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98 yzf 400
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[QUOTE="Ol'89r, post: 1214792, member: 17212"] The 98 yz400f was the first year for Yamaha's modern thumper engines. Many changes have been made to this engine since it first came out. If you want to make it faster like the new 450's you will have to go to a big bore with a high compression piston and a cam would help.. Remember, there is no replacement for displacement. ;) If the clutch is slipping you will have to adjust it. If adjusting it doesn't help, you will have to replace your clutch plates. Refer to your manual for this. If you don't have a manual, get one. :cool: [/QUOTE]
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98 yzf 400
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