Question about Honda VT 750 Shadow Aero Motorcycles

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I have a 1999 Honda Shadow 750 ACE the marker lights are flickering and it backfires on decell after steady throttle, what could be causing this? I have tuned it up and cleaned the carb but it still does it. james.fealey@yahoo.com

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To help stop the popping replace the copper head o-rings and muffler to head pipe seals. Backfiring is typically caused by air leaking into the exhaust and igniting unburned gasses. Flickering lights indicate bad wire connections/grounds. Honda grounds the turn signals through the green wires. You will probably have to take off the seat and open up the headlight bucket. Try unplugging and replugging the orange,blue, and green wires going to all four turn signals. This should take poor contact and grounding out of the equation and sort out your flickering lights. Also go to the fuse box and take out the fuses one at a time and reinstall them. Make sure that the end caps of the fuses are not loose, if so, replace the fuse. Broken ar cracked fuses on older bikes can cause head scratching problems where there aren't any. Make sure that all your turn signals are grounded through the green wires.

Posted on Sep 05, 2010

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2000 Honda VT 750 CD Shadow A.C.E. Deluxe replace the throttle cable


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1 Answer

Stop back firing, throttling down all the way causes backfire


most of the time the timings been moved or the air and fuel is not set right, check your timing first.

Sep 10, 2010 | 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

1 Answer

My 1999 Honda shadow backfires on deceleration after steady throttle what could cause this? I have tuned it and cleaned the carb but it still does it.


The most common reason for backfiring is lack of back pressure from changing the exhaust. To compensate for the flat spot you get you put in a jet kit. This leaves the possibility of more unburned gas getting into the exhaust. Honda uses Kei Hin carbs with a fuel shut off diaphragm to help limit this condition (backfiring) by turning off the fuel to the carbs during deceleration. Even stock exhaust can pop or backfire. Typically it is caused by air getting into the exhaust either past the copper o-ring gaskets in the head or leaking muffler connections from the head pipes to the mufflers. Try replacing all the exhaust gaskets and you should minimize this condition.

Sep 05, 2010 | 1999 Honda VT 750 CD Shadow A.C.E. Deluxe

1 Answer

What size spark plug socket is used for the 750 shadow ace special edition?


My 1999 Shadow ACE uses 18mm socket, it will need to be a thin walled socket to fit all of them

May 29, 2010 | 1999 Honda VT 750 CD Shadow A.C.E. Deluxe

2 Answers

My 2002 750 ace keeps backfire when I rev it up


did you change the exhaust and air filter? if not, you should. bike is running rich. lean it out a little and you'll be alright.

May 04, 2010 | 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

1 Answer

Should I adjust my valves? 1999 Honda Shadow Ace.


Well if its running good and you don't here any out of the ordinary rattling I wouldn't worry about it until at least 25,000-30,000 miles on the bike so probabley in another 10,000 miles or so have the valves adjusted unless you hear any unordinary rattling noises sooner then go in at that point and have them adjusted.

Apr 21, 2010 | 1999 Honda VT 750 CD Shadow A.C.E. Deluxe

2 Answers

My 2002 ace shadow 750 has a back firering problem. The dealer that I take it to says thats just the way it is any thoughts.


If the backfiring is only on deceleration, the problem is most likely carburetors that are out of sync.

Oct 14, 2009 | 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

1 Answer

2002 HONDA SHADOW ACE 750 CARB


It sounds like you may have or will be jetting your carbs. I did this using the directions with the kit and used the Clyman manual for this bike to show me step by step how to remove the carborator. You will only need to attach 2 of the 4 hoses on your carb. syncronizer. If I remember right, you need to remove the bolt-on cooling fins to expose the engine block. The is a black screw or bolt that you take out and screw the threaded metal adapter of the sync tool. Be careful using the sync tool. Be very light on the throttle or the vacuum in the cylinder will **** in the mercury from the sync tool - not good. The problem you are stating on idle & backing off sometimes happens when the carbs are running rich (too much fuel) Hope that gets you in the right direction.

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