Question about 2004 Mondial RZ Nuda

1 Answer

I want to have flames and backfire with my exhaust pipe..

I have a mondial 70cc motorcycle.. I want to have backfire/flames through my exhaust pipe... So, i need some help coz 1 of my friends who ride the same bike has fixed one on his bike.. dats seems really cool.. when he accelerates or change gear,it makes a loud boom (explosion) and flames come out through his exhaust pipe.. all i know is that i can hoot an another spark plug in my exhaust pipe,and using a relay i take electricity from my battery and put a switch attach to it.. so as i press the switch the spark plug ignites on the exhaust,and as the fuel burns it makes an explosion.. i really want to have an idea about fixing the relay and spark plug.. if i could have a clear handwritten would really be nice.. thanks in advance friends..
i really count on fixya here coz i know everything has got a solution here..

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 404 Answers

Blimey you really are on the Ball with this request. Do you realise that continuous and repeated deliberate miss firing can and will possibly damage your engine and blow the exhaust system apart?
Why go to all that trouble? When I used to do it I just shut the kill switch off whilst de-cellerating open the throttle a little the turn it back on (Bang/Flames) doesn't do it every time but with practice you can get it most times and the longer you shut off the louder the bang.
This was for OFF ROAD trials only!!!
The reason I have given you the tip above is because it looks a seriously dangerous area you are going into with spark plugs and seperate batteries.
I personally would leave well alone.
Paul 'W' U.K.
Press the Blue button please for rating of my effort!

Posted on Jan 27, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Back fires rich exhaust

Preventing Backfire on Motorcycle Exhausts ' DoItYourself ...
When the engine on your motorcycle has an emission system malfunction, such as anexhaust leak or a moment of running rich or running lean, backfire can ...

Exhaust backfire, popping when letting off throttle - Motorcycle Forum > ... > General Motorcycle Discussion

Apr 26, 2009 - 28 posts - ‎17 authors
Exhaust backfire, popping when letting off throttle General Motorcycle Discussion. ...You can damage the engine by running too lean or rich. Backfires on deceleration
21 posts
Jan 24, 2015
What causes a bike to back fire?
8 posts
Jul 15, 2012
At my wits end! Backfiring and fouled plugs on ...
13 posts
Feb 26, 2011
More results from

Glad That You Asked. Why Do motorcycles Backfire? at Cyril ...
Jun 12, 2010 - A visible flame may momentarily shoot out of the exhaust pipe. ...Another backfire situation occurs when the engine is running rich, meaning ...

Is backfire when decelerating a bad thing? : motorcycles

Jan 31, 2016 | Motorcycles

1 Answer

Honda gx160 petrol generator,gets very hot on the muffler,then starts to backfire and flames come out of the exhaust on the muffler

You need to get the exhaust away from the generator (heat shield) because it is getting to hot and this will cause it to backfire

Dec 31, 2014 | Motorcycles

1 Answer

I have a 03 wr 250, it idles ok but backfires and throws small flames from ex when throttle is opened fast, but not opened slowly,

Nothing wrong with a bit of overfueling, the flames are a bit of a worry though. If the ignition timing is too far retarded, the mixture will still be burning when it leaves the chamber. Also if the spark plug is gummed up, that may cause a problem of miss firing causing flames in the exhaust pipe.

Mar 27, 2011 | 2003 Yamaha WR 250 F

1 Answer

2007 yamaha yz450f... while riding last week it was backfiring on deceleration. it blew a 5 inch hole in the header pipe. i purchased a new one, cleaned the air filter, changed the oil and put a new spark...

Exhaust leaks near the exhaust port can draw air into pipe on deceleration and detonate any unburnt fuel leaving engine, causing backfire and high temps.
An overly lean fuel mixture on the engine can make decel backfire worse too.

Mar 13, 2011 | Yamaha YZ 450 F Motorcycles

1 Answer

2000 legend 900, new t o me. Backfires flame out of the exhaust. It looks like aftermarket pipes. Should I rejet or go back to original exhaust?

well if you like the sound and looks of the aftermarket pipe then rejetting would be the best thing to do to solve the problem and to keep the performance and sound. if you are not wanting to deal with the rejetting then the easiest fix would be to put the stock pipe back on. if you need more help or info just ask.

Sep 05, 2010 | 2001 Triumph Legend TT

1 Answer

I have a 1998 gsx750fw, it will try to start when you hold the starter switch on. as soon as you let go the motor stops then back fires through the pipe and carbs.i am baffeled?

Remove the exhaust pipes, then try it. If the exhaust is mostly blocked, once you stop trying to start it, the pressure in the exhaust will push the engine backward.

Also, a very lean mixture will cause backfiring. The flame travel through a really lean mixture is about the speed you walk, and is still making its way through the mixture when the cranking stops, then it flows up the intake port through an open valve, if there is one, and you get a rapid burn between the carb and the valve.

Jun 15, 2010 | 1998 Suzuki GSX-R 750 W

1 Answer

Backfiring on deceleration from exhaust pipes

May be running too lean or too rich. Check the color of your plugs, black dry and sooty means they are rich, white with blisters lean.

Apr 03, 2010 | 2005 Honda VTX 1300 R

2 Answers

I ahve a 2003 Road King, with fuel injection, I`d always heard about true duals, so being a welder and fabricator, I took my stock exhaust and removed the cross over pipe, welded the holes, and reinstalled...

You need to get a race tuner for the bike. When you made changes to the pipes you changed the pressure that the ECM was looking for and that's why the bike is backfiring on deceleration. You need to get a race tuner (Harley's Screaming Eagle Race Tuner, Power Commander V). These tuners will allow you to adjust the ECM settings so that you can control the amount of fuel unburned in the cylinders. My suggestion is to go to and look at the power commander (since you like to play with your own stuff).
Also take a look at which has a wealth of knowledge on the HD.
Good luck!

Sep 16, 2009 | Harley Davidson FLHR - FLHRCI Road king...

1 Answer

Bike backfires and at an idle it shoots out a blue flame

Purchase a EFI controller. I suggest a Fi2000R. It is easy to hook up and fairly easy to set by the instructions.

Aug 15, 2009 | 2004 Yamaha FJR 1300

1 Answer

Engine back fire

Hi ...... If problem continues try switching petrol off at the tap overnight or when you stop the bike. Sounds like petrol is leaking pass the petrol tap and sitting in the bores and exhausts, soon as you start it up it's igniting in the pipes. Remove the plugs and the colour will indicate how the jetting is set up.

Dec 30, 2008 | 1991 Suzuki VS 1400 Intruder

Not finding what you are looking for?
2004 Mondial RZ Nuda Logo

756 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mondial Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers


Level 3 Expert

77499 Answers


Level 3 Expert

102366 Answers

Are you a Mondial Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides