What kind of hp can you squeeze out of a 250?

I do not know how much I can get out of the LT 250 Suzuki, but we are getting ready to re-start testing and development on the 87-92 engine and find out.  We had to pull the plug on our LT 250 development in 1988 because we (and everybody else) could get a lot more power from the ATC/TRX 250R Honda engines.  I do not think there is as much potential in the 87 to 92 LT 250s as the Honda TRX engines.

At the time we pulled the plug on LT250 development, we were getting around 45 HP on the LT 250 and 50 HP to 55 HP on the ATC/TRX 250 Hondas.  I think the rules allowed 1.0mm over bore on the race engines.  Those power numbers do not sound like much by todays standards but these engines that we ran on the national circuits had to be 250s. The displacement was not 265 295, 310, 330, and up like the large number of 250 based recreational engines being built nowadays. 
 
After dynoing their TRX 250R Honda, I see too many disappointed faces of owners that just installed one of the new big bore cylinder and pipe kits from "The Walmart of the Honda ATV Industry".  It is sad to see that the majority of the new engine builders do not have the necessary understanding of how two-stroke engines and exhaust systems work and have to resort to adding a lot more displacement (big bores and stroker cranks) to be able to add more power to a customer’s engine. 

The CR 250 Honda shifter kart, micro sprint, micro midget engines that we built in the mid 1990s were in the 64 HP to 67 HP range on gas and the methanol CR 250s were 70 HP to 72 HP.  No over bores were allowed on the shifter kart engines and had to have a displacement of less than 250cc