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post #1 of 8 (permalink) Old 07-09-2007, 10:43 AM Thread Starter
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Hard start when hot

My girlfriends 2002 750 has a hard time starting when hot. If you shut it off and go to start it within 20 min it needs choke to start. I have not started on the mods to the mixture, carb sync, relay for the coils or vent hose yet, but I will soon. I ask because I have not yet seen this problem described on the board, and want to be heading in the right direction when I start. Will removing and cleaning -adjusting the carbs likely be the fix?
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post #2 of 8 (permalink) Old 07-09-2007, 11:10 AM
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You probably have a wet cell battery on the bike. You'll want to remove that and get a Maintenance Free sealed battery first off. That's probably the biggest problem with the hot starting issue. On mine, (same year) it had a MF battery when I bought it, but still had the hot start problem. I relocated my regulator/rectifier to the side next to the left passenger foot peg and the hot start problem went away. I think the heat from the pre-muffler really does a cook job on the regulator, and getting it out from under the battery box, where it's right above the pre-muffler, really helps keep it cooler.

Some have solved the hot start problem with an MF battery alone, where I had to move the regulator to fix it.

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Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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post #3 of 8 (permalink) Old 07-10-2007, 07:43 AM Thread Starter
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Thanks. When she lets me work on the bike that and the coil relay will be the first things I do!
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post #4 of 8 (permalink) Old 07-10-2007, 10:22 AM
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You probably read one of my posts or my writeup about the coil mod. Honestly, I wish I'd done the r/r relocate and the coil mod at different times so I'd know which one actually fixed the hot start problem, but since our bikes are 2002's, I'd imagine it was the r/r relocate that had most to do with it, since our wiring shouldn't be suspect quite yet on a bike that new, but you never know!

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Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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post #5 of 8 (permalink) Old 07-10-2007, 11:36 AM Thread Starter
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I'll do the coil relay mod first then after testing I'll do the r/r mod, and let ya know! That's whats so fun about these forums. Learn learn learn!
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post #6 of 8 (permalink) Old 07-10-2007, 11:46 AM
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Excellent!

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
SEAFOAM JUNKIE!


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post #7 of 8 (permalink) Old 08-05-2007, 11:47 AM Thread Starter
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I lied! I did the r/r first. It's all good though cause now it starts perfect when hot! I'm still going to do the coil mod, but I think getting the regulator to a cooler place is the fix.
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post #8 of 8 (permalink) Old 08-05-2007, 12:57 PM
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I'll second that last idea.

Relocating the r/r (before doing anything else, except of course for the m/f battery) pretty much killed off my hot start problem, as well.....

'05 VN750



For other bike pix & mods, go to:
http://s1203.photobucket.com/albums/...k/VN750%20pix/
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