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I have an 04 crf100f i was wondering would i do better boring it out or getting an aftermarket exaust for it.I hear the stock exaust is horrible and i believe it.I would like it to be track friendly.What one would you reccomend that i do.I would like it to get up speed out of the corners on a track so i can make the jumps.It barely does that just being stock.suggestions please!!!!!

there's no replacement for displacement! racers have been saying that since displacement measurements have been taken. if you can only do one then go with the big bore. it's more work to install and doesn't give you that look but it will give you more power. having said that you will then likely want to free up the exhaust and intake to take advantage of the new cc's.

we are in the midst of reviewing the BBR 120cc kit for the XR/CRF100. We hope to have it done in a couple of weeks..but so far it's going well.

ken

You are so lucky to get to try out all this new stuff Ken.

it's a tough job but someone's got to do it.

Thanks ken.I was leaning toward the big bore because it would give me more power and speed.



Thanks again,
Jake