RB Swab or RB Mod? 2005 to 2011

[AZRickD]

A special situation.

Having taken possession of adv_rider's 2011 EC250 Race, I am (this morning), doing a squish measurement and such.

My '05 had both a the squish (about 1.05 mm) and the carb mod (old Air Striker 1) completed with excellent and good results respectively.

I am hoping that my old modded head will give me a good squish on the 2011 and then I can send in the stocker into RB to make me a head that is potent at 10,000 feet if I ever visit Colorado. I told RB that my riding in Arizona is usually no lower than 2,000 feet and often at 3,500 for a few races, and even at 6,000 and 9,000 when heading to Flagstaff in the summer. Temps are around 50F in the winter in Phoenix, 95F in the summer (at sun up) at around 85F in Flagstaff at mid-day. The best pump gas we get in Arizona is 91 octane.

So, the head issue is fairly simple. BTW, my modded '05 with about 60 hours on the top-end compression tested out to be about 25 PSI higher than the stock 2011 with 13 hours. More later.

The carby, on the other hand (SmartCarb and Lectron aside) -- I have been told that the Air Striker 2 is a better carb than the AS1. Fine, as it goes. I am wondering whether I should keep the un-modded AS2, swap my modded AS1, or get the AS2 modded by RB.

Thoughts?

Rick