at whit’s end, NEED HELP!

[judoman69]

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I have a 2004 Xb12R Firebolt. I just bought it and of last season and have only rode it for a few months if that even. Fortunately I have another bike so I’m still riding but I am overly frustrated with this Buell.
Almost immediately after I bought the bike put a new Drummer Exhaust and EBR race ECU. The bike was running like **** with the race ECU because I was unable to do a TPS reset. I put the factory ECU and bypassed the exhaust baffle. The bike ran a while like that and I finally did a TPS reset with a DCI and run the bike a while with no issues other then what seemed like a weak battery.
I replaced the Drag Battery with a Yusa and it seemed to fix the issue for a week until the bike started doing the same thing all over again.
It would be hard to start and would take a few sec to finally crank over if it would at all. On more than on occasion I would get home or to work and bike would be running but would not crank over 5 sec after being turned off.
So here are the tests that were done.
Cranking the motor over draws then battery down to well under 9 volts, the bike runs but does not charge the battery back up till a 12 v source is added then the voltage regulator kicks in and charges then battery at 13.45 volts. This bike will crank my other bikes battery down to under 9 volts and even my car battery.
So I replaced the starter.
No change, still cranks batteries down to under 9 volts.
Here is where then frustration really sets in.
Boosted with my can while running the bike will crank and run, but I runs like crap. It sounds like It wants to stall. I have done numerous TPS resets with no avail.
Pulled then plugs and they have white and red residue on them showing then bike is running rich, no surprise there.
Bike seems to crank over super easy with the plugs out.
I have not done a compression test as of yet that then next. Compression should be 120 PSI
I have not put a torch wrench on the crank yet. I don’t know what value to look for there?

********short of an intermittent regulator i sure my electrical is solid, i need to figure out why the starter is drawing the batter down so low and why its running like crap once it does start?**********

I NEED YOUR INPUT!

 

[nicholas900]

You could have a few different problems going on at the same time, which makes diagnosis difficult. I would tackle the charging issue first, then if the run ability issue persists go down that road.

The charging system is very basic, and simple. First and foremost I would be critical of grounds. The starter needs an equal ground just as it needs a heavy positive cable.

A good test to see if your grounds are bad is to connect a test wire to your NEGITIVE battery terminal. 10 gauge or so. Then while attempting to start the bike, touch the other end of the test wire to an unpainted surface on your engine. The small brass bolts on the back of the starter, or the studs for the idler should work.

If you get sparks between your grounded wire, and the engine which should be grounded... that would tell you there is a disconnect somewhere.

Just a thought.

 

[judoman69]

thanks to everyone who had suggestions and advise.
i have finally fixed the issue and the bike is running well.

 

[konarider94]

what was the issue?

 

[judoman69]

the timing was bang on.
what had caused the bike to hit a wall was the throttle body air funnel was not installed all the day down and was contacting the top of the air box and stopping air flow. TOTALLY MY BAD LOL

 

[konarider94]

Thanks for the update. [up]. That could definitely cause a problem.