jax
New Member
Posts: 37
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Post by jax on Oct 5, 2015 17:56:45 GMT
This is after the motor is out of the bike and upside down. Remove all the bolts and take the bottom off the motor. This is with the bottom off the motor. Looking at the oil strainer and the crankshaft bearing holder and the transmission. Make sure you either take pictures or remember where everything is. Another Picture of the oil strainer and the crankshaft bearing holder from the other side
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Post by Guba on Oct 5, 2015 23:38:16 GMT
Originally posted by jax.
Oil strainer removed. Also remove the front chain guide it is below the bolt closes to the transmission, by pulling the shaft out to the right.
Had to clamp the case to the table to remove the bolts holding the crankshaft bearing holder. When you remove the holder you also have to remove the front chain guide.
This shows the crankshaft bearing holder removed. Looking toward the transmission you can see the front chain guide with the chain still attached.
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Post by Guba on Oct 5, 2015 23:52:30 GMT
Originally posted by jax.
I removed the crankshaft with the pistons still attached. measured the side play on the pistons with the crank still in place. in place. Service limit is 0.014 in. (0.35 mm)
crank out with connecting rods and pistons attached.
Remove the starter drive gear turning clockwise and pulling it off
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Post by Guba on Oct 6, 2015 0:01:20 GMT
Originally posted by jax.
you will need a shock driver to remove the 3 torx head bolts out of the starter clutch. You will also need to put the crank in a vice of some type and not put any marks on the crank. I have a vice that I use 3/4" wood pieces to clamp the crank with. It takes a #40 torx to fit in the bolts. I use my shock driver but I put a pipe wrench on it to loosen the torx bolts.
Be careful when you take the springs and rollers and plunger out of the from the starter clutch.
This is what you end up with after all the bolts and trouble. you can get all the new parts for the starter clutch at
www.hondapartspitstop.com/oemparts/a/hon/506c8e53f870023420a3d96e/crankshaft
They are the least expensive I have found, If you check out some different parts stores you might find them cheaper. when you put everything back together be sure to use a good assembly lube. I clean up the inside surface where the roller moves back and forth and put a good amount of assembly lube on the flat part and on the springs before it all goes back together.
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Post by Guba on Oct 6, 2015 0:06:26 GMT
Originally posted by jax.
Here is a picture of the old spring and the new spring and the new plunger and old one.
The bike only had 13,872 miles on it and the spring and the plunger were this much different.
If you are not mechanical be careful if you tackle this job. It can be a real nightmare if you let it.
Be sure to get a book the Honda service manual for the 86 or 87 CMX450 is your friend.
Some of the other manuals don't have all the information you need.
Good Luck!
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Post by Guba on Oct 6, 2015 0:11:37 GMT
jax I went and put all the threads into one thread. Thanks for pictures. It's hard to believe the starter clutches don't last that long. Hopefully, those are only the 450's that take short trips.
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Post by OldSchool on Oct 6, 2015 1:28:04 GMT
Good deal, thanks guys. Like I said that is a lot of work when a starter clutch goes out. I'm sure there is a lot of difference between cranking one or two times during a ride verses seven or eight times.
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