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tm45hsr
10-20-2013, 08:40 PM
This is not a stock bore & stroke motor.
HairyJR
10-23-2013, 07:28 PM
One might believe by your user name it has a Mikuni HSR45 carb on that large motor, 68 hp - 47 torque, what size is the motor and what size jets? I have a 45 on my XR713L.

"HJ" :confused:
tm45hsr
10-23-2013, 09:39 PM
motor size is 770cc, with dual HSR-tm48 carbs. was dual HSR-tm45 on a 730cc motor.
jcs003
11-05-2013, 04:04 AM
i would expect 100 hp out of a motor that size. guys are running 363 cc on their MX trx250r that put out those same numbers @ just over 300 lbs wet.

john
tm45hsr
11-05-2013, 08:48 PM
Is that 100hp at the crank or the rear wheels? Please can you post a dyno sheet of that. that is huge from a 363cc
jcs003
11-08-2013, 03:57 PM
look at these numbers. these are duneable/mx type power too.

http://www.ledperformanceengines.com/trx250.htm

john