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Old 06-16-2024, 02:51 PM   #1
R0313   R0313 is offline
 
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BMS is it a really A SOHC 4valve engine?

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Originally Posted by Mumen Rider View Post
No, it's not counterbalanced. I bought mine from TXPS.






Run of the mill CG250.



The BMS website is inaccurate.
Thank you for your information if the Engine were an OHC 4-valve I think they would be asking more than $1600 for it. All the other factory OHC 4Valves sell for over 2K.


 
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Old 06-16-2024, 03:00 PM   #2
Thumper   Thumper is online now
 
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Originally Posted by R0313 View Post
Thank you for your information if the Engine were an OHC 4-valve I think they would be asking more than $1600 for it. All the other factory OHC 4Valves sell for over 2K.
We don't see OHC 4 valve Chinese bikes yet in North American market. They are OHC, but 2 valve. The Templars and Lifan KPX are good examples.
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Old 06-16-2024, 08:24 PM   #3
ProDigit   ProDigit is offline
 
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Quote:
Originally Posted by Thumper View Post
We don't see OHC 4 valve Chinese bikes yet in North American market. They are OHC, but 2 valve. The Templars and Lifan KPX are good examples.
It's the worst of 2.
I would prefer no overhead cams, just pushrod.
That way the engine has more torque, and able to go high speeds through extra tall gears.

Or get a fully ohc, that way there's almost no torque, but good enough HP.

But these hybrid engines, half pushrod, half overhead cam, are very inefficient.
Not quite as fast as OHC, not quite as efficient as pushrod engines, lower MPG. Overall worse.
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Old 06-16-2024, 10:06 PM   #4
Thumper   Thumper is online now
 
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Originally Posted by ProDigit View Post
?
?
But these hybrid engines, half pushrod, half overhead cam, are very inefficient.
Not quite as fast as OHC, not quite as efficient as pushrod engines, lower MPG. Overall worse.
No hybrids yet, whatever that is.
But the 4V OHC engine is available in a 249cc ZS engine.

One of our forum members has put it into a bike (photos!)
Here is the engine. He bought it from AliExpress and as I recall, fabbed it into his grom clone. Now that was an upgrade!

You can even get the 172FMM compatible head kit:
Click image for larger version

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-NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it


 
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