VF1000F when hot problem

XFF · 06-19-2008, 09:52 PM

Hello,

Just purchased an 84 VF1000F project bike. Most of the problems are just cosmetic issues except the following:

The bike starts when it is cold and seems to run fine. Once it warms up it will not start if I shut it off or stall it out. After it cools again it will start...

Again, even after it is warm is seems to run fine... (yea, ALOT faster then my BMW... WOW!) As long as you don't shut it off or stall... it has to cool before starting again. FYI, The bike has a little over 50,000 miles on it.

Maybe someone out then can suggest where to start looking for this problem...

Thanks,

eddievalleytrailer · 06-19-2008, 10:03 PM

Sounds like you need to rebuild the starter. You should find the kit at your Honda Dealer.

XFF · 06-19-2008, 10:15 PM

Thanks for the quick reply!
The starter will crank the bike when it is warm... the bike won't start warm but will stay running if it is warm...

XFF

eddievalleytrailer · 06-20-2008, 06:32 AM

Yeah. When the starter gets weak, it pulls too much current from the battery, leaving little for the ignition to work with. It will crank over, but won't start. 1st Gen Honda V-4s are famous for this.

CARMINE · 06-20-2008, 06:34 AM

hi, sorry but.....
i do not agree. A starter runs or does not runs at all. I think that you have a problem to the gasoline line (fuel pump and/or carbs). Or it is a problem of overheating (cilinder/rings/gasket). Does the engine tend to boil coolant ? If so, check fan (thermoswitch) : which temp. ?....You can easily install a manual switch to run radiator fan before coolant to become too hot...
Lamps to all VFR Owners.

WhiteKnight · 06-20-2008, 09:12 AM

I was thinking valve adjustment on this one. I know on my 3rd gen, if I ran it hard, then stopped for a couple of minutes, when I tried to start the engine I would have to give it a little fuel, as well as for a few minutes after if I cranked on it, it would cut out like it was starved for fuel, but only at about 6000 RPM. After I had the valves checked (way out of adjustment but bike ran great otherwise) and had them adjusted, the problem went away. I might be off base here, but its just my $.02.

XFF · 06-20-2008, 06:23 PM

Hello everyone for are the great ideas!

I'm going to trinker with it this Sunday for a while and if I make any progress I post a reply.

Just discovered a new problem and that is once again when it is all warmed up the clutch slips... I going to did into the service manual for some of this stuff...

Thanks,

JamieDaugherty · 06-21-2008, 08:59 AM

As noted it's not the starter but rather it's in the carbs. I usually notice this when the carbs need to be rebuilt. I'd give that a shot first, they probably need it anyway.

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06-19-2008, 09:52 PM	#1 (permalink)
XFF Junior Member Join Date: Jun 2008 Last Online: 06-20-2008 06:27 PM Posts: 4 Thanks: 4 Thanked 0 Times in 0 Posts	VF1000F when hot problem Hello, Just purchased an 84 VF1000F project bike. Most of the problems are just cosmetic issues except the following: The bike starts when it is cold and seems to run fine. Once it warms up it will not start if I shut it off or stall it out. After it cools again it will start... Again, even after it is warm is seems to run fine... (yea, ALOT faster then my BMW... WOW!) As long as you don't shut it off or stall... it has to cool before starting again. FYI, The bike has a little over 50,000 miles on it. Maybe someone out then can suggest where to start looking for this problem... Thanks,

06-19-2008, 10:03 PM	#2 (permalink)
eddievalleytrailer Uber Guru Join Date: May 2007 Last Online: Today 06:57 AM Location: Jonesborough, TN - Find Me! My Ride: 82 V-45 Sabre 83 VF750F Interceptor 91 XR250L 03 Shadow ACE 07 RWB Interceptor View my Photo Gallery Posts: 1,286 Thanks: 52 Thanked 52 Times in 33 Posts	Sounds like you need to rebuild the starter. You should find the kit at your Honda Dealer. __________________ Proud Member Sixth Gen Militia-1st VTEC Battalion

