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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
YZ 250 piston?????
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[QUOTE="bigred455, post: 673877, member: 19827"] Yamalube 2 r is the reason why the crown of the piston is clean. That is all I ran in my 98 kx 250 and the piston crown looked just like you described every top end I did. I just had a look at a 98 yz 125 piston and power valves the crown was spotless and the valves were really clean.Just because the crown of the piston does not show a burn pattern does not mean the jetting is lean. Different oils show different colors or no coloring. Yamalube is the only oil I have seen that does not show a burn pattern on the piston being your jetting is close. Then again some motors may show a burn pattern using yamalube 2 r. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
YZ 250 piston?????
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