Loud VTX

[David H.]

I just purchased a 2007 VTX with a Motor Trike conversion. The exaust that Motor Trike installed(?) is rather loud and backfires on deceleration. Is this normal for a 1300 and is there a remedy? I'm starting to think the loudness is the nature of the beast for a V twin, but am wondering if someone knows of a less aggresive sounding exaust system. The mufflers are slip-on. I am new to this forum and I expect this question has probably been asked numerous times, so excuse me if this is the case.

Thanks.

Dave

[americanbadass]

My guess is that the slip ons are more free flowing than the stock ones. That alone can get backfiring on deceleration. If you were to put a more baffled (retstrictive) slip ons, it could cure your issues. If you don't hate the sound of the current mufflers, you could get a programable compufire or Techlushion module which you could easily dial in by yourself-there are many options available.

[Scrounger]

Suggest you google VTXOA or VTX CAFE and search "pair valve removal" to help with your backfiring.

[Stephen]

Another thing that can cause back firing is a leak in the exhaust system (most often in the head pipe).

[Gorilla]

This is a common issue with your trike. MT uses Sampson pipes that are very close to being straight pipes. The common solution is to get yourself some stock or close to stock Harley Touring slipons and have them adapted. When finished the popping will be gone and it will me reasonably quiet. Looks great and the trike will run better with the added back pressure.

[Chumbly]

I had the same problem on my VTX 1800c, so my solution may be different...I put my old exhaust back on. Pair valve removal can help with back fire (if the 1300 has pair valves)... they are a device that pumps more air into the exhaust side of the valves to allow for completer (if that's a word), burning of the exhaust. This happens mostly during deceleration, causing what sounds like backfire (especially with thin walled exhausts). Modified exhausts are built lighter (quite a bit lighter as compared to the 1800c original)... this lighter material causes more noise to come through. It is an anti-polution device. Also check to make sure the exhaust head nuts are properly torqued (leaks will cause running poorly and back firing.)

[BIG DENNY]

I had the same problem on my VTX 1800c, so my solution may be different...I put my old exhaust back on. Pair valve removal can help with back fire (if the 1300 has pair valves)... they are a device that pumps more air into the exhaust side of the valves to allow for completer (if that's a word), burning of the exhaust. This happens mostly during deceleration, causing what sounds like backfire (especially with thin walled exhausts). Modified exhausts are built lighter (quite a bit lighter as compared to the 1800c original)... this lighter material causes more noise to come through. It is an anti-polution device. Also check to make sure the exhaust head nuts are properly torqued (leaks will cause running poorly and back firing.)

The 1300 and 1800 are two completely didn't animals,1800 is fuel injected and I think the 1300 is carberated. but the poping comes from a lean condition try setting the idle up alittle to keep the Rs up when shifting and down shifting

[rhino 2]

D-K Custom a sponsor here sells a product called Thunder-Torques.. That more than likely will solve the problem ' Worth a look see..

[W3JNP]

I had a VTX-1300 for a bit and replaced the stock pipes with Cobra's. The pair valve was removed but a popping condition persisted. Turned out the headers on the Cobra pipes were not as thick as those on the stock pipes and the acorn nuts did not tighten enough for a good seal. A set of washers were added and the problem was solved.

A good way to check for a leak is to use one of those fireplace lighters with the long neck. With the bike running put the flame around the headers. If there is a leak the flame will be sucked right to it.

[driver10]

Had the same problem with my wifes 2006 VTX trike. Found she had a cracked exhaust header on rear header pipe. tried wield it but would not hold just kept cracking. And Motortrike did not carry it anymore so went to Ramco and they sent it off to have one computer measured and bent. Works fine now. Also like someone else said if you are going to use the Acorn nuts put a couple a stainless steel washers under them. and be careful when you torque them. Only 13 ft.pds according to my shop manual.