SuzukiSavage.com - Backfire

John_D FSO

Serious Thumper

Offline

Ridin' and smilin'

Posts: 1658
Vancouver, WA
Gender: male

Re: Backfire
Reply #15 - 09/08/09 at 01:36:11

marine5317 wrote on 09/07/09 at 20:01:17:

It might sound good using the kill switch, but remember when you use the kill switch with it still running you are washing the oil film off the cylinder wall with unburned gas.
Ride Safe
Marine5317

I imagine the same applies to the kickstand kill also. Undecided

As fun as it may be, it's not something I do often. It is fun to do in a tunnel though! Grin

Back to top

'07 ElectraGlide.

IP Logged

4carbcorvair

Full Member

Offline

SuzukiSavage.com
Rocks!

Posts: 175
Maine
Gender: male

Re: Backfire
Reply #16 - 09/08/09 at 07:00:32

Mine used to run better with the choke pulled out to the first notch. Sure sign of running lean. I installed a Dyna muffler, which I do get complimented on the sound. This exagerated the lean issue further, not good. Header pipe started to blue. I rejetted one size up to a 150, up on the pilot and 3 washers in place of the spacer. I would have to say that with this exhaust and the carb mods, it is set perfect. No black soot. RARELY a backfire/puff/fart, whatever you want to call it. Not to mention the increase in power. Went on a ride this weekend and actually stayed on an 1100 crotch rockets back tire up to about 80/85 mph. Lets just say that the others I went with were definately impressed with my lil 650 single.

Rejet and forget.

Back to top

07 S40

IP Logged

jabman Senior Member Offline Posts: 411 England Gender:	Re: Backfire Reply #17 - 09/09/09 at 01:44:12 so is the puff on shut down normal or is it a symptom of something?
Back to top	93" savage, 177.5 main, 52.5 w/holes 3 turns out , middle circlip, 6" k&n round filter, Dyna muffler, TKAT brace IP Logged

justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Backfire Reply #18 - 09/09/09 at 07:13:17 A well tuned engine rumbles & grumbles, a Poof sometimes at shutdown is nothing. As long as it doesnt sound like a gunshot.
Back to top	The people never give up their liberties but under some delusion.- Edmund Burke. IP Logged

JustPassinThru

YaBB Newbies

Offline

SuzukiSavage.com
Rocks!

Posts: 21

Re: Backfire
Reply #19 - 09/14/09 at 22:40:12

marine5317 wrote on 09/07/09 at 20:01:17:

It might sound good using the kill switch, but remember when you use the kill switch with it still running you are washing the oil film off the cylinder wall with unburned gas.
Ride Safe
Marine5317

Not only that...you're pumping unburned, relatively COLD, gas and air past the red-hot exhaust valve and porting.

It's a good way to damage the engine if done regularly. Best way, the ONLY way, to kill it, is to let it down to idle and then kill the ignition. If I could find a way to shut it down with fuel or load, without wearing the clutch or waiting for the carb bowl to run dry, that's how I'd do it.

As for backfires...mine sounds like a gang war on deceleration. And EVERY time I shut it down...the engine winds down, there's a half-second of absolute silence...and then, either a >pop< or a BANG!, of various intensity.

Sometimes amusing, sometimes embarrassing, generally annoying.

Back to top

IP Logged

Mattdw

Full Member

Offline

Posts: 193
Frisco, TX
Gender: male

Re: Backfire
Reply #20 - 09/15/09 at 08:25:24

JustPassinThru wrote on 09/14/09 at 22:40:12:

marine5317 wrote on 09/07/09 at 20:01:17:

It might sound good using the kill switch, but remember when you use the kill switch with it still running you are washing the oil film off the cylinder wall with unburned gas.
Ride Safe
Marine5317

to kill mine, "bang free", I simply hold the front brake, bike in 1st, and slowly let out the clutch until she dies....never had a backfire once....

anyone see why that method would cause any problems/damage?
Not only that...you're pumping unburned, relatively COLD, gas and air past the red-hot exhaust valve and porting.

It's a good way to damage the engine if done regularly. Best way, the ONLY way, to kill it, is to let it down to idle and then kill the ignition. If I could find a way to shut it down with fuel or load, without wearing the clutch or waiting for the carb bowl to run dry, that's how I'd do it.

As for backfires...mine sounds like a gang war on deceleration. And EVERY time I shut it down...the engine winds down, there's a half-second of absolute silence...and then, either a >pop< or a BANG!, of various intensity.

Sometimes amusing, sometimes embarrassing, generally annoying.

Back to top

IP Logged

kel30734 Senior Member Offline Dragon Rider Posts: 486 Calhoun, GA Gender:	Re: Backfire Reply #21 - 09/15/09 at 08:46:32 I use my back fire to make Traffic Cops Wake up on the morning commute. there is a bridge I go over way out in the country and every now and a gin i will catch Barny Fife and Enus asleep in the car.... ease on by the and CAPOW there awake and cleaning their draws out.... I love my Thumper
Back to top	IP Logged

Mattdw Full Member Offline Posts: 193 Frisco, TX Gender:	Re: Backfire Reply #22 - 09/15/09 at 08:47:55 to kill mine, "bang free", I simply hold the front brake, bike in 1st, and slowly let out the clutch until she dies....never had a backfire once.... anyone see why that method would cause any problems/damage?
Back to top	IP Logged

JustPassinThru

YaBB Newbies

Offline

SuzukiSavage.com
Rocks!

Posts: 21

Re: Backfire
Reply #23 - 09/15/09 at 10:21:41

Mattdw wrote on 09/15/09 at 08:47:55:

to kill mine, "bang free", I simply hold the front brake, bike in 1st, and slowly let out the clutch until she dies....never had a backfire once....

anyone see why that method would cause any problems/damage?

Wear on the clutch.

I don't know how hardy that clutch is...it might not be an issue; or it might destroy it over time.

Back to top

IP Logged