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General Category >> Rubber Side Down! >> Question about backfiring
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Message started by rong on 05/11/13 at 21:14:57

Title: Question about backfiring
Post by rong on 05/11/13 at 21:14:57

I understand that the Savage/s40 backfires normally as it comes right from the factory. From this Savage website, I know this can be corrected with carburetor modifications. However, let’s assume that I keep it original. Does anyone know if this backfiring will eventually cause damage to the engine or the muffler over time? I own another bike that will backfire when certain mechanical conditions are not correct. The people on that website (for that particular bike) feel that the backfiring will cause damage to the engine over time (i.e. exhaust valve and muffler). Does anyone here feel that the S40 backfiring will cause damage to the engine, or muffler, etc. over time? One last thought. I live in California, and I see that the California S40 carburetor may be unique. … maybe even more restrictive and lean.
Open to your thoughts.

Thanks,
Ron G.

Title: Re: Question about backfiring
Post by Serowbot on 05/11/13 at 22:12:37

In theory,... huge afterfires ("backfires") can cause an exhaust air reversion that may effect the exhaust valves...(might effect something with time, if excessive)...
These are gun-crack explosions,... not usual pop, warble, blats...
If you're scaring pedestrians,.. I'd try to fix it... :-?...

If yer' muffler blows out from backfire,.. it was gonna' do it next week anyway...JMHO...
;D...

Title: Re: Question about backfiring
Post by ToesNose on 05/12/13 at 04:34:08

+1 to Serow, pops and cracks are characteristic to big singles. The gun shots may or may not cause issues down the road, either with your bike or neighbor ;D

Title: Re: Question about backfiring
Post by Routy on 05/12/13 at 05:21:26

The only damage I ever see happening from my bike's backfiring, is horses running right thru fences like they don't even know their there. And that hasn't happened yet, but it had me holding my breath a couple times. So I really control the backfire whenever I see horses. I don't know what it is about a stupid horse, but they panic at backfire :o
I find the stock Savage backfire so easy to control w/ throttle positioning, I will never be concerned about it,......beside that I kinda like it,....I always liked attention ! ;D

Title: Re: Question about backfiring
Post by justin_o_guy2 on 05/12/13 at 10:03:13

On the "Demo for buyer" run I did last week, mine hadnt been started in about 2 months, got her fired up & off the choke after about 30 seconds of it gaggin & tryin to die every time Id twist the gas a little. Finally got it ready to roll, took it up the drive & about 50 feet down the road,raised the idle up, back to the shop, where it sat & idled & accepted quick throttle input & slappin shut, rumbling & grumbling, no BANG,, steady idles,
on shut off it gave a very gentle Plumphh..

Title: Re: Question about backfiring
Post by rong on 05/15/13 at 11:03:34

Thanks for all of your input. Eases my mind...

Ron G