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  1. #1
    Registered User
    Join Date
    Jan 2017
    Location
    Lynchburg virginia
    Posts
    26

    Noise

    2000 r1150gs. 70k

    Engine knocks. Understatement.

    Set the rocker shafts. Minimum clearance.

    Put in 1200 pushrods. Could tell a difference in head noise after but changed this knock not one bit.

    Chain tensioners replaced. No change.

    Noise changes slightly with clutch depressed. Worst at steady 16-1800 then release the throttle. Can actually feel the knocking in pegs.

    Can only think bearings have play. Possibly rear main bearing? Can I check for rear bearing play without pulling engine?

    Engine runs amazing with no hesitation. No surging. Doesn’t burn oil. Just sounds so bad once warm people actually ask if engine is failing.

    Any thoughts appreciated.




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  2. #2
    Registered User
    Join Date
    Mar 2013
    Location
    North of Vernon BC
    Posts
    40

    Oil Discussion Alert!

    What are you using for oil?

    My '04RT at purchase with 104,000 miles had a disconcerting knock when It was hot with the clutch lever pulled in that was all but eliminated when I started using Mobil 1 V-twin 20-50 oil.

    My first oil change when chasing the racket was to Amzoil 20-50 and that didn't seem to help much; then I tried the Mobil 1 V-twin oil and have used it exclusively ever since.

    I know there's an underlying cause for the knock and/but I'm still waiting for the stupid thing to roll over and die at 123,000 miles. Because of the mc's previous use I suspect the thrust bearing, what or wherever that is, is worn.

    Available at Wally World in the US most of the time and probably other places as well.

    I also use the Mobil 1 MI-102 filter because it is readily available here at the Canadian Tire emporium and it seems to perform adequately.

    YMMV & donning Nomex.
    '79 CB750L, '80 CB750C, '81 CB900C, '04 RTP: We hates it 'til we rides it!

  3. #3
    Registered User
    Join Date
    Jan 2017
    Location
    Lynchburg virginia
    Posts
    26
    Quote Originally Posted by 179411 View Post
    What are you using for oil?

    My '04RT at purchase with 104,000 miles had a disconcerting knock when It was hot with the clutch lever pulled in that was all but eliminated when I started using Mobil 1 V-twin 20-50 oil.

    My first oil change when chasing the racket was to Amzoil 20-50 and that didn't seem to help much; then I tried the Mobil 1 V-twin oil and have used it exclusively ever since.

    I know there's an underlying cause for the knock and/but I'm still waiting for the stupid thing to roll over and die at 123,000 miles. Because of the mc's previous use I suspect the thrust bearing, what or wherever that is, is worn.

    Available at Wally World in the US most of the time and probably other places as well.

    I also use the Mobil 1 MI-102 filter because it is readily available here at the Canadian Tire emporium and it seems to perform adequately.

    YMMV & donning Nomex.
    Will do that this week. Anything opposed to teardown.

    Am going to pull trans this winter for splines. Guess we will see if there are any leftover beer caps rattling around in there.

    Thanks much


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  4. #4
    Registered User
    Join Date
    Mar 2013
    Location
    North of Vernon BC
    Posts
    40
    Mmm yeah. Splines this winter also...

    Let us know if you have success!
    '79 CB750L, '80 CB750C, '81 CB900C, '04 RTP: We hates it 'til we rides it!

  5. #5
    Registered User
    Join Date
    Jan 2017
    Location
    Lynchburg virginia
    Posts
    26
    I will most surely. Lots of good reads here and helpful folks. Bike is getting some age but I like it enough to do what I need to get it right.


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