poor cranking - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 02-07-2011, 02:47 PM Thread Starter
Mississippi Rider
 
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poor cranking

My bike is very hard to crank unless it has been ran for a while. Once it has been cranked and ran for five minutes it will fire right up all day long. but that first time is very difficult and often will almost drain the battery before it cranks. my plugs look good and they are firing...plug wires look good but neither are new. starter isnt draggin or anything.

any tips on what I can do?

Does the timing slip on this bikes very often?
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post #2 of 8 (permalink) Old 02-07-2011, 03:39 PM
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Do you have iridium plugs and an AGM battery? Both do wonders for hot and cold starting problems.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #3 of 8 (permalink) Old 02-08-2011, 09:51 AM
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Sounds like the Battery has a weak cell or if it's not a AGM it could be low fluid level. Top it off and give it a charge it it's not an AGM and see what happens. If it's still hard to crank it might be time for a new battery.
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post #4 of 8 (permalink) Old 02-08-2011, 03:23 PM
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Try jumping it with a car battery. Either remove it from the car or make sure the car is off....

If it starts right away with the car battery, then it's safe to assume that all it needs is more juice.

The AGM battery and Iridium spark plugs do make a huge difference!
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post #5 of 8 (permalink) Old 02-09-2011, 12:28 PM
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Last edited by FlacoLove; 03-25-2013 at 11:25 PM.
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post #6 of 8 (permalink) Old 03-01-2011, 12:57 PM Thread Starter
Mississippi Rider
 
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It already has a new battery that i bought back in Dec. and it holds a strong charge, but I havent replaced the plugs in a while. So where can I get these Iridium plugs?
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post #7 of 8 (permalink) Old 03-01-2011, 01:27 PM
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Several auto parts places sell or can order them: O'Rileys, Autozone, etc.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #8 of 8 (permalink) Old 03-01-2011, 02:25 PM
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You want NGK brand plugs, part number DPR7EIX-9.

Is your new battery a maintenance free-AGM, or does it have 6 caps on it to add distilled water?
If it does have the caps, make sure to keep the electrolyte level topped up with distilled water.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html
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