:05 #521433

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Thats half the fun of racing,fixing/updating once you find the limitations of a design! :laugh:
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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Drag strip trip. 11 May 2012 08:30 #521494

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wireman wrote: Its been a while since Ive been to our local 1/8 mile since I sold my 1327,but from what i remember strapped down busas were running 6.70-6.90 range with a little motor tweaking and a pipe around here in the 1/8 around here anyway with decent riders. B)
best I ever got out of the 1327 was a string of 6.15-6.18s /115 and change with no bar and lots of traction issues B)


Those were some poor riders on those Busas... On the other hand, your old big block as working quite well for foot shifting and no bar ;)
Larry C.

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Drag strip trip. 11 May 2012 08:37 #521497

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zukdave wrote: So you're saying don't mill the head and wait till I do the 810
and let the bigger bore rise the compression ?

Another question you think going to a larger dia.
header tube will help or hurt the power ?
Nobody makes a sidewinder to fit so was thinking a KZ900-1000
pipe cut to fit as a step header set up.


I never like to see a head decked more than enough to make it straight. It's a cheap way to compression ratio increase with adverse affects for moving parts clearances.....

Now granted .020" isn't a huge amount and can be brought back with a base gasket pretty quickly. Trouble with that though is padded up cylinder blocks create potential for oil leaks.

Things just always go so much smoother when you use correct parts...

You might well find a hair increase in ET and MPH with the baffle plate removed. I'd lean more toward the MPH increase.

You might also pull the header off and make sure the crushed copper O ring hasn't smooshed [technical term] to the point where it's partially blocking the roof of the exhaust port. While it's off, decarbon the primaries.

Some sort of stack on the 29's would be worth the simple effort to install as well. Look for every possible way to reduce drive line friction...perfect wheel alignment, free running chain...etc. It gives you something to do during the week while your chomping at the bit for race day :)

Before you swap pipes, try pulling the rear section right off your pipe and make a couple of passes with just the header portion. Might require a jet change.
Larry C.
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Drag strip trip. 11 May 2012 12:07 #521538

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LarryC wrote:

wireman wrote: Its been a while since Ive been to our local 1/8 mile since I sold my 1327,but from what i remember strapped down busas were running 6.70-6.90 range with a little motor tweaking and a pipe around here in the 1/8 around here anyway with decent riders. B)
best I ever got out of the 1327 was a string of 6.15-6.18s /115 and change with no bar and lots of traction issues B)


Those were some poor riders on those Busas... On the other hand, your old big block as working quite well for foot shifting and no bar ;)

Nope its just piss poor air we have here on the corn coast! :woohoo:
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Drag strip trip. 11 May 2012 12:12 #521539

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All this racing talk has me thinking,I might have to go play spectator tomorrow night :woohoo:
posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.

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