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If I was to add an Boyesen
Supercooler Water Pump Cover, & a Boyesen power valve cover would it really make a big difference in my 98 cr250r
 
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20170514_015734.jpg1496340722854.jpgFB_IMG_1496015125686.jpgFB_IMG_1496015485835.jpg
Yes, I highly recommend them. This is my 2001 & it runs 15% cooler than stock yet it has a 285cc big bore. The power valve is 5% larger than stock giving the bike more bottom end. You can also add an extra gasket or 2 to increase the power valve chamber even more.

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We're can I buy that cylinder head from? An would I have to big bore it to have 1 or is it powered coated

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Nice ass bike btw

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That's the stock head that I sent off with a 71mm Wiseco piston to have bored over & re-nickel plated/sealed to match said piston. The power valve will have to be shaved down to clear the oversized piston & then you'll have to drill 3-2.8mm or 3-3mm oiler holes in the front skirt just above the exhaust port when piston is at the lowest point of its stroke & just under the 2nd/lower piston ring. You can also have it stroked 4mm if you want but you'll loose that rip 2-strokes are loved for yet gain more torque. Basically it'll run, rather deliver it power to the ground more like a 4-stroke. The "color" difference your seeing is from me polishing then hammering the crank cases & inner clutch cover with a small ballpin hammer over & over again to create hammered aluminum (look/color). The head/jug/cylinder is just clean original aluminum. I've spent a lot of $ on this bike but it's what I've always wanted. 450r's cant touch it. Not on the bottom, mid or top of the power range bike for bike. Screenshot_2017-06-17-19-58-53.png

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We're can I buy that cylinder head from? An would I have to big bore it to have 1 or is it powered coated

Sent from my Coolpad 3632A using ThumperTalk mobile app


Nice ass bike btw

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The cylinder head is a PhatHead & you can pick & interchange your compression/done inserts as well ss your color.

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If I was to add an Boyesen
Supercooler Water Pump Cover, & a Boyesen power valve cover would it really make a big difference in my 98 cr250r
 
Sent from my Coolpad 3632A using ThumperTalk mobile app
 
 


Forgot to mention I also run oversized radiators with the Boyeson supercooler to get the 15% cooler running temp. You can get the radiators with your choice of silicone hoses for $100 or them alone for $85 with free shipping on e-bay.

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No, I forgot the 97-99 have one radiator. 2000 on have 2. One on each side up higher on the frame.

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You can still get a oversized radiator that holds more coolant with more air flow for your bike. They split & moved it in later years due to airflow issues from the front fender, # plate (front end in general) & mud/debris getting on it. They just came stock that way for those years.

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