2003 400ex
powermadd star series handguards w/wrap-powermadd gauntlets-elka stage 3 front shock-tusk nerfs- 11:1 piston-full fmf-gtt xc link-oury grips-909 bars-precision anti-vibe clamp-K&N filter-ccp steering stabalizer-oversized oil tank
I think we're getting closer to the timing being the culprit. On the chance that maybe the battery wasn't making full spark, I hooked a jumper box up to it. No differene. Then I took the plug out, sprayed some starter fluid in the cylinder, put the plug back in and left the jumper box hooked up while I tried to start it. Still nothing. Didn't even make an attempt at starting. The starter just sounds like it's free spinning. I have an '07 400 I keep parked right behind his. Just for a comparison I fired mine up. The starter sounds like it's trying much harder to turn the engine over. I guess checking the timing is the next thing in the list
Given how it sounds I would be willing to be it is a snapped timing chain
2003 400ex
powermadd star series handguards w/wrap-powermadd gauntlets-elka stage 3 front shock-tusk nerfs- 11:1 piston-full fmf-gtt xc link-oury grips-909 bars-precision anti-vibe clamp-K&N filter-ccp steering stabalizer-oversized oil tank
It could be the cam decompression, If it sounds like it wants to start when you keep pumping the throttle then that's your problem. I had that happen to my 400EX.
87 TRX310R
87 TRX370R
85 YZ125 Resto
85 YZ80 Resto
85 ATC70
00 TRX416EX
Your correct they would not move. I didn't know you ever pulled the valve cover plugs
2003 400ex
powermadd star series handguards w/wrap-powermadd gauntlets-elka stage 3 front shock-tusk nerfs- 11:1 piston-full fmf-gtt xc link-oury grips-909 bars-precision anti-vibe clamp-K&N filter-ccp steering stabalizer-oversized oil tank
We'll make sure you set the engine to TDC before you pull the valve cover. Otherwise you can strip bolts in the head.
2003 400ex
powermadd star series handguards w/wrap-powermadd gauntlets-elka stage 3 front shock-tusk nerfs- 11:1 piston-full fmf-gtt xc link-oury grips-909 bars-precision anti-vibe clamp-K&N filter-ccp steering stabalizer-oversized oil tank