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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> lugging sound...knock...what is it? /cgi-bin/YaBB.pl?num=1343353687 Message started by mojohand40 on 07/26/12 at 18:48:07 |
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Title: lugging sound...knock...what is it? Post by mojohand40 on 07/26/12 at 18:48:07 At idle and at revving in neutral (or with the clutch in) my engine ('98 with 13k) sounds pretty good. Like a "angry sewing machine" as some have said. But, if I lug a little, like say have it in 3rd when it should be in second...or have it in second when it should be in first...I get a pretty loud rapping sound. Kind of reminds me of the sound of the decompression solenoid at start up. Like a knock-knock-knock until the engine revs up. Now I know the answer is to not lug the bike....but what is hitting what when that happens? What makes that sound? Loose front pulley? is it normal and I'm just not used to a thumper? thanks! |
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Title: Re: lugging sound...knock...what is it? Post by Serowbot on 07/26/12 at 19:18:19 It's the piston banging it's head against the cylinder in frustration because you refuse to downshift, even though you know you should... ;D... |
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Title: Re: lugging sound...knock...what is it? Post by justin_o_guy2 on 07/26/12 at 19:38:16 I went to see my Doctor,, every time I leaned over a certain way & lifted anything over 30 pounds,, it hurt,, You know,, I Hadda PAY that guy & all he did was review my complaint & make sure he understood, then he said Dont Do That... |
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Title: Re: lugging sound...knock...what is it? Post by Oldfeller on 07/26/12 at 21:48:16 Tighten all your motor mounting bolts (3 sets of them) and stop doing that lugging nonsense. ;D You gonna rupture your crods if you keep on lugging at them. |
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Title: Re: lugging sound...knock...what is it? Post by Boofer on 07/27/12 at 15:54:59 imo lugging is worse than over revving. Push down on the shift thing. |
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Title: Re: lugging sound...knock...what is it? Post by ralfyguy on 07/27/12 at 16:59:54 From my experience the motor doesn't like it much below 2,500 rpm. At least not for accelerating hard. Just keeping the speed is fine, but I try to keep it above that. A multi cylinder motor is not as picky, but that big piston doesn't like it to be thrown around at low rpm. |
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Title: Re: lugging sound...knock...what is it? Post by Serowbot on 07/27/12 at 17:01:28 Correct me if I'm wrong,... but... I believe that sound is not anything physical,.. but it's still very bad... It's the sound of pre-ignition... The fuel is going boom while the piston is still traveling upward... .. so the boom hit's it like a hammer... Knock, knock... Who dare?... :-?... |
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Title: Re: lugging sound...knock...what is it? Post by justin_o_guy2 on 07/27/12 at 23:09:31 Yea, & I dont Dare do that,, I hate that sound. Till mine was broken in, It did that if I launched w/o keeping the RPM up pretty high, |
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Title: Re: lugging sound...knock...what is it? Post by Digger on 08/04/12 at 22:09:11 32303530373E313B6B6F5F0 wrote:
It's the sound of your motor telling you to stop doing that! All kinetically complex machines have languages. It's on us to try and understand them. It's when we can't understand the languages (or disregard their content) that we run into problems. As in the Space Shuttle (may she RIP) killing 14 fine human beings. The Shuttle always broadcast well in advance what her problems were.....but sometimes, we could not understand her cries..... :( |
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Title: Re: lugging sound...knock...what is it? Post by Serowbot on 08/05/12 at 01:31:08 Digger's pullin' the astronaut card... :-?... That's so COOL!... ;D... We Savager's have an astronaut in our family... Man, that's cool!... No matter how fast you've ever gone,... Digger has gone faster... That's amazing to me... What is it, Digger?... something like 25,000mph?... More?... (I wish I coulda' done that... not really, I don't even like the roller-coaster..)... :-/... Is a thumper really that torquey after all that?... :-/... .. but,.. Yunno'....... I've watched most of those shuttle launches... ... and I think we could take it,.. 0 to 60... Okay,.. maybe not straight up... :P... ;D ;D ;D... |
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Title: Re: lugging sound...knock...what is it? Post by Digger on 08/07/12 at 21:56:43 7B6D7A677F6A677C080 wrote:
Nope, only the Apollo guys got going that fast. We topped out at about 17,800 mph on STS-109. Still, 17.8 is faster than most Shuttle missions got....we needed the velocity since we were going to the Hubble Space Telescope (350 miles high, as opposed to the low 200's where the Space Station lives). |
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Title: Re: lugging sound...knock...what is it? Post by Borracho on 08/07/12 at 22:35:48 Hey, what is the best kind of oil to put in a spaceship? Synthetic or Rotella? Did you ever put Seafoam in the tank? |
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Title: Re: lugging sound...knock...what is it? Post by Serowbot on 08/07/12 at 23:10:03 686162707D343433040 wrote:
Seafoam?... of course they did... .. and a rabbit foot,..a chickin' foot, and a bible... 17,000 mph is not the time to take any chances... ;D ;D ;D... |
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Title: Re: lugging sound...knock...what is it? Post by thumperclone on 08/07/12 at 23:20:20 suck, compress,fire, blow four stroke single get in tune with her ;) |
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