Honda CT90 Engine Reassembly

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I have one 1971 CT90 where I was going to rebuild the clutch because the kickstarter just wasn't turning over the engine like it used too,  and I also had a Big Bore kit from DrATV that I wanted to install. My intent was to just do the top end and rebuild the clutch with new disks, but when I opened up the cases to rebuild the clutch pack I found a slick black slime in the bottom of the case.  I didn't like the idea that there could be black slime in the rest of the engine, so I decided to disassemble the entire engine to make sure I cleaned everything out.  Since I was tearing everything apart I thought I would document step by step how everything goes back together in this post in case others were interested in knowing what the inner workings of a CT90 engine look like. Links to Related Posts: My Honda CT90 Clutch and Headset Nut Tool Cut Away of a CT90 Engine - CT90 Engine Exposed! Repairing Damaged CT90 Spark Plug Threads Using a Time-Sert Thread Insert CT90 Cl...

Listing of Parts available on Amazon That Can be used on a CT90, CT200 & CT110

I have mixed feelings about Amazon as in some respects they are really taking over the world, but in the end they have become the simplest and quickest way for my family and I to get what we need. While Amazon may not always the cheapest place to buy things and some of their third party sellers are kind of questionable, I have generally always had a good experience purchasing item from Amazon.

Since I tend to make a lot of my purchases on Amazon, I have also started to buy much of what I need for a number of the Honda CT90 projects I am working on. While Amazon may not have many of the small unique CT90 parts like what is available on DrATV, they do have most if not all of the general parts you end up replacing on a CT90 project bike that has sat on the side of someones barn for the last twenty years.

Since it's not always easy to find things on Amazon, I decided to make a page on my blog at the link below where I have collected together a number of the CT90 related items people might use while rebuilding a bike.

  List of Honda CT90 Related Items on Amazon

I plan on updating this list as I find new items related to Honda CT90's.

When you purchase really anything off of Amazon, especially form third party sellers, you really need to look at the description and make sure it will work for your particular application.  So while I have provided this list of Amazon items, and I have used many of the items myself, I include this disclaimer that I am not making claim or endorsement and you really need to decide for yourself before purchasing any of these items.

There are certain items like carburetors, that I have not yet added to the list even though there are a significant number on Amazon that claim to be good fo a Honda CT90.   A number of these carburetors may work on a CT90, but from my limited experience are not always a direct replacement that you can bolt on and go.  When I do find one that seems like a direct replacement, I'll add it to the list.

I hope you find the list at the link above helpful.


Helpful Links (Shop Manuals, Wire Diagram, Model Information, etc.)

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