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I just installed new hydraulic tappet set due to noisy old hydraulic tappets. 90% noise(tik-tik) is gone. 30-40 kilometres are done after new hydraulics installation but still 10% tik tik noise can be heard. So how to make engine less noisy after getting hot ? Push rod, cam gear, cam sleevee, Hydraulic tappet whole set changed recently.

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  • Are you using the correct grade / specification of oil? Has the oil and filter been changed recently? Is the oil reaching the tappets in sufficient volume? is one of the galleries (partially) blocked?
    – Solar Mike
    Commented Mar 31, 2017 at 15:07
  • @SolarMike i am using royal enfield liquid gun 15w-50 and changed about 1k kms
    – Bhargav Padia
    Commented Mar 31, 2017 at 15:08
  • So, what do the manufacturers specify as oil for that engine?
    – Solar Mike
    Commented Mar 31, 2017 at 15:09
  • @SolarMike its a default oil provided by royal enfield company service stations.
    – Bhargav Padia
    Commented Mar 31, 2017 at 15:11

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Tappet noise is a "feature" provided by RE on Classic 350. While it doesn't do any harm as such, you can get the tappet rods set changed (the ones on Himalayan seem to be better : these are lengthier and have a groove). Tappet noise doesn't get better with the mileage. It gets better only with tappet rod adjustments AFAIK.

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