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Spartan426

2002 Yamaha YZ426 valve bucket color?

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Hey everyone, I'm buying a new cylinder head assembly and have found that the valve buckets/lifters come in three different designated colors I.e, black, yellow and blue. From googleing I did last night I couldn't find any information on them besides the colors have to do with the diameter and or length of the bucket/lifter.

My question is, since I'm buying a new cylinder head assembly what bucket color was stock/facotry for this bike? (2002 yamaha YZ426) also, what are the pros/cons of different sized buckets? is it a power tuning thing? or is it somthing like regional assembly where different countries use different colors and only one specific color works for that head?

Any insight would be much apprecheated!  :thumbsup:

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