Ok I got a question my 2004 2000vn it runs great one minute the next to loads...

Ok I got a question my 2004 2000vn it runs great one minute the next to loads up and starts to puck out with a top speed of 80 I did sparkplugs but it's still messing up any idea

11 comments
  • I had the same /maybe worse, topped out at 67 turns out my issue was a carbon buildup

  • So seafoam would be good for it may be

  • Possibly, can't hurt to try it

  • Thanks for the idea how did you fix yours

  • Unfortunately I didn't try the seafoam after replacing plugs and fuel pump, took it to the dealership. They couldn't find anything wrong, so they flushed the fuel system and put in some Yamaha additive with fresh gas

  • Ok thanks

  • 2-3 oz of sea foam to a full tank of gas.

  • How many miles

  • 52000

  • Ok do you have a TFI on it maybe a power commander 3

  • No