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KX500 Crank Gear Spur for impeller/water pump. Question
Posted: Wed Nov 29, 2017 1:04 pm
by Markee757
Tearing my motor down and found the gear on the crankshaft is chipped and cracked. At first I thought they cut the gear on the crank! But apparently it seems to be a press/interference fit? Correct?
Re: KX500 Crank Gear Spur for impeller/water pump. Question
Posted: Wed Nov 29, 2017 3:30 pm
by Sandblaster
Yes, it is lightly pressed in.
59051-1128 is the part number.
I don't have the size of the shaft that goes into the crank.
So, if it breaks off while removing, just order a new one (If you haven't already) and when it comes in measure it.
Then get a drill that is a little smaller and go for it
Let us know the results..
Re: KX500 Crank Gear Spur for impeller/water pump. Question
Posted: Fri Dec 01, 2017 1:11 pm
by Markee757
I'm going to weld a nut on, heat the crank a little and try to slide hammer it out.
Re: KX500 Crank Gear Spur for impeller/water pump. Question
Posted: Fri Dec 01, 2017 3:42 pm
by Sandblaster
That will work as well...
There are always lots of ways to repair

Re: KX500 Crank Gear Spur for impeller/water pump. Question
Posted: Sun Dec 03, 2017 1:06 pm
by Markee757
Re: KX500 Crank Gear Spur for impeller/water pump. Question
Posted: Sun Dec 03, 2017 3:33 pm
by Sandblaster
Very nice.
You can certainly weld a lot better then me.
Most of the time guys break them off which is why they need to replace them
Great job!