Question about 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

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My 2002 750 ace keeps backfire when I rev it up

My 2002 750 ace keeps backfire when I rev it up put in new jets and new fuel pump what could it be ? can any one help tammy

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I have the same bike that backfires during deceleration. how do you access the carb adjustment screws?

MC

Posted on May 26, 2010

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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.

Posted on May 10, 2010

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1 Answer

Sputtering and backfire at the top end of all gears


That would be at the same Rev range in each gear,
Exhaust/ CARBY jets/valve timing /distributor timing vacc advance/fuel pump replace [or get it checked out.]

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unusual, would normally say air filter but thats new. theres no restriction on fuel is there from fuel tap. so it runs out and slowly fills, time you check its got fuel again. is there a breather into tank blockedi has it once on a bike that used exhaust paste. the person had put too much in and it blocked the exhaust.

Feb 15, 2013 | Motorcycles

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My 1998 Honda Shadow ACE 750 backfires alot when i let off the throttle. What causes this?


Sounds like your fuel air mixture is a little rich. Check your plugs, if they are black you are running rich which will cause some of the excess fuel to be burned off in your exhaust. Two common problems with a bikes fuel air mixture is bad plugs, if one does not fire consistently all the time it will leave excess fuel in the combustion chamber. Another would be a clogged air filter keeping the fuel air mixture unbalanced as well.

Lastly if you are able to, you may adjust your air fuel screws on your carb. However most Honda's are stock with Keihin carburetors and these air fuel screws are plugged so you cannot make adjustments without drilling out the plugs.

May 16, 2012 | Honda VT 750 C2 Shadow Motorcycles

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My bike will idel but won t rev. just cuts off


Starving for fuel.
Make sure carbs are getting fuel.
Make sure fuel filters are clean,
make sure fuel pump is working.

If carbs are getting fuel but wont rev, you need to clean your carbs because your jets are clogged

Dec 03, 2010 | 2000 Suzuki GSX 750

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I have recently put a jet kit in my 1999 kawasaki zx6E! It seems that when i get it at a really high RPM in 3rd, 4th, 5th and 6th gear, it spits and sputters like its starving for fuel. I was wondering if...


Your not reaching the RPM level for your rev limiter are you? The rev limiter will automatically shut fire off intermittently to keep the motor from damage at high RPM's. I have to admitt I am not up to par an all these newer bikes, but if you jetted the carbs, then I doubt you have a fuel pump on the bike. Most bikes with fuel pumps use fuel injection! Call the dealer who sold you the jets and ask them what else needs to be done, I am sure they will be glad to help.

Nov 16, 2010 | 1999 kawasaki ZZR 600

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

2 Answers

98 honda magna. had fuel stabilizer last october. now it starts with choke but won't rev or idle. only choke keep it running. switched out fuel. put new fuel and additives, but nothing good yet. what...


Even though you put stabilizer in the fuel, it sounds like the jets in the carburetors gummed up. Additives wont do much good at this point. You need to remove, disassemble and clean the carburetor passages and jets.

Jun 25, 2010 | 1998 Honda VF 750 C Magna

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