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Shane_Bettin

engine mods?

7 posts in this topic

might be doing a top and bottom end rebuild soon on my 99 yz400f. when its apart i plan on doin some mods. what are some of the best mods out there for power and price. i'd want to keep running pump gas.

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Shane if you are doing your own work, and have the ability, buy a set of Falicon adjustable cam sprokets, and set your LC 's to 105. If you are using a 450 type auto cam you'll only use the Falicon stuff on the intake. Engine wise, after jetting and carb work cam timing is an easy cheap gain.

I would recommend if replacing a crank to update to an 01 crank and gear to eliminate the key issues on the CB gear.

PK

Sorry about the crank comment, I hadn't yet read your other post, but it is the truth.

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But not for the 450's, as best I can tell in the online catalog. If you do I would definitely appreciate the info on it.

I already have both the exhaust and intake cams on both 04yz250f's. They are a huge improvement over the stock cams. :cry:

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