Hard Cold Starting with Carb Farts!

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jwood

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Sep 4, 2011
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I have been having a new issue that just started this riding season, when the bike is warm/hot no problems starting, when the bike is COLD from sitting a few hours to overnight, I put the choke on and my Odyssey battery turns the engine over at a great pace! the carbs (not sure which one(s) back fire (fart), let off the start button and do it again the bike starts right up; or it wont start and I get a LOUD BACK FIRE from the exhaust... I do smell gas when this occurs.. I believe the carbs are flooding, The next day I tried starting with the choke at about 25% open, no carb farts but the engine turned and turned for about 10 secs before firing up... Now today I tried starting it with no choke, the bike would not fire at all, I left the choke off and held the throttle open just a hair off idle, the bike started right up...

ANY IDEAS??? :bang head:
 
Pea shooter routine time? Probably have some junk in one or more idle circuits.

Easy to do. With airbox top removed, use N eye dropper to dribble seafoam down each of th paj inlets with the bike wrmed and running. Resync at the same time is a good idea too, if you have gauges.
 
Fresh plugs, gaped right, are never a waste of money. My bike does that with an excessive plug gap. I settled at .030 with COP coils.

That was going to be my first item to do.. I also run cops...

Sent by the Verizon 4G Data Network
 
That was going to be my first item to do.. I also run cops...

Sent by the Verizon 4G Data Network

Changed out the plugs, they look great! Burning nicely... Not rich, not lean, just right...

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Okay I found my problem, I went ahead and did a sync on the carburetors to make sure they were within spec, they were set perfectly, I went to put the small caps back on the sync ports and noticed two were cracked, I replaced them with new caps and the bike starts up just fine... so I am assuming that it was getting an air leak through the Sync Ports all working fine now!



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Yeah in that case you were starting lean and choke would correct it by introducing more fuel.
 

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