YZ 125 long rod crankshaft

F1 Moto
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Performing well worldwide.Taking the Lorretta's area win at swan MX (well done Wristin Griggs).
Available & in stock for worldwide delivery.
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FGR01
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FGR01 5/9/2017 7:18pm
5/9/2017 7:18pm
What are the benefits over a standard engine? Have any dyno comparisons to share?
F1 Moto
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F1 Moto 5/11/2017 5:43am
5/11/2017 5:43am
Longer piston dwell time at TDC, so better burn,not as prone to detonation which can be a problem with these bikes.
Better leverage ratio at mid stroke,different port timing,less piston acceleration = better reliability.
A win win.
Riders are reporting better bottom/mid range.
Holeshot machines.

Hope this helps ?
Paw Paw 271
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Paw Paw 271 5/11/2017 7:42am
5/11/2017 7:42am
If set up correctly the port timing will stay the same and it will rev a bit quicker.

Paw Paw
F1 Moto
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F1 Moto 5/13/2017 4:51am
5/13/2017 4:51am
Paw Paw 271 wrote:
If set up correctly the port timing will stay the same and it will rev a bit quicker.

Paw Paw
No port timing is different.
Crown height of piston is also different.
Kits can be tailored to suit most budgets.
If interested drop me a line at steve@f1moto.com.au

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F1 Moto
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F1 Moto 5/21/2017 9:52pm
5/21/2017 9:52pm







Here's a cylinder i've just ported for a Yz 125 thought you 2 stroke fans might be interested to see ?


Blackjack31
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Blackjack31 5/22/2017 9:36am
5/22/2017 9:36am
Yeah but what does all this run you$? A lot of the reason we are "2 stroke" guys is because we like the fact that we aren't spending 1500$ for a new motor.

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