What would cause a back fire? - Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon Forum

jason · 08-19-2010, 01:41 PM

Was riding at Turkey Bay and my Foreman started back firing after getting back on the throttle at the bottom of the steep hills. I cleaned the carb, added a fuel filter, put in new plug, adjusted throttle cable to make sure butterfly are shutting. Set the pilot screw at 2 1/2 turns.
At the end of the day I was having to use the choke to get half throttle and turn off choke to idle.
What would cause this back fire?

Thanks
Jason

**toodeep** · 08-19-2010, 01:46 PM

It's still doing it after you cleaned the carb? Check the air filter also.

jason · 08-19-2010, 02:49 PM

It's still doing it, I rode down the road and it done it when I let off and got back on it for a corner. It runs good, just has a attention getter that goes along with it. I may need to clean the carb again. Look for something I didn't get clean.

jason · 08-19-2010, 02:51 PM

What would I look for on the air filter? It looks like its in place with the band tight. Lid is on tight.

h22ate · 08-19-2010, 11:58 PM

Any chance you have an exhaust leak somewhere?

Hondo · 08-20-2010, 09:18 AM

Exhaust leak was what I was thinking also. When my 400 was new it did that bad and Honda replaced the seal on the header pipe.

h22ate · 08-20-2010, 10:44 PM

Yep thats usually what does it.

garett · 08-21-2010, 12:12 AM

i wish mine would pop more.Love that sound

PsychoBoB · 08-21-2010, 12:45 AM

Quote:

Originally Posted by garett

i wish mine would pop more.Love that sound

just loosen your header bolts or take the spark arrestor out........

jason · 08-21-2010, 01:31 AM

I'll try the header bolts, I may have over tighten the bolts. Motor has around 15 hours on a rebuild.

08-19-2010, 01:41 PM	#1 (permalink)
jason Honda Rider Join Date: Nov 2005 Location: OWENSBORO KY Posts: 22	What would cause a back fire? Was riding at Turkey Bay and my Foreman started back firing after getting back on the throttle at the bottom of the steep hills. I cleaned the carb, added a fuel filter, put in new plug, adjusted throttle cable to make sure butterfly are shutting. Set the pilot screw at 2 1/2 turns. At the end of the day I was having to use the choke to get half throttle and turn off choke to idle. What would cause this back fire? Thanks Jason

08-19-2010, 11:58 PM	#5 (permalink)
h22ate Super Moderator Join Date: Aug 2009 Location: SW, Pennsylvania Posts: 4,635	Any chance you have an exhaust leak somewhere? __________________ 08 Rubicon 27" Bighorns on MSA Reapers 2" SSATV Lift Moose rear pack Moose heated grips, thumb warmer, gun racks and hand guards Custom Polaris Front and Rear bumpers Custom rack extenders Custom GSXR projector headlight Custom Stereo Superwinch 3k Snorkeled front and rear ‚——P--;===±--= <- !‚–’¯ƒ¹¶ Boilermaker L.U. 154 http://youtu.be/U71bn4ZF4K0

08-20-2010, 10:44 PM	#7 (permalink)
h22ate Super Moderator Join Date: Aug 2009 Location: SW, Pennsylvania Posts: 4,635	Yep thats usually what does it. __________________ 08 Rubicon 27" Bighorns on MSA Reapers 2" SSATV Lift Moose rear pack Moose heated grips, thumb warmer, gun racks and hand guards Custom Polaris Front and Rear bumpers Custom rack extenders Custom GSXR projector headlight Custom Stereo Superwinch 3k Snorkeled front and rear ‚——P--;===±--= <- !‚–’¯ƒ¹¶ Boilermaker L.U. 154 http://youtu.be/U71bn4ZF4K0

08-21-2010, 12:12 AM	#8 (permalink)
garett Honda Rider Join Date: Aug 2010 Location: Louisiana Posts: 47	i wish mine would pop more.Love that sound __________________ 09 Honda Foreman 4x4 27 mudweisers s-w extended back rack ammo can Stick Stoppers red foam grips audio tube

08-19-2010, 01:46 PM	#2 (permalink)
toodeep Administrator Join Date: Aug 2007 Location: south dakota Posts: 6,427	It's still doing it after you cleaned the carb? Check the air filter also.

08-19-2010, 02:49 PM	#3 (permalink)
jason Honda Rider Join Date: Nov 2005 Location: OWENSBORO KY Posts: 22	It's still doing it, I rode down the road and it done it when I let off and got back on it for a corner. It runs good, just has a attention getter that goes along with it. I may need to clean the carb again. Look for something I didn't get clean.

08-19-2010, 02:51 PM	#4 (permalink)
jason Honda Rider Join Date: Nov 2005 Location: OWENSBORO KY Posts: 22	What would I look for on the air filter? It looks like its in place with the band tight. Lid is on tight.

08-20-2010, 09:18 AM	#6 (permalink)
Hondo Honda Rider Join Date: Jun 2010 Posts: 76	Exhaust leak was what I was thinking also. When my 400 was new it did that bad and Honda replaced the seal on the header pipe.

08-21-2010, 01:31 AM	#10 (permalink)
jason Honda Rider Join Date: Nov 2005 Location: OWENSBORO KY Posts: 22	I'll try the header bolts, I may have over tighten the bolts. Motor has around 15 hours on a rebuild.

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