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05 YZ50F need more bottom end

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I have a stock 05 YZ250F. What upgrades could I do to get more bottom end? I'm not a very fast rider and don't carry enough speed around corners in tight tracks. I lke the bottom end my buddies 06 KX 250F has, makes it easier to clear jumps right after turns. Would a new pipe help?

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The 5 valve design is pretty much a mid to top deal. The only way to get a YZ 250f some bottom without cracking the engine open is to go to a loud pipe...a big no-no in CA

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My white bros. aluminum pro 2 helped the bottom on my 05 alot. only around 98 dbs if you get the small endcap (38mm)

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- Bigger rear sprocket.

- Bigger bore engine, i.e. more displacement

- High compression piston

- FMF PowerBomb or MegaBomb head pipe

- avNow or PowerNow

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What size bigger rear sprocket? Stock rear is 48T. Leave the front one stock? Thanks for the help!

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What size bigger rear sprocket? Stock rear is 48T. Leave the front one stock? Thanks for the help!

Put a 50 tooth rear sprocket on it and call it a day! Still not enough go with a big bore kit. I think a pipe is about the last thing I would spend money on personally.

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50T will make a difference, 49T is harder to tell.

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