what is resistance of COP you installed? What is V-max specs resistanse?

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DreamV4

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I checked 2 my OEM coils: 3 Ohm and 150 Ohm.
It looks like 3 Ohm is right resistanse of good coil.
what is OEM specs and what is your COP resistanse?
 

MaxMidnight

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Not sure who or where the following was posted but it should get you started. There may be more recent C.o.p's that would also be suitable.

Here is a list of the COPs that will work on our Bike:
Denso JO440 (129700-4400) 1.5 Ohms
Suzuki Part number 33410-35F10/35F00 (Denso p/n 129700-4400) fits the following models:
Suzuki GSXR: 1000 (01-07), 750 (01-05), 600 (01-03)
Suzuki GSX-R600 2001 (K1)
Suzuki GSX-R600 2002 (K2)
Suzuki GSX-R600 2003 (K3)
Suzuki GSX-R600Z 2003 (K3)
Suzuki GSX-R750 2001 (K1)
Suzuki GSX-R750 2002 (K2)
Suzuki GSX-R750 2003 (K3)
Suzuki GSX-R750 2004 (K4)
Suzuki GSX-R750 2005 (K5)
Suzuki GSX-R750 2000 (Y)
Suzuki GSX-R1000 2001 (K1)
Suzuki GSX-R1000 2002 (K2)
Suzuki GSX-R1000 2003 (K3)
Suzuki GSX-R1000 2004 (K4)
Suzuki GSX-R1000Z 2004 (K4)

Suzuki GSXR: 1000 (01-07), 750 (01-05), 600 (01-03) OEM p/n 33410-35F10/35F00

(Denso p/n 129700-4400 or 4150) 4400/1.5 ohms, 4150/1.3 ohms V-boost cuts in later(?)

Kawasaki: ZX10/14 (04-07) OEM p/n 21171-0005 - 1.5 ohms
ZX9 (99-03) + ZX12 (03-05) OEM p/n 21171-1265/1286 (Denso p/n 129700-3630)
Z1000 (03-07) + Z750 (05-06) OEM p/n 21171-1286
Z1000 Denso p/n 129700-4580 - 1.5 ohms
ZX6 OEM p/n 21171-1282, Mitsubishi# F6T560
ZX9 Denso p/n 129700-3630 - 1.3 ohms
ZX10 Mitsubishi# F6T549/560
ZG14/08(Concours) # F6T560

Honda CBR600RR Ignition Coils 03-11 Denso 129700-4510 - 1.4 Ohm) V-boost works normally



Longer 5-1/2" Coil, are a tight fit but will work)
129700-4800 1.6 Ohms
Suzuki GSXR 600 750 (06 & 07)

CBR929 (all years)
CBR954 (all years)
CBR F4/ F4i
CBR1000RR (04-08)
ZX6 98-02

Note: With the lower resistance coils (less than 1.5 Ohm) it may be necessary to add load resistors to get close to the stock 3 ohm resistance.
1.5 ohm (or whatever resistance is need to get you to 3.0 ohms total) 25 watt resistors like these should work well:
13600-13
(1st column, 4th row.. 1.5 ohm 25 watt wire-wound, 5 pack)
As long as they're ~1.5 ohm wire-wound and between 20W and 30W they should work.

Note: Gapping on the Stock NGK Spark Plugs when using these COPs should be .026, instead of the .032-.035 used with the stock Coils.

PS
Most guys that used the Mitsubishi coils have said that they fail more often than the Denso coils.
 

Zenuwlijer

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Note: Gapping on the Stock NGK Spark Plugs when using these COPs should be .026, instead of the .032-.035 used with the stock Coils.

Hmmm... Seems that I overlooked that part when I installed the COPs a view years ago.

Question:

What does the narrowing in the gap do? Better spark / burning of the fuel?
 

02GF74

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Denso 129700-4800
Primary resistance 1.1 ohm
Secondary resistance 13 k ohm
 

Traumahawk

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Hmmm... Seems that I overlooked that part when I installed the COPs a view years ago.

Question:

What does the narrowing in the gap do? Better spark / burning of the fuel?

Stock COPS are not as "powerful" as stock coils (if the coils are in good shape....etc). COPS are designed to run on Fuel injected bikes, put require less energy to fire. If memory serves COPS are rated at 26K volts, and stock coils are 35K.
 

Vinmax

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Just an FYI article about Cops;


I have them on my bike. Been about 25,000 miles with them I believe. I'm using the Denso's as the Mitsubishi's failed way back when, so I changed over to Denso's from a GSXR (got them used on eBay).

My bike still starts like it's fuel injected and runs flawlessly. No resistors used. This is on a 2001.
Vinnie
 

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