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General Category >> Rubber Side Down! >> Raptor in, stock out
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Message started by Tomi on 05/25/15 at 19:18:34

Title: Raptor in, stock out
Post by Tomi on 05/25/15 at 19:18:34

My still-new-to-me Savage was intermittently acting funky - I describe it as lurching, like it's running out of gas when it's not - and it was doing it at various speeds, all temps, etc. Gas was fresh and so forth. SeaFoam added, but haven't gotten enough miles for it to have one anything yet.

I had planned the Raptor swap anyway, so we went ahead and did it since we were taking the stupid tank off to swap the plug (which looked fine) anyway.

Runs MUCH better immediately. Once we figured out the tank removal (simple, yes - AFTER the first time!), no problems at all. Took note of the thread on making sure no loose paint is present, and removed all of the paint (it was all flaky anyway - failure imminent?).

Funny thing is, the petcock had obviously been removed before. Not only was there the expected evidence of multiple tank removals, but the screws on the stock petcock were scratched up. Makes me wonder if that's why this bike got traded in - it was running funny and he couldn't fix it.

Anyway, thanks (again!) for the great information you all provide.

/me

Title: Re: Raptor in, stock out
Post by Serowbot on 05/25/15 at 20:40:38

You'z is done good...

Many happy miles to you... ;)...

Title: Re: Raptor in, stock out
Post by HAPPYDAN on 05/26/15 at 17:18:59

I bought mine new in 2012, and it almost got traded or sold before the first 100 miles. Fortunately, I had learned the forum lesson on a previous bike. So I found this site, and fixed my frustration. I guess your bike's previous owner wasn't so lucky. Good going, and enjoy the ride. Oh yeah - one more thing I just discovered - the S40 doesn't like ethanol. They say it has something to do with the low (8.5 to 1) compression ratio. The unburned E10 likes to explode in the muffler I guess.

Title: Re: Raptor in, stock out
Post by Tomi on 05/26/15 at 18:06:32

4C716A7D7C4C6F717B7D180 wrote:

Oh yeah - one more thing I just discovered - the S40 doesn't like ethanol. They say it has something to do with the low (8.5 to 1) compression ratio. The unburned E10 likes to explode in the muffler I guess.

I've read that in a couple of other threads. I live near Lake Erie, meaning we have multiple marina sources for non-ethanol gasoline. I'm considering getting a 5 gallon can and running it on that for a couple of weeks to see if it helps any.

Not that the afterfires bug me. And they bother my dad, which inspires me to leave it alone... ::)

/me

Title: Re: Raptor in, stock out
Post by old.indian on 05/27/15 at 10:25:19

Tomi wrote:
"Not that the after fires bug me. And they bother my dad, which inspires me to leave it alone. "
;D ;D ;D
Thank You Tomi...

Title: Re: Raptor in, stock out
Post by justin_o_guy2 on 05/27/15 at 11:49:56

Mine rumbled and grumbled on decel, but not between gears.
Properly tuned, Dyna exhaust, they run through the gears just roaring, but when you're going down through the gears they just rumble and growl, no gunshot popping,

Title: Re: Raptor in, stock out
Post by Tomi on 05/28/15 at 14:30:01

I don't have a lot of "pops" on decel, but I can absolutely count on one when I hit the kill switch. It's like the last firework on the 4th of July.

Title: Re: Raptor in, stock out
Post by Steve H on 05/28/15 at 14:39:51

I will get a small firecracker crack between first and second when it's cold. After the first shift, no more. Lots of burbling and stuff on decel.
I like to get a really nice loud boom on shutoff. :)

Oh, and, Welcome to the forum. Enjoy your bike.

Title: Re: Raptor in, stock out
Post by Dave on 05/29/15 at 03:45:38

465D04070601030C350 wrote:

I like to get a really nice loud boom on shutoff. :)

Well then rev the bike up just before you hit the key! ; :o

For a nice quiet shut down.....just let it idle for 15-20 seconds to cool down a bit before you turn the key off. ;)

It really is best to have the bike at idle before you turn the key off, as that will pump as little unburned fuel through the engine as possible. Revving the engine up on anything with a carb before you shut it off will pull a lot more fuel into the engine and pump it into the exhaust when the key it turned off.

Title: Re: Raptor in, stock out
Post by Steve H on 05/30/15 at 08:48:25

I get anything from a loud poof to a 12 gauge when sutting off depending on what I do just before turning off the switch.

If mine idles about 30 sec, I get little to no poof. Nice loud bang from running hard and immediately pulling up and cutting off.

Like Dave said, blip the throttle just as you turn off the switch, it'll get a bigger fuel charge and make a really nice loud noise. Watch people in the parking lot duck and dodge.

Since carbs aren't common these days, many people don't really even know what a backfire (afterfire) sounds like.