Why did AC change the 400 engine in 03 was there a problem with them? Has anyone owned the old liquid cooled engine and the new oil&air? If so is there any power differance, less or more time in garage?

 

They changed to the new engine because Suzuki did. The new engine is cheaper because the oil cooler is cheaper than the radiator system and the 376 engine is suppose to be stronger than the 371 engine. I wouldn't know personally as I have never run the new engine against and old 400.

 

the old 400 (371) was putting out 22 horsepower and the new 400 (376) was putting out 25 hp which everyone preferred power over the better liquid cooling system. so they said back in 03. id rather have liquid cooling myself, so thats why i upgraded to a 500. i havent heard much of any problems with either one though.

 

any idea how many hp a 2000 500 is putting out?

 

before i bought my 2002 ac500 i checked the horsepower on all models. this is what the were in 2002:
according to my dealer who looked them up in the book.
250(246) - 12 hp
300(280) - 14 hp
400(371) - 22 hp
400(376) - 25 hp
500(492) - 30 hp
650--? wish i knew
i dont know if thats at the rear wheels or from the motor!!

 

oh i dont know what the dvx 400(398) is putting out either. if anyone find out, id like to know . thanks

 

im pretty sure those numbers are at the crank. I remember reading somewhere that the power output on a stock 650(633) twin was somewhere around 45 horsepower, no idea on the dvx though

 

thanks frndinalowplace! i was never sure about it.

 

thanks for the info red

 

So they changed to the oil&air cool engine for more power. I see nothing wrong with the temp. they have a very large oil cooler. I've never had mine warm enough for the fan to come on. Liquid cool would just be more to go wrong would it not?