HRC Needle or Equivalent

[Wheelie]

I'm going to start running a E85/Premium mix 50/50 on my EX and want a more aggressive needle to ensure the mid range fuel delivery is enough to meet the fuel demands of E85.

Is the HRC needle more aggressive than the stock needle in a 04/05 450 carb? If so, can I buy just the needle and what's the part number?

Thanks,
Jeremiah

[86250rrider]

i run the sparks needle...which MAY BE the hrc needle and it made a shocking improvement on mine. i have the 02 crf cam and race with race fuel and ride on 94 octane. it was certainly worth what i paid for it.