Tom here are a couple hints I learned from a few KLR master mechanics.
- The water pump shaft is driven from the left side of the engine. Please don't damage or break the shaft.
- The water pump impeller has an O-ring that seals on the impeller shaft. Please do not scar, scrape, or cut the O-ring. When removing the impeller rotate it CCW (thread direction) and do not pull it off. When installing the impeller rotate it CW (thread direction) and do not push it on. You can use a dab of coolant to lubricate the O-ring.
- Take the time to look at the manual before removing and reinstalling the water pump.
Hope this helps.
2005 KLR 685
2015 Yamaha Super Tenere ES, 5/23/2015
2012 Yamaha Super Tenere; Purchased 7/30/2011; Sold 5/23/2015