TOPIC:

Dr Gamma, PHENOMENAL bike!!! Dang it looks good!

Here is a short summary of whats all been done in the building of my Kz1000 Superbike road racer.

All major frame modifications done by Rob North and Pierre DesRoche back in 1979. This chassis is basically a copy of the bike that Reg Pridmore won the 1977 and 1978 AMA Superbike Championship on. Chuck Parme used basically the same bike to finish the highest placed privateer in the 1980 AMA Superbike Championship.

An oversize steering neck with TZ750 roller bearings is used, and has been relocated to put the front and rear wheels in alignment. Neck has also been repositioned rearward to put more weight on the front wheel, and it has about 2 more degrees of fork angle. KZ650 triple trees that have less trail are used to quicken up the steering. Double fork tube clamp bolts have been added to lower tree to increase fork rigidity.

Swing arm has been modified by DesRoche by cutting open, and welding in some internal bracing. An extra tubular 4130 moly hoop has also been added to bottom of swing arm. An oversize swing arm pivit bolt with matching swing arm inner sleeve are used, and mated to a honed to size mounting bosses on frame.

Frame has extra tubular bracing added through out the whole frame. This triangular bracing along with the DesRoche aluminum motor mount plates with ream-fit oversize bolts ties the motor to the frame making it one strong non-flexing structure. All worthless brackets, and tabs have been removed from frame for extra weight savings.

Yoshimura/Kayaba road race forks are used along with a 2.50X19 inch magnesium Morris mag. Brakes are 13 inch Kosman full-floating rotors with a pair of reworked Lockheed dual piston calipers mated to a KZ1000S1 master cylinder with a 11/16 piston. Earl's Supply -3 braided steel lines tie the whole brake system together.

Rear rim is a 3.50X18 inch magnesium Morris mag. Along with a Hunt plasma-coated aluminum brake rotor, and a KZ1000A brake caliper.

Light weight rearsets are fabricated using KZ1000S1 components. Mark II fuel tank has been reworked to use dual Z1R petcocks. This setup will allow the very last ounce of fuel to be picked up from tank!!! Custom fabricated gauge bracket with a rare KZ1000S1 road race tach. Vintage Yoshimura 1/8 turn Superbike throttle is used to open up the Keihin CR33 carbs. Custom fabricated Bassani Superbike pipe for the ultimate in cornering clearance is used.

Bike can be made street-legal with very little effort. All the provisions are there to add lights and charging system for street use. A under 440 pound street-legal KZ1000 makes a pretty nice street bike!!!

Current motor in bike;
KZ900 cases and covers are used for their lighter weight over similar KZ1000 parts.
KZ1000 cylinder block and head are used for this motor.
Lighten and polished KZ900 Falicon Supercrank with polished stock rods.
Moriwaki Engineering 73mm two ring cast pistons.
Cylinder head work by Yoshimura R&D with 37.5mm intake valves.
Yoshimura Super Bonneville cams running on Yoshumura KZ650 style shim buckets with lighten Yoshimura valve spring retainers.
Lighten and balanced Falicon clutch basket with O.E.M. clutch plates, H/D springs, and a needle bearing clutch pusher.
Transmission is a factory Kawasaki close ratio road race item. It comes from the factory fully undercut.
Andrews Products kickstart gear is fitted so the stock kickstarter can still be used with the close ratio box.
Motor has no provisions for electric start. Even the starter motor mounts have been removed for weight savings!!!
Stock diameter M.T.C. H/D Golden Studs are used so not to impede oil flow to the head.
Modified oil pump to eliminate any chance of oil aeration.
Earl's Supply 10 row oil cooler and plumbed with Earl's Supply AN8 braided steel lines and fittings.
Keihin CR33 carbs with the AMA mandated 31mm restrictors still installed are used.
Kal Gaurd Gun Kote coating has been applied to the complete motor, and covers to aid in the reduction of engine temperature.

love this bike! a true survivor!!
thanks for posting,

leon

Wow! this bike deserves to be nominated for bike of the month/year.

mopguy wrote: Wow! this bike deserves to be nominated for bike of the month/year.

Hmmmmmmmmmmmmmmmmm

Ya think

CR's

+1

mtbspeedfreak wrote: Dr Gamma, PHENOMENAL bike!!! Dang it looks good!

Super...

Well done.
Looks great!

I was looking around on the net, and I ran across a photo of Wes Cooley's 1979 Yoshimura GS1000S Superbike. Looks like Yoshimura has been using basically the same type of hand carved 1/4 turn throttle long before the GSXR750 Superbike program like I was told.

So that almost makes my throttle period correct for my Superbike. Now that its down in the 20's here at night in the mountains of Arizona. Its time to send my throttle to my machinist buddy, and get rid of that gap between the two halves of the throttle.

You went to a lot of trouble getting the weight down did you weight it ? if so what does it weight? wet/ dry.
Really curious because most of the gain is from trimming the weight (which I'm sure you have)

Dr. Gamma wrote: I was looking around on the net, and I ran across a photo of Wes Cooley's 1979 Yoshimura GS1000S Superbike. Looks like Yoshimura has been using basically the same type of hand carved 1/4 turn throttle long before the GSXR750 Superbike program like I was told.

So that almost makes my throttle period correct for my Superbike. Now that its down in the 20's here at night in the mountains of Arizona. Its time to send my throttle to my machinist buddy, and get rid of that gap between the two halves of the throttle.

I should have the article of John Ulrich on the 79' GS1000 superbike in Cycle world in my paper collection somewhere, if i find it will check if it had it back then indeed....