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2017 OS Speed R2103 3.5cc Nitro On Road Engine

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2017 OS Speed R2103 3.5cc Nitro On Road Engine

Old 06-19-2018, 06:18 AM
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Thank you very much!!
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Old 06-22-2018, 04:22 PM
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What is the top end like on these engines? I heard from a friend that they lack abit on top compared to the Novaís? canít decide between these and the new Mephisto.
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Old 06-22-2018, 11:04 PM
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Originally Posted by implusepro View Post
What is the top end like on these engines? I heard from a friend that they lack abit on top compared to the Novaís? canít decide between these and the new Mephisto.
Haven't seen one of these around here but for me topspeed compared to the Novaís is about the same.
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Old 06-23-2018, 06:56 AM
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os will never fail you. really nice engine, very economic maintenance
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Old 06-27-2018, 12:31 AM
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What is GSR engine based on R2103? How is it better than Original R2103? d
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Old 06-28-2018, 10:07 AM
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Originally Posted by implusepro View Post
What is the top end like on these engines? I heard from a friend that they lack abit on top compared to the Novaís? canít decide between these and the new Mephisto.
Nope, you just have to gear right.
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Old 09-06-2022, 03:57 AM
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What would be the best current option for piston and sleeve for this engine? I run 16% fuel in europe. Is it the eurospec or just a stock 2103? I tried a 2104 but lets just forget about that.
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Old 09-06-2022, 04:07 AM
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Originally Posted by magnushedqvist View Post
What would be the best current option for piston and sleeve for this engine? I run 16% fuel in europe. Is it the eurospec or just a stock 2103? I tried a 2104 but lets just forget about that.
The Eurospec sleeve is a possibility but due to the low crankshaft timing of the R2103 you might not get all the advantage out of it.
So I suggest you stay with the original P/S

What happened with the R2104 sleeve?
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Old 09-06-2022, 04:42 AM
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I guess scratches on the piston.
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Old 09-06-2022, 04:46 AM
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Originally Posted by Roelof View Post
I guess scratches on the piston.
Yeep that's right. A huge crack in the piston and the sleeve actually broke and ripped it
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Old 09-21-2022, 03:34 AM
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Originally Posted by magnushedqvist View Post
What would be the best current option for piston and sleeve for this engine? I run 16% fuel in europe. Is it the eurospec or just a stock 2103? I tried a 2104 but lets just forget about that.
What about if I change crankshaft to the eurospec? Is that a better option than to build it back to r2103 specs?
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Old 09-21-2022, 07:47 PM
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Last edited by choisan; 09-21-2022 at 08:09 PM.
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