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post #1 of 16 (permalink) Old 06-05-2010, 12:59 AM Thread Starter
 
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backfiring on revolt

Hello all, just got my used but in great shape 09 revolt XL.Have not really been able to ride it around alot, but today was the first day I GOT TO TAKE IT FOR A SPIN OVER 5 MINUTES.I NOTICED IMMEDIATELY THE MOTOR WAS BACKFIRING AFTER LETTING OFF THE GAS,this revolt was just sent to me by the dealer and I was told it went through all the tests and diagnostics prior to shipment.Is this a problem related to the revolt, and how can it be resolved?I live on the East coast, so taking it back to the dealer is not an option.The motor was warm, it did not backfire when cold, after a few test laps it began to backfire after letting of the gas.I always with my 2 strokes attribute a backfire to a lean condition, is there a program I can purchase for the Revolt to do a diagnosis myself via the computer? Is there a easy fix to this?
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post #2 of 16 (permalink) Old 06-05-2010, 08:43 AM
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Re: backfiring on revolt

Quote:
Originally Posted by mudbogger View Post
Hello all, just got my used but in great shape 09 revolt XL.Have not really been able to ride it around alot, but today was the first day I GOT TO TAKE IT FOR A SPIN OVER 5 MINUTES.I NOTICED IMMEDIATELY THE MOTOR WAS BACKFIRING AFTER LETTING OFF THE GAS,this revolt was just sent to me by the dealer and I was told it went through all the tests and diagnostics prior to shipment.Is this a problem related to the revolt, and how can it be resolved?I live on the East coast, so taking it back to the dealer is not an option.The motor was warm, it did not backfire when cold, after a few test laps it began to backfire after letting of the gas.I always with my 2 strokes attribute a backfire to a lean condition, is there a program I can purchase for the Revolt to do a diagnosis myself via the computer? Is there a easy fix to this?
This is a good Mike @ RRP question. Your back firing is due to a lean mixture situation. It comes from the EPA settings in the ECU. This was done to meet "Green Sticker" in California.
I dont think the dealer software, will let you in, to remap the ECU.
Try...
Watcon.com .... Webr850
or
Home Page ..... Queen Racing

Both these guys speak, WEBER!



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post #3 of 16 (permalink) Old 06-05-2010, 11:54 AM
 
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Re: backfiring on revolt

I would also like to know the answer to this mine will backfire when I ride it hard, I just figured its a typical four stroke and when you ride them hard and let off the throttle the backfire is from unspent fuel left in the exhaust?
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post #4 of 16 (permalink) Old 06-05-2010, 02:33 PM Thread Starter
 
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Re: backfiring on revolt

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Originally Posted by Bear Foot View Post
Quote:
Originally Posted by mudbogger View Post
Hello all, just got my used but in great shape 09 revolt XL.Have not really been able to ride it around alot, but today was the first day I GOT TO TAKE IT FOR A SPIN OVER 5 MINUTES.I NOTICED IMMEDIATELY THE MOTOR WAS BACKFIRING AFTER LETTING OFF THE GAS,this revolt was just sent to me by the dealer and I was told it went through all the tests and diagnostics prior to shipment.Is this a problem related to the revolt, and how can it be resolved?I live on the East coast, so taking it back to the dealer is not an option.The motor was warm, it did not backfire when cold, after a few test laps it began to backfire after letting of the gas.I always with my 2 strokes attribute a backfire to a lean condition, is there a program I can purchase for the Revolt to do a diagnosis myself via the computer? Is there a easy fix to this?
This is a good Mike @ RRP question. Your back firing is due to a lean mixture situation. It comes from the EPA settings in the ECU. This was done to meet "Green Sticker" in California.
I dont think the dealer software, will let you in, to remap the ECU.
Try...
Watcon.com .... Webr850
or
Home Page ..... Queen Racing

Both these guys speak, WEBER!
Is this condition something of a concern to the motor? Should I be looking into remappping the ECU somehow? Dealer only have the means to do this I assume?
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post #5 of 16 (permalink) Old 06-05-2010, 06:53 PM
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Re: backfiring on revolt

