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RiujinZero · April 27th, 2011, 11:27 AM

My 2 cents...

Most gasoline engines can't handle much more than double their stock horsepower assuming a volumetric efficiency of 70-80% with a maximum volumetric efficiency of about 140-160% before things start to blow and give.

The 250 has a volumetric efficiency of 128% which means it probably can't handle much more than another 30% increase in efficiency without doing a complete rebuild of the motor from the ground up.

I highly doubt Kawasaki built it any stronger then what they expected it to be used for.

Though I 100% believe you can turbo the carbed 250 I 100% believe you will need around 4-6 grand to even come close to the numbers you want.

Feasibly on a stock motor I don't see much more than 40whp before your engine blows.

April 27th, 2011, 11:27 AM	#39
RiujinZero ninjette.org member Name: Tom Location: Maryland Join Date: Apr 2011 Motorcycle(s): 2008 Ninja 250R Posts: 13	My 2 cents... Most gasoline engines can't handle much more than double their stock horsepower assuming a volumetric efficiency of 70-80% with a maximum volumetric efficiency of about 140-160% before things start to blow and give. The 250 has a volumetric efficiency of 128% which means it probably can't handle much more than another 30% increase in efficiency without doing a complete rebuild of the motor from the ground up. I highly doubt Kawasaki built it any stronger then what they expected it to be used for. Though I 100% believe you can turbo the carbed 250 I 100% believe you will need around 4-6 grand to even come close to the numbers you want. Feasibly on a stock motor I don't see much more than 40whp before your engine blows. __________________________________________________ 2008 250ARGHHH.... Factory Pro jet Kit, K&N Pod Filter...more to come.