SOHC.co.uk Forums > CB500/550
CB550k1 US Import - UK registration
juitz:
Oh its fun doing this 😀
Ok, so please don't bash me too much but I'm trying to tune my bike with a 4into1 delkevic system and a steel dragon airbox. Unfortunately I found out too late that best option is to keep the stock airbox, but too late now.
Anyway, bench syncd the carbs using a 3mm drill bit (don't have 1/8"), aftermarket 42 slow and 110 main after reading some threads as a starting point. Kept original needle and emulsion tubes.
Moved the needles from 4th to 2nd from bottom as exhaust was coming out black so too rich?
Also installed a digital ignition system from 4into1.com - will keep the Hondaman system for the next build 😉
Have done static set of the difital ignition, and vac syncd bike using carb#1 as master.
Have tried 1/2 turn to 2 turns on mix screw without much success.
Bike struggles to idle below 1.5krpm. Revs crisply but a bit slow to return idle.
With current settings, bike won't idle below 2krpm when warm and with idle screw fully out.
Any suggestions for next steps?
Oddjob:
First off, those carbs aren't set by using any of the carbs as a master. Some are but not those. They should all show the same however.
2nd from bottom makes it richer not leaner, think about it, you lower the clip, which raises the needle in the slide, the higher the needle the more fuel you allow through. Put the clip in slot 3 and start from there.
Try turning the vac screws back out a few turns, each one, it may be that the slides are sitting too high and that's why the bike won't idle, setting the slides lower may cure that. Just make sure all the gauges are the same and alls good. If anything go too low with the slides and set the idle with the idle screw.
juitz:
Cheers, Oddjob, suggestions have got me to a semi decent running condition. Bit more to do though but at least it idles at just under 1.5krpm and starts straight away. 👍
I think I may have a problem and hope it's not a major one.
I've been adjusting the clutch position and moved the kickstart lever out of the way. This morning I tried the kickstart and worked straight away.
But just now after working on the clutch I tried again and heard a little click. Now the kickstart just spins.
Has something come undone / off and do I need to worry and break open the engine?
The lever spring returns the lever but it won't crank.the engine - I can only feel the return spring.
Checked the clutch and it looks to engage/disengage. The rear wheel spins in 1st gear but I can stop it with my foot when I disengage the clutch.The kickstart is supposed to work with the bike in N and clutch engaged.
commando1954:
Check out a guy on youtube called SPANNER RASH. He has a video of the process to register with DVLA.
Oddjob:
--- Quote from: juitz on May 13, 2023, 03:02:52 PM ---Cheers, Oddjob, suggestions have got me to a semi decent running condition. Bit more to do though but at least it idles at just under 1.5krpm and starts straight away. 👍
I think I may have a problem and hope it's not a major one.
I've been adjusting the clutch position and moved the kickstart lever out of the way. This morning I tried the kickstart and worked straight away.
But just now after working on the clutch I tried again and heard a little click. Now the kickstart just spins.
Has something come undone / off and do I need to worry and break open the engine?
The lever spring returns the lever but it won't crank.the engine - I can only feel the return spring.
Checked the clutch and it looks to engage/disengage. The rear wheel spins in 1st gear but I can stop it with my foot when I disengage the clutch.The kickstart is supposed to work with the bike in N and clutch engaged.
--- End quote ---
Circlip has come off Juitz,l as you suspected when I was telling Ted to make sure to fit a new one.
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