1098 Belt Alignment Question....

Discussion in 'Technical Help' started by Nelson, Mar 9, 2015.

  1. Anyone able to tell me what might be wrong here? :Banghead:

    IMG_1532.JPG

    IMG_1533.JPG
     
    #1 Nelson, Mar 9, 2015
  2. I'd take the belt off and see if it's flat or all wavy and twisted. Is the vertical ok?
    Sure you'll get a better response soon there are some belt gurus on here but if doubt, change it.
     
    #2 1037sps, Mar 9, 2015
  3. Your a tooth out Gary, exhaust cam needs rotating counterclockwise 1 notch :upyeah:

    image.jpg image.jpg
     
    #3 Tobytyke, Mar 9, 2015
    Last edited: Mar 9, 2015
    • Thanks Thanks x 1
  4. :):upyeah: what would the result be if you ran it like this?
    I didn't fit the belts BTW!
     
    #4 Nelson, Mar 10, 2015
  5. The exhaust valves won't be fully seated so a loss of compression loss of power I would imagine
     
    #5 Tobytyke, Mar 10, 2015
  6. Pinking type noises?
     
    #6 Nelson, Mar 10, 2015
  7. The valves will still close. At best it'll run crap/difficult to start but worse case you'll get valve to valve contact on the overlap or valve to piston contact.
    The 'T' slots in the cams should be aligned the same. The inlet is correct. as said above, the exhaust looks to be one tooth out.
     
    #7 nelly, Mar 10, 2015
  8. Bugger :/
    No marks on the belts - someone was (over?)confident...
     
    #8 Old rider, Mar 11, 2015
  9. i've pulled the head and no damage to valve gear or piston.
    Also slipped the cylinder off and big ends are good.
    I'm curious as to whether a tooth out like that would cause the noise I heard.
    Like a loud dang dang dang, almost 2 stoke exhaust sound?
    I went all over the motor when running and couldn't pin point the noise from the innerds.
     
    #9 Nelson, Mar 11, 2015
    Last edited: Mar 11, 2015
  10. Gosh...

    Maybe if you're lucky it's just compression leaking from the mis-timed valve - did you try turning the engine over by hand with no plugs in??
     
    #10 Old rider, Mar 11, 2015
    Last edited: Mar 11, 2015
  11. Yup - all turned ok
     
    #11 Nelson, Mar 11, 2015
  12. That has to be good news, surely :)
     
    #12 Old rider, Mar 11, 2015
  13. Surely is :)
     
    #13 Nelson, Mar 11, 2015
  14. Looks like you may have been super lucky and got away with it ;)

    Who the devil did that belt???
     
    #14 Old rider, Mar 11, 2015
  15. Is that the SF motor you thought was shagged?
     
    #15 Tobytyke, Mar 11, 2015
  16. Yes mate :)
     
    #16 Nelson, Mar 11, 2015
  17. With a bit of luck that might have been the only thing wrong then :upyeah:
     
    #17 Tobytyke, Mar 11, 2015
    • Agree Agree x 1
(You must log in or sign up to post here.)
Do Not Sell My Personal Information