Honda CRF250RX Cylinder Works Big Bore Kit Ride Review

The Cylinder Works Big Bore Cylinder Kit takes your Honda CRF250R or CRF250RX and adds another 20cc's, giving you 270cc displacement! With this kit you get top quality parts rolled into one package so you’ll be able to directly fit every component, torque everything down, and get back to riding. The cylinder itself is made from an OEM grade aluminum casting with a nickel silicon carbide cylinder sleeve that comes precisely sized and honed, giving your engine great ring sealing and cylinder wall longevity. To make things easier for you, the kit also includes the correctly sized piston, rings, wristpin, and gaskets to fit your new larger displacement bore perfectly. In this video, Justin gives us his thoughts on the 270cc Cylinder Works big bore kit after having it installed on his 2019 Honda CRF250RX for a few rides!
Shop Now | Cylinder Works Big Bore Cylinder Kit
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[@DirtZen]

I added the RedMoto 300 big bore kit to my 2019 250RX and it was a game changer. Highly recommend the big bore kits 👍✌

[@panic-revv85]

Just put a top end in my yz450f thanks to your vids. Fired right up, keep up the vids.

[@345Dion]

Does the mapping switch still work with the big kit? I have a CRF 280 r big bore but the mapping doesn't work?

[@Enuroracer222]

Any reason yall chose the Cylinder Works 270 kit rather than the Red Moto 300 kit?

[@ramonnavarrolage8810]

I have the 300 Redmoto and is top. I imagine Cylinder Works is cheaper and easier to get cause the Redmoto is from Europe.

[@grantkarr5187]

I can’t tell u how much I a soul it’ll love ur videos

[@aidanvelthuis1267]

I purchased one of these Honda’s, I love it and I planned on putting a kit in when my cylinder wears out, is there any other modifications that must be done to accommodate the kit, and is there any reliability issues when you install a big bore, any help would be greatly appreciated

[@davidpalmer287]

Are you still using the stock ecu and if so is a remap required when installing the big bore kit?

[@jorgecantos5657]

I hace the same cuestión cause y put on mi bike and does not work

[@quadcityracing]

Tokyo Mods can remap the ecu

[@davidpalmer287]

@@quadcityracing that is where ive sent other ecu's in the past. I just wondered if its required for big bore. Ill probably just call tokyo mods and see what they think

[@quadcityracing]

@@davidpalmer287 yeah, you should remap. They did two 270 Crf’s for me, both ran perfect.

[@davidpalmer287]

@@quadcityracing what year model did you put the big bores in, and is it worth the money? I have a 2018 and just would like to have a little more bottom end power.

[@ramonnavarrolage8810]

This bikes are great but need heavier flywheel.

[@345Dion]

Stock ecu?

[@rmatvmc]

Yes, this is the stock ECU.