How to Synchronize the Keihin Slide Carburetors on Your Honda CB175 / CL175 / SL175 / CB200 / CL200

Carburetor Assembly Part 1:    • How to Assemble the CB175 / CL175 / S...  
Carburetor Assembly Part 2:    • How to Assemble the CB175 / CL175 / S...  
Carburetor Disassembly Video:    • How to Disassemble the Keihin Slide C...  

When it comes to a bike with multiple carburetors, making sure the carbs are synchronized correctly is key to your bike running at peak performance. How do you sync your carbs, though? I’m sure you’ve heard graybeards and gearheads talking about vacuum sticks and gauges and all kinds of rigamarole when trying to get their carbs all on the same page. Thankfully, you don’t have to worry about any that for two reasons—one, syncing the carbs on your Honda CB175 / CL175 / SL175 / CB200 / CL200 is an extremely simple process that doesn’t involve vacuum, and two, Brenden is here to show you how it’s done!

In this video, Brenden gives us the lowdown on how to sync the carbs on your CB175 or CB200-series bikes. He goes into detail about the two kinds of syncing—idle sync and progressive sync—what, exactly, the screws and adjusters do, and the importance of a good throttle cable. You’ll also get solid information about rubber locking boots and why they’re so important to a proper sync.

This video covers the following topics:
- Information about the idle speed screw.
- How to set idle synchronization.
- How to set progressive synchronization.
- Proper throttle cable routing.
- Setting the upper throttle cable tension and throttle cable free play.

With your carbs properly cleaned, rebuilt, and synced, your Honda CB175 / CL175 / SL175 / CB200 / CL200 should run as good or better than it did when it left the factory. Also, we should note that this syncing method works on some of Honda’s older bikes, too. While the process isn’t identical, the method we present here will work on other bikes that Honda made around the same time that the CB175 and CB200 series bikes were in production. These include the 305 / 250 Superhawks, CB77 / CL77, SL350 K1 / K2, and CB160 / CL160. Follow along with us and subscribe for more valuable motorcycle maintenance content, and let us know your thoughts and questions in the comments below.

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Purchase a new float for your CB175 / CL175 / SL175 / CB200 / CL200 carburetor here: https://www.common-motor.com/honda-br...
Purchase a new throttle cable here: https://www.common-motor.com/honda-cb...

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Need help with your vintage Honda? Attend the CMC Repair Academy and watch the full playlist of repair videos for your motorcycle:

   • CB175/CL175/SL175/CB200/CL200  
   • CB350/CL350/SL350  
   • CB360/CL360  
   • CB450/CL450/CB500t  
   • CB550 / CB500F  
   • CB750  
   • CB350F / CB400F  
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Contents of this video:
00:00 - Introduction
00:40 - Compatible motorcycles
01:55 - What are we trying to accomplish?
02:48 - What to know before getting started
03:43 - The idle speed screw sync details
05:41 - Setting the idle speed screw sync
06:42 - Importance of the idle speed screw sync
08:17 - Setting the progressive sync
09:08 - Throttle cable details
09:49 - Preferred throttle cable routing
10:59 - Setting the progressive sync
14:59 - The importance of the progressive sync
15:54 - Adjusting the throttle cable free play
17:53 - Summary
18:15 - Wrap-up