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Old 03-17-2008, 10:20 AM   #1 (permalink)
rosem1231
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Join Date: Feb 2008
Posts: 12
1999 670 HO jugs

Lost compression and scored the cylinder wall pretty badly. Not to the point where you can catch a finger nail, but you can feel it. Where can I get the jugs? Should I do both? How much should it cost to do the whole top end, including the jugs. Also forgot to mention that the head is also scored on the one side. If I go racing head with stock bore jugs, do mods have to be made to the carb jetting?
Thanks,
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Old 03-17-2008, 06:32 PM   #2 (permalink)
PoisonJello
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Join Date: Mar 2008
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if its not scored to bad just have it bored .020 over and get some oversized pistons (its a simple as that) but you should do both cylinders, if it is scored bad you might have togo .040 over..that is probably the cheapest way to fix it a piston kit starts at about $65+ each you will need a topend gasket kit $30+ and cylinders bored $35+ each..also remember to check the bottom end for metal pieces (with a magnet should do, if you have the engine out turn it upside down and give it a shake )
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Old 03-17-2008, 06:35 PM   #3 (permalink)
PoisonJello
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oh ya if it isn't scored that bad at all you might be able to just have it honed, then you don't need to go oversized
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