Quote:
Originally Posted by mudbogger View Post
Quote:
Originally Posted by Bear Foot View Post
Quote:
Originally Posted by mudbogger View Post
Hello all, just got my used but in great shape 09 revolt XL.Have not really been able to ride it around alot, but today was the first day I GOT TO TAKE IT FOR A SPIN OVER 5 MINUTES.I NOTICED IMMEDIATELY THE MOTOR WAS BACKFIRING AFTER LETTING OFF THE GAS,this revolt was just sent to me by the dealer and I was told it went through all the tests and diagnostics prior to shipment.Is this a problem related to the revolt, and how can it be resolved?I live on the East coast, so taking it back to the dealer is not an option.The motor was warm, it did not backfire when cold, after a few test laps it began to backfire after letting of the gas.I always with my 2 strokes attribute a backfire to a lean condition, is there a program I can purchase for the Revolt to do a diagnosis myself via the computer? Is there a easy fix to this?
This is a good Mike @ RRP question. Your back firing is due to a lean mixture situation. It comes from the EPA settings in the ECU. This was done to meet "Green Sticker" in California.
I dont think the dealer software, will let you in, to remap the ECU.
Try...
Watcon.com .... Webr850
or
Home Page ..... Queen Racing

Both these guys speak, WEBER!
Is this condition something of a concern to the motor? Should I be looking into remappping the ECU somehow? Dealer only have the means to do this I assume?
I don't know of any dealers that can remap the ECM to change the fuel system. You have a couple options that I am aware of. Big gun has developed a fuel programmer for the Redlines that I sell ( I am a Big Gun dealer). It is Plug and Play and it allows you to increase and decrease injector on time to tune your fuel system (List price $270 I sell them for $249). The other option is to get a new ViPec ECU from Mark at Queen Racing. The ViPec is fully adjustable; fuel, timing, fan on and off etc.. If you turbo your Revolt someday it will handle that too. I am not sure what his current price is. The last time I checked it was $2400 dollars for a locked one and $2800 for an unlocked one that your can adjust yourself with you laptop (Mark will set up the base mapping and is good to work with you).

The backfiring or lean pop condition is an idiosyncrasy of the Redline programming for the Weber engine and "as said" to meet EPA standards. Turning up the fuel will help and give you a few more Hp too. I have sold a number of programmers and have had zero complaints with the programmers thus far. I have one on my Revolt and love it.

Mike

Problems? Questions? Need parts or Repairs? Send us an e-mail, PM, or Call (435) 705-9846

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Last edited by Red Rock Powersports; 06-05-2010 at 07:42 PM.
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post #6 of 16 (permalink) Old 06-05-2010, 07:03 PM
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Re: backfiring on revolt

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Originally Posted by afastcar View Post
I would also like to know the answer to this mine will backfire when I ride it hard, I just figured its a typical four stroke and when you ride them hard and let off the throttle the backfire is from unspent fuel left in the exhaust?
I have heard this explanation too regarding unspent fuel in the pipe causing a backfire. When I questioned the factory about it they said that they took as rich as they were allowed to get Hp and maintain EPA standards and that some times fuel will puddle in the mid pipe and "pop". When Big Gun developed the programmer for the Redline / Weber they picked up on a lean condition in the fuel system and built a base map into their programmer to make a change especially needed with an opened up intake and exhaust system. From their base map you can tune your fuel system to your liking.

Problems? Questions? Need parts or Repairs? Send us an e-mail, PM, or Call (435) 705-9846

E-mail: [email protected]

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post #7 of 16 (permalink) Old 06-05-2010, 07:35 PM
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Re: backfiring on revolt

I'm running the Big Gun Programmer and it does fix the "popping", plus a lot more power.



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post #8 of 16 (permalink) Old 06-05-2010, 10:46 PM
 
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Re: backfiring on revolt

Get a Big Gun Programmer and exhaust from Mike at Red Rock Rails and this will fix your problem. If costs a few hundred bucks but well worth the money. Otherwise you'll have to put up with the backfiring issue.
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post #9 of 16 (permalink) Old 06-06-2010, 09:00 AM Thread Starter
 
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Re: backfiring on revolt

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Originally Posted by Bear Foot View Post
I'm running the Big Gun Programmer and it does fix the "popping", plus a lot more power.
Did you just get the programmer and keep the stock exhaust? Was the programmer simple to understand-what the program set up for different mods or is it all manual?I have heard that some dealers will reset the ECM for you if you mail it back to them, any truth to that Mike by chance?
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post #10 of 16 (permalink) Old 06-06-2010, 09:19 AM
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Re: backfiring on revolt

The Big Gun Programmer is a plug and play set up. The default programming works pretty good.
It would work better, with a pipe though.



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