hi there any1 know much about these big singles? ive just bought a 93 dr650rs, and although it sat garaged for 4 years it started n went no problem at all...... i then treated it to dynojet 160 main jet and unplugged the side ov the airbox, the bike sounded KRAZY loud n throttle response increased TENFOLD!!!!!!!!! well recommended!! however..... when i put the airbox cover back on the bike cut out immediately and now wont spark..... what have i done? are these things prone to cdi failure, rectifier etc? tried new spark plugs and all wiring connectors to no avail so now im thinking coils but still aint sure......