06-20-2008, 06:32 AM	#4 (permalink)
eddievalleytrailer Uber Guru Join Date: May 2007 Last Online: Today 06:57 AM Location: Jonesborough, TN - Find Me! My Ride: 82 V-45 Sabre 83 VF750F Interceptor 91 XR250L 03 Shadow ACE 07 RWB Interceptor View my Photo Gallery Posts: 1,286 Thanks: 52 Thanked 52 Times in 33 Posts	Yeah. When the starter gets weak, it pulls too much current from the battery, leaving little for the ignition to work with. It will crank over, but won't start. 1st Gen Honda V-4s are famous for this. __________________ Proud Member Sixth Gen Militia-1st VTEC Battalion

06-20-2008, 06:34 AM	#5 (permalink)
CARMINE Senior Member Join Date: Apr 2007 Last Online: Today 09:14 AM Location: (NAPLES) ITALY My Ride: VFR 750 1987 View my Photo Gallery Posts: 188 Thanks: 0 Thanked 9 Times in 9 Posts	hi, sorry but..... i do not agree. A starter runs or does not runs at all. I think that you have a problem to the gasoline line (fuel pump and/or carbs). Or it is a problem of overheating (cilinder/rings/gasket). Does the engine tend to boil coolant ? If so, check fan (thermoswitch) : which temp. ?....You can easily install a manual switch to run radiator fan before coolant to become too hot... Lamps to all VFR Owners. __________________ http:/vfrworld.com/photos/data/574vfr_world_1stDivision_logo.gif

06-19-2008, 10:15 PM	#3 (permalink)
XFF Junior Member Join Date: Jun 2008 Last Online: 06-20-2008 06:27 PM Posts: 4 Thanks: 4 Thanked 0 Times in 0 Posts	Thanks for the quick reply! The starter will crank the bike when it is warm... the bike won't start warm but will stay running if it is warm... XFF

06-20-2008, 09:12 AM	#6 (permalink)
WhiteKnight Moderator Join Date: May 2006 Last Online: 01-02-2009 11:52 PM Location: South Central Ky - Find Me! View my Photo Gallery Posts: 2,340 Thanks: 5 Thanked 19 Times in 19 Posts	I was thinking valve adjustment on this one. I know on my 3rd gen, if I ran it hard, then stopped for a couple of minutes, when I tried to start the engine I would have to give it a little fuel, as well as for a few minutes after if I cranked on it, it would cut out like it was starved for fuel, but only at about 6000 RPM. After I had the valves checked (way out of adjustment but bike ran great otherwise) and had them adjusted, the problem went away. I might be off base here, but its just my $.02. __________________ http://www.nrwhiteknight.net

06-20-2008, 06:23 PM	#7 (permalink)
XFF Junior Member Join Date: Jun 2008 Last Online: 06-20-2008 06:27 PM Posts: 4 Thanks: 4 Thanked 0 Times in 0 Posts	VF1000F not Starting when hot problem... Hello everyone for are the great ideas! I'm going to trinker with it this Sunday for a while and if I make any progress I post a reply. Just discovered a new problem and that is once again when it is all warmed up the clutch slips... I going to did into the service manual for some of this stuff... Thanks,

06-21-2008, 08:59 AM	#8 (permalink)
JamieDaugherty Senior Member Join Date: Aug 2006 Last Online: Today 07:11 PM Location: Fort Wayne, IN - Find Me! My Ride: 1998 VTR1000F 1995 YZ125 1984 VF500F (4) 1984 VF1000F (3) 1984 VF700F (5) Posts: 558 Thanks: 4 Thanked 19 Times in 19 Posts	As noted it's not the starter but rather it's in the carbs. I usually notice this when the carbs need to be rebuilt. I'd give that a shot first, they probably need it anyway. __________________ Jamie Daugherty jamie@daughertymotorsports.com www.daughertymotorsports.com

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