knocking noise above 3k??

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knocking noise above 3k??

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knocking noise above 3k?? - 7/4/2008 10:11:51 AM

01929er

Posts: 58
Joined: 2/5/2008
From: Edmond, OK / Bates City, MO
Status: offline

anyone have any idea what would cause this... i romped on it from 0-140 then slowed back down and came to a light...after i took off at the light when it would go past 3k it would start making a knocking noise...oil level is fine and the oil only has probably 300 miles on it.

Bike has just a touch over 20,000 miles on it

Cant hear it under nuetral revving, must be under a load..it gets so loud im scared to take it past 6k rpms...sounds like its coming from the head??

< Message edited by 01929er -- 7/4/2008 10:24:06 AM >

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01 Cbr 929rr - Flapper/Pair Mod, Hass HTEV delete, Hindle Slip-on shortened 4in, RK 520, Vortex Sprokets -1, +1, BMC Race Filter, PC3 usb, 954rr motor swap

Who Needs Paint When you have Rhino Liner?

Post #: 1

RE: knocking noise above 3k?? - 7/4/2008 1:14:13 PM

petrorr

Posts: 201
Joined: 10/14/2007
Status: offline

sounds like your bottom half is going south....I got a post somewhere in this forum explaining how I know...but I can pretty much guarantee that your crank bearings are shot. drain your oil and look for copper or metal shavings, if get, im right

(in reply to 01929er)

Post #: 2

RE: knocking noise above 3k?? - 7/4/2008 6:56:04 PM

sc929

Posts: 143
Joined: 8/21/2007
Status: offline

+1 my first thought was a wrist pin. It isn''t pinging right, do you have good high octane fuel in it??

(in reply to petrorr)

Post #: 3

RE: knocking noise above 3k?? - 7/5/2008 2:28:42 PM

seldon929rr

Posts: 406
Joined: 3/30/2006
Status: offline

couple differnt things. it could be a cam chain tensioner. the cam chain is on the right side under the tank.
if you listen when wearing a helmet the sound could be "thrown" to a different location.
mine did the same thing and it turned out being a dead spot in the chain.. check that and if any of the links are stiff it will make a "knocking" sound every revolution over the chain.

< Message edited by seldon929rr -- 7/5/2008 2:31:01 PM >

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God, family and bikes.

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RE: knocking noise above 3k?? - 7/5/2008 5:46:06 PM

01929er

Posts: 58
Joined: 2/5/2008
From: Edmond, OK / Bates City, MO
Status: offline

always run 91 in it and i road it with my helmet off to hear it better... i have heard the cam chain now from 2 different people..and i dont think it would be a rod or anything because it doesnt do it at idle or free rev where i had a race car that spun a bearing and it knocked no matter what rpm or if there was/wasnt a load...just in case though im gonna throw it in a buddies truck and take it up to a shop to get a look over i think

_____________________________

01 Cbr 929rr - Flapper/Pair Mod, Hass HTEV delete, Hindle Slip-on shortened 4in, RK 520, Vortex Sprokets -1, +1, BMC Race Filter, PC3 usb, 954rr motor swap

Who Needs Paint When you have Rhino Liner?

(in reply to seldon929rr)

Post #: 5

RE: knocking noise above 3k?? - 7/5/2008 10:53:02 PM

CROMAG

Posts: 72
Joined: 2/14/2006
Status: offline

Take a peice of garden hose against your ear and press it around the cam chain.... start it cold.. You''ll know right there if it''s a cam chain tensioner and save yourself some time to source out the noise thereafter. A cam chain tensioner is more like a rattle at idle and gets louder at the begining of throttle... Not to spook you but your issue does not sound like a cam chain tensioner :( Best of luck either way...

(in reply to 01929er)

Post #: 6

RE: knocking noise above 3k?? - 7/8/2008 6:25:11 PM

01929er

Posts: 58
Joined: 2/5/2008
From: Edmond, OK / Bates City, MO
Status: offline

well the local shop said they are 90 percent sure it spun a bearin so next question... i looked up what is needed for a 954 swap and this is what i found, do i really need all of this?

1. 954 motor/throttle bodies/ airbox do i really need the throttlebodies and airbox????2. 954 main wiring harness 3. CDI 4. instrument cluster/ subharness 5. startswitch 6. headlight switch (not sure if they interchange I know the start switch is different) do i need this???

Cash in hand to anyone that has any of this stuff as well

< Message edited by 01929er -- 7/8/2008 7:40:56 PM >

_____________________________

01 Cbr 929rr - Flapper/Pair Mod, Hass HTEV delete, Hindle Slip-on shortened 4in, RK 520, Vortex Sprokets -1, +1, BMC Race Filter, PC3 usb, 954rr motor swap

Who Needs Paint When you have Rhino Liner?

(in reply to CROMAG)

Post #: 7