I know what youre talking about as far as being seated right.

It idles fine and runs ok at low RPMs, but if you open the throttle it bogs downstalls out and constantly backfires.

Ive cleaned it, soaked it, cleaned all jets with wire and carb cleaner, replaced all the spark plugs, searched for vacuum leaks.

Could it be electrical Anyway, Ive posted a video of the symptoms below.

Id welcome any and all advice.

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Its sucking too much air and there is a lack of a vacuum being created.

I will say it was acting this way before I removed the air cleaner, but Ive done a lot of work on it since then.

Thanks 2 Share Report Save Continue this thread level 2 2003 Harley Sportster 883, 2001 Honda Shadow Spirit VT750DC Original Poster 3 years ago Hey man.

Thanks for all your help.

Share Report Save Continue this thread level 1 2003 Harley Sportster 883, 2001 Honda Shadow Spirit VT750DC Original Poster 4 years ago Just put it on a charger to verify its not a batteryalternator issue.

Vt750 Air Fuel Mix Screw Full Blast 3

Still acts the same while on a battery chargeron full blast 3 Share Report Save level 2 Yamaha 89 Radian YX600 94 RX100 4 years ago This.

Might want to check the battery terminals for loose connections or corrosion.

Sometimes the simplest things caused the most confusing issues.

Share Report Save level 1 You cant handle the truth 4 years ago Open the idle mixture screws about half a turn and try again.

Let us know what happens.

Share Report Save level 2 2003 Harley Sportster 883, 2001 Honda Shadow Spirit VT750DC Original Poster 4 years ago Ive opened them up a whole nother turn, and even tried closing them a bit.

It doesnt help, unfortunately.

Share Report Save level 1 4 years ago Are the jets all stock sizes Clean air filter 2 Share Report Save level 2 2003 Harley Sportster 883, 2001 Honda Shadow Spirit VT750DC Original Poster 4 years ago Jets are all stock.

As a fellow redditer pointed out, I have the air filter off completely in that video.

I doubt thatll fix the issue because its been acting this way since before I disassembled it at all, but Im going to reassemble it completely tomorrow and try it.

Share Report Save level 1 4 years ago Ive also got a 750 It wasnt until I turned the fuelair mix screw out to about 3.5 full turns (stock is about 2.5) from closed that that problem went away.

I had changed the main jet out for a larger one and needed to adjust.

Share Report Save level 2 2003 Harley Sportster 883, 2001 Honda Shadow Spirit VT750DC Original Poster 4 years ago Yeah, Ive opened those fuckers up all the way.

Unfortunately its not taking care of the issue for me.

Share Report Save Continue this thread level 1 4 years ago I have the same bike.

Did you examine the carb diaphragms for tears or leaks They also need to be installed in correct orientation.

Vt750 Air Fuel Mix Screw Mod And Put

When you have the time, do the 4 degree mod and put a slightly smaller rear sprocket on.

It made a huge difference in performance.

Share Report Save level 2 2003 Harley Sportster 883, 2001 Honda Shadow Spirit VT750DC Original Poster 4 years ago Yep.

I even had a more experienced carb guy take a look at the diaphragms.

We agree that theyre in great condition.