Pickup coil mod done, two thumbs up! (so far) - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 11 (permalink) Old 08-18-2011, 10:10 PM Thread Starter
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Smile Pickup coil mod done, two thumbs up! (so far)



Did the pickup coil mod today to help with the hot start problem. Both coils were greater than .80mm so I gave it a try. Washington state finally got some warm weather so the hot start issue was returning. For those of you who have not done it yet, I rate it as 'easy' to do.

Very little oil dripped out after removing the stator side cover (I use 4L of oil) no worries there. The screws holding the pickup coils were not as difficult as I was prepared for; they came off easily w/o the need for anything more than a cross head screwdriver.

Once off, I nipped off the nub on the stator side with crimping pliers. The nub came off easy then cleaned up the remainder with a small chisel.

To elongate the screw hole, I used a chain saw file as others have done. The metal is so soft, took me about a minute to do each hole - Would have taken me longer to find my Dremel with the correct size stone.

I adjusted the gap to .45mm, reassembled, and started up the bike. It fired right up. For the real test, I rode my son down to the local mini mart (5 miles) to get some well deserved chips and a coke. Lately, this stop would have warmed up the engine enough to cause a hot start issue but not today. The engine started right up again-smiles-

Returning home, bike fully warmed up, I shut it off, let it set for a few seconds (worse time to try to restart) then pushed the starter button anticipating a loud backfire. Again It started right up, almost as easy as my GL500 Honda - now I'm impressed.

This weekend will be in the 90's (hey, that's hot for here) and I plan on a long ride with my bro on his Triumph 900 perhaps around the Olympic Peninsula 300+ miles. I'll follow up with results.

THANK YOU ALL VN750 members who have done this mod with good results.

95 VN750 (eBay)31k+
GL1100 front fender
OEM engine guard
OEM high back rest
'V-Twin' HWY pegs
Black 750 Spectre handlebars
SunPro Volt Meter (Amazon)
Maier bug shield (JCW)
Bar Ends anti-vibe (JCW)
Emgo air filters
Tank bag-Eclipse
Tail bag-FroZone Cooler
Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6

Last edited by dirtrack650; 08-19-2011 at 12:33 AM.
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post #2 of 11 (permalink) Old 08-18-2011, 11:02 PM
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Glad you had great success with the mod. Sounds like you did it the same way I did. It truely is in my personnal top ten mods for the VN750.

~~C8> Ratt
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'91 VN750 - Cosmic Splendor/Candy Wine
Done: Coastered, .020 ign., Iridiums, VM
Plexistar II, MCCT's, Relocated MOSFET
Next: LED's
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post #3 of 11 (permalink) Old 08-19-2011, 12:53 PM
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post #4 of 11 (permalink) Old 08-19-2011, 08:46 PM
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Just did this mod an hour ago. She fired up quicker than normal. So far, so good.

1986 Black Kawasaki Vulcan VN750 "Black KAWK"
VN750 #9300 & VROC #33453

EMGO Handlebar, V&H Exhaust, Drop Shocks, Raised/Painted Fork, MeanStreak Seat, Tank Bib, ME880 Oversize Tires, Engine Guard, Custom Mirrors, Chris Products Turn Signals, Ear Shave, 150/42 Jets, PINGEL Fuel Valve, MCCT, Volt Meter, Shendegen R/R, AGM Battery, Coastered, .020 Coils, Relo Gauges & Headlamp, SilverStar Ultra, LED Flashing Brake Light, Center Stand Delete, WOLO Airhorn.
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post #5 of 11 (permalink) Old 08-19-2011, 09:55 PM Thread Starter
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Went out today, couldn't wait for the weekend. Did the St. Helen's ride with several stops to challenge the hot start issue in 80+ degree weather. Nice ride, 4,000 foot elevation climb in 37 miles so it does push our little bikes a bit.

I made 3 stops, each time resting not more than 10 minutes. The bike started easily every time. At the 4,000 foot stop, I had to push the starter twice, but that's far better than before the coil adjustment. The engine seemed to pull the hills better; I was able to make most of the trip in 5th gear w/o down shifting.

95 VN750 (eBay)31k+
GL1100 front fender
OEM engine guard
OEM high back rest
'V-Twin' HWY pegs
Black 750 Spectre handlebars
SunPro Volt Meter (Amazon)
Maier bug shield (JCW)
Bar Ends anti-vibe (JCW)
Emgo air filters
Tank bag-Eclipse
Tail bag-FroZone Cooler
Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6
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post #6 of 11 (permalink) Old 08-20-2011, 08:05 AM
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Quote:
Originally Posted by dirtrack650 View Post


Did the pickup coil mod today to help with the hot start problem

I adjusted the gap to .45mm,

Just curious. Why .45 gap ? Most of the coil mods were done at .18-.20 gap.

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
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post #7 of 11 (permalink) Old 08-20-2011, 09:30 AM Thread Starter
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.45mm not inches. My feeler gauge is metric so .45mm = 0.018"

Everyone should do this - I suspect the factory settings are to satisfy emissions, not performance.

95 VN750 (eBay)31k+
GL1100 front fender
OEM engine guard
OEM high back rest
'V-Twin' HWY pegs
Black 750 Spectre handlebars
SunPro Volt Meter (Amazon)
Maier bug shield (JCW)
Bar Ends anti-vibe (JCW)
Emgo air filters
Tank bag-Eclipse
Tail bag-FroZone Cooler
Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6
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post #8 of 11 (permalink) Old 08-20-2011, 09:52 AM
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Quote:
Originally Posted by dirtrack650 View Post
.45mm not inches. My feeler gauge is metric so .45mm = 0.018"

Everyone should do this - I suspect the factory settings are to satisfy emissions, not performance.
Should have noticed that. Thanks

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
JM2001 is offline  
post #9 of 11 (permalink) Old 08-22-2011, 07:05 PM
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What's the link to the pickup coil mod?
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post #10 of 11 (permalink) Old 08-23-2011, 08:39 AM
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Quote:
Originally Posted by lrayvick View Post
What's the link to the pickup coil mod?
here is one write up.
https://www.vn750.com/forum/showthrea...ck+up+coil+mod

Roach did a video of this while rebuilding his engine.
part 24
https://www.vn750.com/forum/showthrea...t=18289&page=8
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