Anyone running a RPM ice cube big bore??

6 replies to this topic
  • The_Blue_One

Posted September 07, 2005 - 02:18 PM


I thinking about going to a 488-90 kit to boost the torque of my wr. I was going to try the Athena but it's always back ordered :banghead: :applause: So i've been looking for alternatives.

Should i sleeve the stock cylinder or just bite the bullet and get an ice cube?

Anyone go big on their wr?

  • Frostbite

Posted September 08, 2005 - 05:04 AM


I had Thumper Racing drill my 400 out to 430. I sent them my barrel and they pressed out the original sleeve, bored the casing, and pressed in the larger sleeve. They also supply the larger head and base gaskets and a jet kit.
The new sleeve is cast iron and a lot of guys had negative comments about going that way.
I don't notice the extra bit of weight or anything bad so far, just more power. The compression ratio stays the same and I don't find it much harder to kick over.

  • Canuck

Posted September 08, 2005 - 10:25 AM


riding buddy just "CUBED" his crf450, wow......turbo boost!

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  • Canuck

Posted September 08, 2005 - 10:25 AM


riding buddy just "CUBED" his crf450, wow......turbo boost!

  • The_Blue_One

Posted September 08, 2005 - 04:10 PM


riding buddy just "CUBED" his crf450, wow......turbo boost!

I went with the cube. :lol: I got it today looks pretty good. :banghead: I'll post up some shots if anyone is interested :applause:

  • The_Blue_One

Posted October 14, 2005 - 09:09 PM


Quick update :banghead:

The Ice Cube rocks :banghead: :lol: I got it bolted on in about 4 hours and had it out on the trails next day for a break in ride. It blew me away the difference between the 450 and 488. The power is still linear and controllable but there is a whole lot more :lol: I only have 20 hours on it so far, but haven't had any problems and doubt i will.

  • janosz

Posted April 12, 2006 - 09:39 AM


anyone have ice cube cylinder kit on yfz 450?????? is their any problems???


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