hay all I have a problem with my 08 brute 750 when I bought it it would only run about 30mph got it home tore it down and found a bad rod and crank installed a new crank, bearings and rod also while I had it apart I installed a set of 11 to 1 wiseco pistons got it all done and back in the brute starts good but still only runs 30mph so last week end I installed a new fuel pump and screen and still only runs 30 mph so ware do I look now maybe a Wiseco Fuel Controller or mds or something idk at this point I cant keep throwing parts and money at it any help would be greatly appreciated
thanks donnie

 

Have you checked into the clutches and also the belt?Dirt Cheap Kawasaki & Suzuki OEM Parts & Accessories – Cycle Parts Outlet

 

not yet looked good when I put it back together and it takes off good does not slip

 

Might want to make sure its getting spark to both cylinders. Might have a bad plug or wire going to one of them causing it to run on only one cylinder. That will really kill your power.

 

I will check it again has new plugs and both pipes seem hot but the rear dose not seem as hot as the front
thanks

 

I never thought maybe crank sensor it has power at idle clutch is not slipping belt is new went through the timing a couple of times to make sure it was right new plugs , starts good acts like it has a governor, but I did notice the rear cylinder don't seem to be as hot as the front maybe loosing fire. it has power to pull on and off the trailer but not enough to pull the front wheels off the ground

 

When you rebuilt the engine, are you sure you adjusted the valves correctly?

"Pick a cylinder. Remove the adjustment access covers. Rotate the crank in the normal direction of rotation and watch what the valves are doing; watch for the exhaust valves to open and then close, then the intake valves will open and then close. Once the intake valves have closed, start watching the flywheel for the TF or TR (depending on what cylinder you are doing) mark to come around to the viewing port (about 1/2 turn of the crank). Adjust all the valves on that cylinder.
Now do the same process for the other cylinder."

 

thanks will give it a try

 

Check the lobes on the cam for wear, too.

 

The Kawie cam lobes rarley wear out, unlike the older polaris models....doubt that's anything to do with the problem...