Join Date: Dec 2009
Location: central mississippi 39180
well the majority of the big prowlers with the single cylinder motors just dont go fast. the cat singles are made to make torque, and they do that wonderfully. the singles peak HP is right about 5700 and then it falls off rapidly. the singles usually rev to 6600-7000 depending on which CDI you have, and honestly most of the singles make less power at 6500RPM than they do at 5,000RPM so when you really get up in the revs the motor is just dying. it really aint making enough power to rev all the way to teh rev limiter with a 1400lb bike on its back. even after the top speed work i do, the motor may or not be able to pull the speeds. my 700H1 after the stage 5+ machining to the clutches, has the ability to hit 91mph, thats what the speed the tires would be turning when the bike hit the 7,000RPM rev limiter, however on the ground, the motor would only pull me up to about 79mph-6300RPM and just stalled out. it wouldn't go any faster cause the motor would not rev any more. the engine had reached its maximum output. the gearing was there to run faster, but the motor would not continue to rev to the rev limiter so i just could not go any faster. classic case of more power needed. a high winding cam would do alot of difference, and possibly some bolt ons but i aint going in the motor just to pick up some more top speed i'm fine where its at. i only did that run as a test, never will run that fast again.