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CB500K1. Cafe Racer to Original...sort of!
MarkCR750:
Let me know how you go on, I often have the "starting on three" issue, after about 30 seconds the 4th chimes in, or if I take no4 airfilter off and squirt carb cleaner into the brass balance pipes it starts immediately on 4, so definitely a carb issue, float heights are all good though, never been enough of an issue to warrant a deeper look for me though, but if you find the fix I'll do the same! 😄👍
AndyH:
--- Quote from: MarkCR750 on October 06, 2017, 09:48:43 AM ---Let me know how you go on, I often have the "starting on three" issue, after about 30 seconds the 4th chimes in, or if I take no4 airfilter off and squirt carb cleaner into the brass balance pipes it starts immediately on 4, so definitely a carb issue, float heights are all good though, never been enough of an issue to warrant a deeper look for me though, but if you find the fix I'll do the same! 😄👍
--- End quote ---
No probs mate! Following a suggestion from a US forum member, I drained all 4 carbs in turn with petcock on (actually an aux tank for synch work!) and found a fair few varnish type (very small) fragments in the capture.
I may be wrong but these bits may be contributing to the issue. Anyway, I've definitely decided to pull the rack and completely refurbish the carbs.
AndyH:
Removed the carbs and deracked them. Have removed all jets, emulsifiers etc. and given them a good bath in Simple Green in the ultrasonic cleaner. Amazing how much rubbish is removed with this method.
The emulsifiers were seriously clogged up but all other jets looked OK. I've completed carbs #1 and #2 and did have to adjust the float levels slightly. Carbs #3 and #4 tomorrow, then I'll do some further checks on float levels etc., before re-racking.
AndyH:
OK, carbs have been removed, de-racked, disassembled, cleaned, refurbished, reassembled, re-racked and now on the bench for some checks before returning to the bike.
All is good….so far!
AndyH:
Carb sync....almost there! 8)
https://youtu.be/ns_NmBi9Hl4
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