Starter for high compression drag engine.

  • TerryK
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Starter for high compression drag engine.

22 May 2024 08:01
#899515
Looking to convert my KZ1000 (1200cc) drag engine to self start. It 16:1 compression so I’ll need to run 24v starting. Whats the recommended starter for this application? CBR900 has been suggested but what year? 
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header



1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc

Ontario, Canada

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  • zed1015
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Re: Starter for high compression drag engine.

22 May 2024 09:56 - 22 May 2024 09:57
#899524
TerryK wrote:
Looking to convert my KZ1000 (1200cc) drag engine to self start. It 16:1 compression so I’ll need to run 24v starting. Whats the recommended starter for this application? CBR900 has been suggested but what year? 
The Honda starter is 12v not 24v and so is any other onboard starter that fits these engines.
The later J/GPZ 4 brush starters are the strongest and the usual go to for higher comp motors.
Ricks Motorsport also does a new higher torque starter for the KZ which is on par with the J/GPZ item.
All of which are 12v.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
www.kzrider.com/23-for-sale/611992-air-c...lide-mikunis?start=0





Last edit: 22 May 2024 09:57 by zed1015.
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Re: Starter for high compression drag engine.

22 May 2024 10:48 - 22 May 2024 11:37
#899529
I believe the norm is to put 24v through a 12v starter which "gets the job done" but dramatically shortens the life of the starter motor This was common practice "back in the day" with rally cars that struggled to restart when hot (these days you can buy car starters with "torque reduction gears in the nose so they spin faster with less effort)
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
Last edit: 22 May 2024 11:37 by Wookie58.

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  • F64
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Re: Starter for high compression drag engine.

22 May 2024 13:44 - 22 May 2024 13:55
#899530
You may be able to help out the current starter by running a much larger power cable(like 2/0 or 70mm²) and shortening the length if possible.

Run the same size ground wire to the engine case.

Then get a battery that can supply more current at 12v than your current battery.
81-KZ440-D2.
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Last edit: 22 May 2024 13:55 by F64.

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Re: Starter for high compression drag engine.

23 May 2024 03:09 - 23 May 2024 03:20
#899560
zed1015: I know I have to run 24v, I just need to know the best starter to use and the honda starter has come up in conversation. Ill check with Ricks thanks! 
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header



1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc

Ontario, Canada
Last edit: 23 May 2024 03:20 by TerryK.

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Re: Starter for high compression drag engine.

23 May 2024 03:11
#899561
Yes 24v is what I need to run. Just looking for a starter that would handle it for a season or two.
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header



1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc

Ontario, Canada

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Re: Starter for high compression drag engine.

24 May 2024 07:03 - 24 May 2024 07:04
#899634
Starter - CB900-1100F 1980-83 marked "438" on the end, 0.8KW Mitsuba SM-220

These are the cores generally used to make a "Super" starter but they get rewound to handle the extra current. I believe the company that use to rewind them is no longer in business as the owner died.

The general practice is to light weight the stator end and run two batteries wired for 24V to start. The main battery to run coils/ignition is 10AH (usual min spec for MSD box) the secondary battery is 7AH wired to only run on the start button. Run them thru a Ford V8 starter solenoid.

Call Mike Law at RaceWorks Canada, he has built hundreds of these systems.

 
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
Last edit: 24 May 2024 07:04 by Injected. Reason: sp

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Re: Starter for high compression drag engine.

24 May 2024 16:45
#899666
What was the company called? wrote: Starter - CB900-1100F 1980-83 marked "438" on the end, 0.8KW Mitsuba SM-220

These are the cores generally used to make a "Super" starter but they get rewound to handle the extra current. I believe the company that use to rewind them is no longer in business as the owner died.

The general practice is to light weight the stator end and run two batteries wired for 24V to start. The main battery to run coils/ignition is 10AH (usual min spec for MSD box) the secondary battery is 7AH wired to only run on the start button. Run them thru a Ford V8 starter solenoid.

Call Mike Law at RaceWorks Canada, he has built hundreds of these systems.


 
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header



1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc

Ontario, Canada

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  • Injected
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Re: Starter for high compression drag engine.

24 May 2024 18:58
#899671
TerryK wrote:
What was the company called? wrote: Starter - CB900-1100F 1980-83 marked "438" on the end, 0.8KW Mitsuba SM-220

These are the cores generally used to make a "Super" starter but they get rewound to handle the extra current. I believe the company that use to rewind them is no longer in business as the owner died.

The general practice is to light weight the stator end and run two batteries wired for 24V to start. The main battery to run coils/ignition is 10AH (usual min spec for MSD box) the secondary battery is 7AH wired to only run on the start button. Run them thru a Ford V8 starter solenoid.

Call Mike Law at RaceWorks Canada, he has built hundreds of these systems.




 



Note - That info is 6 year old


 
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike

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