turns over slow and wont start when warm

CBR Forum Classifieds News Photo Gallery Search Member List Timeslips Contact Sponsors Register Login

turns over slow and wont start when warm

Printable Version

CBR Forum >> Past CBR Models >> CBR 1000F "Hurricane" >> turns over slow and wont start when warm

Page: [1]

Message

<< Older Topic Newer Topic >>

turns over slow and wont start when warm - 8/25/2008 8:45:00 AM

wentsCBR

Posts: 5
Joined: 8/24/2008
Status: offline

My cbr starts great when cold, and goes great too. But after a short ride it just dont want to start!
Anyone got any ideas?

< Message edited by wentsCBR -- 8/25/2008 8:49:57 AM >

Post #: 1

RE: turns over slow and wont start when warm - 8/25/2008 8:56:04 AM

Bassman

Posts: 72
Joined: 7/6/2006
From: Hamden, CT USA
Status: offline

How old is your battery. Are the Cables tight on the battery? Are the a little lose when they warm up?

_____________________________

Bassman
''93 CBR 1000F
''89 GB 500
''83 XR 350R
''76 CB 400F

(in reply to wentsCBR)

Post #: 2

RE: turns over slow and wont start when warm - 8/25/2008 9:06:15 AM

wentsCBR

Posts: 5
Joined: 8/24/2008
Status: offline

I tryed a new battery and it still did the same, cables are tight.

(in reply to Bassman)

Post #: 3

RE: turns over slow and wont start when warm - 8/25/2008 9:09:12 AM

collector

Posts: 469
Joined: 9/7/2006
From: Norwich UK
Status: offline

When you have been for a ride, take the plugs out (whilst hot) and check the gap as sometimes they can expand and when you try to restart, it the spark is not as intensive as it should be. As for the slow starting, could be battery, or bad earth or down to the starting problem your having. Try the plugs first and then see what happens. Good luck

Thumbnail Image

Attachment (1)

_____________________________

THE LITTLE VOICE IN THE BACK OF MY HEAD IS GONNA GET ME HURT

(in reply to wentsCBR)

Post #: 4

RE: turns over slow and wont start when warm - 8/25/2008 9:15:44 AM

wentsCBR

Posts: 5
Joined: 8/24/2008
Status: offline

Just left it for half an hour, its started on the button! what could it be?

(in reply to wentsCBR)

Post #: 5

RE: turns over slow and wont start when warm - 8/25/2008 9:31:13 AM

tobiahr

Posts: 61
Joined: 8/6/2008
From: Austin, TX
Status: offline

It could be a short or open overamping the wiring while the key is on. This will cause the cables to heat up and conduct less electricity. I''ve had this happen on my old Interceptor (electric cooling fan was drawing to high amperage) and a pickup I owned (starter cables to close to exhaust). A real pain to trace. You have to disconnect all normal power draws like the headlights and then check for current draw. Good news is you can check while the bike is cold.

(in reply to wentsCBR)

Post #: 6

RE: turns over slow and wont start when warm - 8/25/2008 11:20:39 AM

TimBucTwo

Posts: 608
Joined: 6/13/2006
From: Upstate NY, USA
Status: offline

Sometimes when the valves are to tight in an engine it will start when cold. When the engine warms up it will run great as the momentum of the valve will seat it. When it is warm the clearance may be to tight to get a good seal for starting. As the engine cools off the valve contracts and closes for starting. I incountered this with a few older cars with manual adjustment valve clearance. If it were me the first thing I would check is the valve clearance.

(in reply to wentsCBR)

Post #: 7

RE: turns over slow and wont start when warm - 8/25/2008 11:47:57 AM

bigape

Posts: 55
Joined: 3/30/2008
From: Cary, NC, USA
Status: offline

How do you know it isn''t fuel starved? Try replacing the vacuum line to the petcock and the main fuel line. No need spend a fortune on OEM parts. You can get bulk 3/8" fuel line and vacuum line at the autoparts store.

(in reply to TimBucTwo)

Post #: 8

RE: turns over slow and wont start when warm - 8/25/2008 4:05:23 PM

Trips

Posts: 801
Joined: 3/31/2005
From: Perth (Western Australia)
Status: offline

It also could be the dreaded starter clutch + alternator dampener combo :(

_____________________________

Remember the light at the end of the tunnel may be an oncoming train!