Hey guys,
I am really stumped at what has been going on with my 08 kfx 450r. I have had numerous people look at my quad including a kawi mechanics. My quad starts up great when its cold without any problems, It is not lacking any power and feels great when i ride. When i come off the track and shut it off and try and start it up again it will continue to turn over without starting unless i get lucky or let it cool down. I have checked my valve clearance and i am at .005 on my intake and .008 on my exhaust at top dead center. I replaced my decompression spring with the Factory oem part assuming it may have gotten weak. I check and adjusted my tps sensor between .62 & .64 vcd output. I have checked my battery and im getting 13.8 volts when running from my stator. When i spoke with the kawi mechanic he said even though im getting the correct reading on my tps it is most likely the cause and kawi's are know for bad tps sensors. I ended up going out and buying a new throttle body w/ injector and tps sensor. I double checked my output voltage and adjusted it to .63vdc ( Recommendation from the kawi mechanic Because i have the pcIII ) I had an extra ecu so i changed that out to see if that was the issue. It was not. this weekend i ran my quad at the track and got it nice and hot when i came off the track i tryed taking the pcIII out of the equation and i pluged it back into my stock ecu to see if that was causing the problem. After everything i have done i still cannot figure out the problem. The mechanic i was working with recommended me to get the power commander v with auto tune but its hard for me to justify buying another part that may help my problem when i know other people who race the kfx without the pcv and have no issues. Any advice would be great!
I am really stumped at what has been going on with my 08 kfx 450r. I have had numerous people look at my quad including a kawi mechanics. My quad starts up great when its cold without any problems, It is not lacking any power and feels great when i ride. When i come off the track and shut it off and try and start it up again it will continue to turn over without starting unless i get lucky or let it cool down. I have checked my valve clearance and i am at .005 on my intake and .008 on my exhaust at top dead center. I replaced my decompression spring with the Factory oem part assuming it may have gotten weak. I check and adjusted my tps sensor between .62 & .64 vcd output. I have checked my battery and im getting 13.8 volts when running from my stator. When i spoke with the kawi mechanic he said even though im getting the correct reading on my tps it is most likely the cause and kawi's are know for bad tps sensors. I ended up going out and buying a new throttle body w/ injector and tps sensor. I double checked my output voltage and adjusted it to .63vdc ( Recommendation from the kawi mechanic Because i have the pcIII ) I had an extra ecu so i changed that out to see if that was the issue. It was not. this weekend i ran my quad at the track and got it nice and hot when i came off the track i tryed taking the pcIII out of the equation and i pluged it back into my stock ecu to see if that was causing the problem. After everything i have done i still cannot figure out the problem. The mechanic i was working with recommended me to get the power commander v with auto tune but its hard for me to justify buying another part that may help my problem when i know other people who race the kfx without the pcv and have no issues. Any advice would be great!
