Alright well i beleive this should be the right place if not sorry.

i got a 2005 john deere 650 , and the speedo says fail on it, this is after someone tried boosting it... so i need a new voltage regulator?

also the spark plug wires came right out of the plug, so i need all new harness for that part of it?

and another quick question, is there boring kits for this engine? what size can i wrap it up to?

 

Yes I'd say get a new wiring harness and all your problems will be fixed...

 

you should have gone RED