SOHC.co.uk Forums > CB350/400
Carburettor throttle return spring
taysidedragon:
--- Quote from: Nurse Julie on May 18, 2021, 12:51:24 PM ---I've fitted a less tight throttle spring on my 550/4 Mongrel because I found it a bit hard work after a few hours riding, it works a treat. I had to retain a bit of tension though as I don't have a return throttle cable fitted to this bike but this snaps back just perfect.
--- End quote ---
Good to know. Thanks.
Tricky Micky, My cables are new and move freely when disconnected.
billywingnut:
I think you really need that throttle return cable for safety reasons, there are four carbs if one should stick you would be in trouble, this strong spring ensures the engine returns to the correct idle speed when snapped closed, the old cables ( 40 years old) on my bike would occasionally leave the engine running slightly faster than the 1200 rpm recommended.
allankelly1:
--- Quote from: Nurse Julie on May 18, 2021, 12:51:24 PM ---I've fitted a less tight throttle spring on my 550/4 Mongrel because I found it a bit hard work after a few hours riding, it works a treat. I had to retain a bit of tension though as I don't have a return throttle cable fitted to this bike but this snaps back just perfect.
--- End quote ---
Hi Julie
May I ask where did you source your spring from please
Would like to use a lighter spring on my CB400F as starting to do longer rides out +100 miles so would like to lighten up the throttle a bit if possible
Many thanks Al
Sent from my iPhone using Tapatalk
Nurse Julie:
--- Quote from: allankelly1 on June 01, 2022, 11:53:06 AM ---
--- Quote from: Nurse Julie on May 18, 2021, 12:51:24 PM ---I've fitted a less tight throttle spring on my 550/4 Mongrel because I found it a bit hard work after a few hours riding, it works a treat. I had to retain a bit of tension though as I don't have a return throttle cable fitted to this bike but this snaps back just perfect.
--- End quote ---
Hi Julie
May I ask where did you source your spring from please
Would like to use a lighter spring on my CB400F as starting to do longer rides out +100 miles so would like to lighten up the throttle a bit if possible
Many thanks Al
Sent from my iPhone using Tapatalk
--- End quote ---
Hi Al
I sourced it from a spring parts bin in the workshop 😂😂😂😂 I've no idea what model Honda Four it came from, all I can remember is that the spring tension was a little less than the one I had fitted and overall it was a few mm longer.
allankelly1:
--- Quote from: Nurse Julie on June 01, 2022, 01:40:12 PM ---
--- Quote from: allankelly1 on June 01, 2022, 11:53:06 AM ---
--- Quote from: Nurse Julie on May 18, 2021, 12:51:24 PM ---I've fitted a less tight throttle spring on my 550/4 Mongrel because I found it a bit hard work after a few hours riding, it works a treat. I had to retain a bit of tension though as I don't have a return throttle cable fitted to this bike but this snaps back just perfect.
--- End quote ---
Hi Julie
May I ask where did you source your spring from please
Would like to use a lighter spring on my CB400F as starting to do longer rides out +100 miles so would like to lighten up the throttle a bit if possible
Many thanks Al
Sent from my iPhone using Tapatalk
--- End quote ---
Hi Al
I sourced it from a spring parts bin in the workshop I've no idea what model Honda Four it came from, all I can remember is that the spring tension was a little less than the one I had fitted and overall it was a few mm longer.
--- End quote ---
Ok thanks for the reply
I will measure mine and see what is out there
Thanks again Al
Sent from my iPhone using Tapatalk
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