More than likely it will be kept to stock specs. I may opt to have some head work done on one of my older sets of heads. I have one NEW set of OEM heads going into the motor and I would like to have a spare set machined to match them as a backup. While the motor is there, I will more than likely be needing at least one of my cylinder sets to be replated before the start of next season.
Its gets expensive pretty quickly. I am quite happy with the power to weight ratio of the TZ250 as is. I can only expect it to run better just with the simple rebuild. I don't plan on doing much actual racing, so the extra engine mods are not going to be cost effective for me. If I were to race one, i would probably opt to purchase a newer version of the bike.
Ken
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2003 TL1000R #489 
1998 Valkyrie cruiser
No man's life, liberty, or property are safe while the legislature is in session....-Mark Twain
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