How to TAKE APART a Honda CT 90 Pt. 1
Flies still keep attacking me, but here's a video with all the combined info from the previous videos thus far
How’s it going, everybody!**
Today’s video is a full **Honda CT-90 teardown walkthrough**, combining everything I’ve done so far into **one streamlined, step-by-step flashback episode**. If you’re restoring a CT-90, parting one out, or prepping for a complete rebuild, this guide lays out every bolt, size, nut, spring, and sequence you’ll need.
My goal is simple: *make your teardown easier—and make my reassembly easier too.*
Let’s get into the weeds.
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🔧 *What This Video Covers*
Draining oil + gas
Removing the air filter, chain guard, carburetor
Foot pegs + frame bolts
Exhaust hardware + engine mount bolts
Chain & linkage removal
Battery case + electrical disassembly
Key switch, headlamp bucket, odometer cable
Full wiring harness unplugging
Rectifier removal
Alternator cover + gasket breakdown
Sub-transmission teardown
Crankcase components
Clutch disassembly
Tools, socket sizes, and bolt specs throughout
This teardown includes exact part numbers, bolt lengths, thread pitches, wrench sizes, and everything shown on camera. Perfect if you’re restoring a **CT-90 K-series**, working on a **1970s Honda trail bike**, or need a reference for reassembly.
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🧰 *Tools Used*
10mm, 12mm, 17mm socket heads
Flathead & Phillips screwdrivers
Snap-ring pliers
Impact driver
Needle-nose pliers
Homemade engine support block
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🕑 *Timestamps*
0:00 — Intro / Flashback Overview
0:21 — Step 1: Draining Oil
0:45 — Step 2: Draining Gas
1:08 — Step 3: Air Filter Removal
1:29 — Step 4–5: Chain Guard & Carburetor
1:48 — Step 6: Foot Peg Assembly
2:32 — Step 7–9: Exhaust & Frame Bolts
3:57 — Step 10: Chain Removal
4:34 — Step 11: Rear + Front Engine Mounts
5:35 — Engine Support Block Setup
6:00 — Battery Case + Electrical
7:00 — Key Socket + Wiring Harness
8:02 — Headlamp Bucket Disassembly
8:59 — Rectifier & Frame Brackets
10:11 — Alternator Cover + Gasket
11:05 — Sub-Transmission Breakdown
12:21 — Crankcase + Sprocket
13:26 — Oil Seals + Retainer Ball
14:13 — Clutch Assembly
15:18 — Clutch Hub Removal
16:06 — Final Thoughts & What’s Next
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🛠 *What’s Next in the Build*
Next episode:
Full engine internals
Handlebar + controls teardown
Full frame strip
Side-by-side rebuild of two CT-90s (yes, Noah’s Ark style)
Subscribe so you don’t miss it!
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🏍 *Follow the Build*
*IG:* @weirdyellowbike
More CT-90 restoration videos coming soon.
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