motor issue

Fuel pressure should be steady around 51 psi IIRC. I'd also check cooling or electrical charging issues.

And BTW, in most people's books, that's a "real" bike.

Dirt in the tank?

thanks

I have cleaned the tank when I changed fuel pump. what I forgot to mention was after changing pump, I ran bike at the house with fuel pressure gauge for 1.5 hours with no issues thru all rpms & loads. we rode for several hours fine shut off for lunch & it didn't seem right after that, also I can shut it off & start rite back up & it run fine for about 15 min.

Sounds similar to a problem I have with my xxc. I was sure it was a fuel problem but it held a steady 51. I tried to get any codes but no active codes. I took it to my dealer because budds will pull any stored codes. They got 4 electrical codes. High today voltage low map voltage and a low voltage in both cylinders. I left it there being I'm still under warranty. I would take it to a dealer to see if you have any codes you can't read. It will save time


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thanks for the info I've found bad diff seal & haven't put it back together to take it. if you could let me know what they found I would appreciate it. I have been trying to find a fuel pressure regulator to be on safe side but no luck

The fuel pressure regulator is in tank, adding an additional one in line would serve no purpose; I know you said you ran it for 1 1/2 hrs and it was fine, but did you mean ran fine or that fuel pressure maintained 51psi throughout? Have you done leak down test and compression test? Maybe as bike gets hot your loosing ring seal? Check your vent tubes aren't clogged up, try running without gas cap( you can cut a piece of window scream and elastic band it over hole to prevent debris from entering tank) ; check for loose battery and reg connections a loose connection has caused this symptom before; also check your regulator.

thanks

I had fuel pressure gauge on the whole 1.5 hours & it did stay at 51 psi no matter what rpm or load. compression was 135 & 142. while it was messing up I took fuel cap off & found no difference what so ever. it did get better after pump & I wanted to change regulator to take that possibility out. found several places to buy from but you have to purchase a min of 100 or more depending on which site. took my battery & put it in another 800 outlander which he is still using & not having problems. vent lines were open but had hole about 4 in from top so I installed all new & tested it from the tank.

I would get set up to monitor system Voltage & head out for a ride. Could be once its hot the Voltage swings are too much to keep relays & regulators happy. A laser temp gauge is handy as heck too. Assuming fuel pressure & supply is consistent.

voltage

thanks . still haven't found fuel pressure regulator & trying to remove pinion nut to change bearings while it's apart. do I run a meter off the battery for best results