Why does my ktm backfire

This same issue can also occur on the exhaust side where if the cylinder is supposed to be pushing out the old air and fuel mixture but instead sparks while the exhaust valve is open it can cause your engine to backfire out of your exhaust pipe. This is why it is advised that if you plan to replace your spark plug wires on your car that you do them one at a time as to not get the wires mixed up and accidentally connect them to the wrong spark plugs on your engine.

On more modern cars they come with coil packs which eliminate the need for spark plug wires. If your engines spark plugs are not able to fully burn the air and fuel mixture in the cylinder this can cause the air-fuel mixture to ignite in the exhaust manifold causing a backfire.

If you are unsure of when your spark plugs were last replaced it would be a good idea to inspect them for carbon buildup and corrosion. If they do have a lot of carbon buildup on them it would be a good idea to go ahead and replace all of the spark plugs on your vehicle to eliminate this as a cause of your engine backfiring.

As you now know this can cause your engine to backfire out of the exhaust system if there is unburnt fuel in the cylinder. It is advised that if you plan on replacing your spark plug wires that you do them one at a time to not get them mixed up in the process. On older vehicles, with spark plug wires there will also be a distributor cap. A distributor cap is what sends the electricity through your spark plug wires to your spark plugs that are mounted in your engine.

Eventually, distributor caps can go bad and cause them to not send enough electricity through your spark plug wires to be able to fully burn the air-fuel mixture in your engine cylinder which can cause engine backfiring.

If you suspect that your distributor cap to be the culprit you can replace your distributor cap relatively easy. You should be able to find a replacement distributor cap at your local auto parts store or online, just make sure that you buy one that is designed to fit your vehicle.

If your carburetor is sending too much fuel into the air intake of your engine this can cause your engine to backfire. If you know how to adjust your carburetor on your car then you can adjust it to send less fuel into the air intake so that this no longer happens.

If you do not know how to do this yourself you may want to take your vehicle to a mechanic so that they could adjust it to correct this issue. Sometimes stuff gets built up inside of engines carburetors which can also cause them to not operate as efficiently and they need to be cleaned. If this is the case you can take some carb cleaner and an old rag to remove as much gunk and debris as you can to see if this helps out your situation.

Bike won't start - just backfires occasionally. Thread starter the Eel Start date Jan 5, Joined Sep 23, Messages 1, Likes 0. Ran fine for about 40 miles the other day and then started losing power - eventually died and would not start. I did notice that one drain tube there are 2 by the powervalve had popped off. I put it back on.

I have spark but it won't start and just backfires every so often. Any ideas? The top end was just done at a shop and I rode the bike fine for about 50 miles. Then this happened Last edited: Jan 5, Joined Jan 5, Messages 1, Likes 1. Check your silencer and make sure that the packing hasn't come loose and clogged the airway. I had a '97 Yam WR that did this. I found that somehow the core inside the silencer had broken and allowed the silencer packing to fall and clog the exit.

Joined Oct 15, Messages Likes 0. Do you have sufficent compression? A bike runs on these three things : compression spark fuel timing is also a factor but it is just the proper sequence of the above KiwiBird Lifetime Sponsor Jan 5, It's easy!

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Glad you're getting it sorted out. I suspect you'd have some problems getting the xcw plated, even with the street kit. Michael15 0. What about if your in-laws live in Arizona. Could I get it sent to there house in my name? Tree 0. Kris 0. Also the VIN is an indicator. Wakemedic 0. Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.