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OS R2104 engine Thread

Old 04-27-2021, 09:15 AM
  #136  
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Originally Posted by madjack View Post
Does anyone have experience with replacing the stock OS OEM bearings with ceramic bearings?
Was there a noticeable difference in the motor spooling up?

Thanks
For me there is no real noticeable difference between steel or ceramic.
Also very hard to understand when a ceramic bearing goes bad.
Overall it is cheaper to refresh a set of steel bearings compared to ceramics which really hurt your wallet.
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Old 05-04-2021, 07:00 AM
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Hey guys I seen in another post that a lot of the 2104 are having issues with piston scratching during break-in. Any advice on breaking one in to avoid this ?
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Old 05-04-2021, 08:41 AM
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Use a fuel with more oil (RTR fuel or add some extra castor) and be patient, take all the time and at least 2 liter of fuel.
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Old 05-04-2021, 09:39 AM
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Originally Posted by Roelof View Post
Use a fuel with more oil (RTR fuel or add some extra castor) and be patient, take all the time and at least 2 liter of fuel.
I use an engine heater also during the break-in process.
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Old 05-04-2021, 09:52 AM
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Originally Posted by Roelof View Post
Use a fuel with more oil (RTR fuel or add some extra castor) and be patient, take all the time and at least 2 liter of fuel.

Thanks
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Old 05-04-2021, 12:13 PM
  #141  
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Originally Posted by BigC2007 View Post
Hey guys I seen in another post that a lot of the 2104 are having issues with piston scratching during break-in. Any advice on breaking one in to avoid this ?
During-breaking, avoid high rpms.
Make your clutch come in very early and also make the shifting into second-gear early too.
Try to put load on the engine with early rpm, not the high screaming things.

Also put some extra oil, this will never hurt.
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Old 05-04-2021, 12:15 PM
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I just broke one in 2 weeks ago, didnt have any problems. Ranned on in the oil bath, then one bottle rich, let cool down, one bottle leaning it a bit each tank, then one bottle making power but on the rich side. I did add oil to the fuel
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Old 05-04-2021, 12:45 PM
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Originally Posted by VS_Rody View Post
During-breaking, avoid high rpms.
Make your clutch come in very early and also make the shifting into second-gear early too.
Try to put load on the engine with early rpm, not the high screaming things.

Also put some extra oil, this will never hurt.
Thanks Rody
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Old 05-04-2021, 12:46 PM
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Originally Posted by nitrodude View Post
I just broke one in 2 weeks ago, didnt have any problems. Ranned on in the oil bath, then one bottle rich, let cool down, one bottle leaning it a bit each tank, then one bottle making power but on the rich side. I did add oil to the fuel
Sounds good thanks Steve
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