SOHC.co.uk Forums > CB500/550

Slow jets

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basketcase:
Been for a run on the K3 today....first time that it`s run for ages. Didn`t go too well :( The revs were all over the place, stop, adjust to about 1200, pull away and they were back up to 4000 when I pulled in the clutch. Uphill was a struggle, having to change down a couple of cogs. Also there was fuel peeing out of one of the overflow tubes when I came back. The carbs were stripped, cleaned and balanced last year. I didn`t touch the jets, just left the whole lot soaking in carb cleaner and redex for a couple of weeks. Could it be that the slow running jets are still blocked? If so am I better off installing new ones or do I attempt to clean out the old ones? Has anyone bought from sisusconinc on ebay?
Sorry for the ammount of questions but carbs are not my favourite things to play with, I sold the last one because I couldn`t get it to run right >:(. Also all of my manuals and literature are still in storage so I`d` be doing this `blind`.
Cheers in advance basketcase.

Bryanj:
You can clean the originals but you have to get them out as they are a press fit, grip with mole grips but not too tight or they will deform then twist and pull at the same time. Re-Fit with a tap from a copper hammer.

Sirius i have bought from and they are goos but get yours out first and  try cleaning them

mickwinf:
I had similar problems with my k3,the slow jets were blocked solid and defied all attempts to clear, so i ordered some new ones from Sirius and found them very good to deal with.Also check the float needles as i had problems with fuel flow, turned out to be a faulty needle.Regards Mick

K2-K6:
If you need to leave it for anything more than about 4 weeks it seems that the carbs need to be dry to avoid the jets getting blocked.

Petrol didn't do this in the past, but it does now so if you are going to lay it up for a while then run it with the fuel swicthed off until it's dry.

It appears to affect the smallest jets quite quickly now and is a real pain.

basketcase:
Four weeks!!!!! Ooops! More like 4-5 months since it last had a good run, what with the house move and work. Funny that the old Matchless has stood for the same time and that kicked in on the second kick and ran as sweet as anything:) (apart from spitting it`s chain off after a mile or so) but that was probably `operator error`.

So it looks like more split knuckles, trapped fingers, swearing and all of that....just to get the carbs off!!

Thanks guys, always there when needed. basketcase.

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