Welcome to the forum Definitely some sun damage, a lot of time humidity will cause those to oxidize like that, depending on area of the country you are incircuit  About 75% of the circuit boards I see have some level of oxidation to the screws even if they working ok Does the card power up at all? LEDS all function etc?  I will need a few more details about what all you have going on with it I have sent my direct contact information to your message box as well -AKATV  

Shade/sdec40 That speedometer is definately for an 98-01 450S The LCD screen is the same for the 98-04 450S models even thru the addition the the extra LED for the 4x4, the circuit cards are different, but the displays will swap over The black looking ink type spots are a known issue, more particular to the 450S model screen for some reason It is not repairable and the LCD must be replaced sdec40 said he thought he was able to repair his black spot before it cracked, I have not seen, or been able to replicate any successful long term repair of this kind of damage. -AKATV

Has anyone found a remedy for the notorious fourtrax shutdown problem?It will start back up fine but instantly shuts off when put in gear.

Pulled the top end off and the timing jumped a couple teeth in the gear, surprised it actually even ran. You can see in the one pic that the exhaust valves were hitting the piston, I’ll disassemble those this week and inspect to see if they are damaged. The tensioner appears to be the issue here’s a video as well. Is the cam supposed to have that much flop and is the chain supposed to be that loose even with a bad tensioner?  For reference in the videos I had not taken the tensioner out yet. Piston clearance is nice and tight. So do I need to replace the chain and guide?  I think I might just move to correct timing and put a new tensioner on and start there. Thoughts from anyone following along?   IMG_7531.mov IMG_7533.mov

Ron said he didn't think that mattered if I was only needing the LCD screen the ES models use the circuitry to do that but the screens are apparently the same. I'll double check that with him, to be sure