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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through October 16, 2008 » It's sounds like my bike is knocking at idle! « Previous Next »

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Moosestang
Posted on Saturday, October 11, 2008 - 05:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I'll try to get a video up latter today, but this can't be good. Sounds like it's coming from the top of the engine. I did change the timing tables to have 5 degrees at idle. I think i'll change it back and see if it makes a difference.
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Bads1
Posted on Saturday, October 11, 2008 - 07:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

How much ???
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Dogdaze
Posted on Saturday, October 11, 2008 - 09:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Do you accept Western Union moneygrams and will you ship to Somalia?
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Bluesboy
Posted on Saturday, October 11, 2008 - 09:45 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Gezz,I`d love a knock like that LMK if bads1 or dogdaze dosent take it!
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No_rice
Posted on Saturday, October 11, 2008 - 01:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

i'll take the bars, top triple clamp and cables.

hows $15 dollars shipped? i'd hate to spend to much if that knock affected the handle bars and they are usless when they show up...
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Moosestang
Posted on Saturday, October 11, 2008 - 05:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

You guys are too much! Can't someone important move this post to the xb board?
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Ulywife
Posted on Saturday, October 11, 2008 - 07:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Consider it done!
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Moosestang
Posted on Saturday, October 11, 2008 - 08:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Thanks! I'm going to reload the maps with no timing at idle like stock. I swear the engine didn't sound this loud at idle until I started F'ing with it. It stops once it's warmed up, but when it's cold there is a distinctive thund, thund, thund.

I will make a video tomorrow and post it.
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Bombardier
Posted on Saturday, October 11, 2008 - 09:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

'Oh give me a hole in the piston's my goal'
heh heh
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Dogdaze
Posted on Saturday, October 11, 2008 - 11:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

This thread was a lot more fun over in the "Classified" section.

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Xl_cheese
Posted on Sunday, October 12, 2008 - 02:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Thanks! I'm going to reload the maps with no timing at idle like stock. I swear the engine didn't sound this loud at idle until I started F'ing with it. It stops once it's warmed up, but when it's cold there is a distinctive thund, thund, thund.

I will make a video tomorrow and post it.


Check the ecm runtime tab. Note the numbers titled "spark advance." Start the bike cold and watch those numbers. Tell us what they do...

That will answer your question.

I really don't think the bike will need any advance at idle. If you're accelerating from a stop you have already reved the motor up to 12-1500 before letting out the clutch.

What numbers have you used for your square idle experiments?

Do you have an xb9 or 12?
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Moosestang
Posted on Sunday, October 12, 2008 - 08:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I have a 9. I think my square idle numbers were 65 front and 58 rear.

If I can find a auto parts store that will lend me a 260lb torque wrench, then i'm going to retorque the compensator nut with some red loctite. I've read on here that it will knock at idle when loose or does it always knock?

I know it didn't make this noise before and it sounds like it's coming directly from the cylinders.

The timing advance was 5 degrees in those boxes last time I had it hooked up, which is exactly what I put in the timing tables. I'm pretty sure it shows zero though until it goes into closed loop.

(Message edited by moosestang on October 12, 2008)
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Moosestang
Posted on Sunday, October 12, 2008 - 08:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Does anyone have the dimensions for that special tool (metal bar) that keeps the sprockets from turning?
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Xl_cheese
Posted on Sunday, October 12, 2008 - 10:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I have a 9. I think my square idle numbers were 65 front and 58 rear.

Try the idle trick I mentioned. I bet you get better results rather than using the all four squares are the same number approach.
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Rotzaruck
Posted on Sunday, October 12, 2008 - 04:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Moose
I just cut one of those!
I think somebody said 4.25" clarified with "about". Worked for me.
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Moosestang
Posted on Sunday, October 12, 2008 - 06:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Moose
I just cut one of those!
I think somebody said 4.25" clarified with "about". Worked for me.


Thanks!

Well here's a video after the bike warmed up some, still waiting for youtube to clear the cold idle video. I think it's just the push rods making noise, but it's louder now than when I first got it. I'll retorque that sprocket nut just in case.

warm idle, not completely warm though.

http://www.youtube.com/watch?v=uEvczmLregk

cold idle
http://www.youtube.com/watch?v=AZVyusWqNBQ



(Message edited by moosestang on October 12, 2008)

(Message edited by moosestang on October 12, 2008)
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Brumbear
Posted on Sunday, October 12, 2008 - 07:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

thats sounds like a lifter bleeding down when your not using it the slap ends up comming from play at the end of the pushrods. and after a little while the thing probably pumps up.
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Moosestang
Posted on Sunday, October 12, 2008 - 08:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

thats sounds like a lifter bleeding down when your not using it the slap ends up comming from play at the end of the pushrods. and after a little while the thing probably pumps up.

I'm green when it comes to push rod motors, so that is all greek to me. I'm going to beat on it tomorrow and see if it gets worse or better.
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Moosestang
Posted on Monday, November 24, 2008 - 08:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Just wanted to post an update. I changed my oil and oil filter and the noise is completely gone. I previously changed to mobile 1 v-twin and decided to try a conventional 20w50 to see if it made less noise and it did! I also changed from a pure one oil filter to the napa gold 1394.

I can't believe that the mobil 1 would cause the noise heard in my video. It tests as a very high 50 weight and shouldn't shear as much as a conventional. It's possible the pure one filter was to blame. I'm going to have to try the mobile 1 again to rule out the filter.
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