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I bought this CB550K3 at Auction
robvangulik:
--- Quote --- retimed it, cylinders 3 and 4 were well out.
--- End quote ---
How do you do that? It would rather be 1 and 4 or 2 and 3.....
gbjeppm:
--- Quote from: robvangulik on October 25, 2020, 11:23:36 PM ---
--- Quote --- retimed it, cylinders 3 and 4 were well out.
--- End quote ---
How do you do that? It would rather be 1 and 4 or 2 and 3.....
--- End quote ---
Oops, well spotted, i meant 2 and 3, now corrected.
robvangulik:
;D
gbjeppm:
I have managed to make more progress.
First off I needed to sort out the exhaust, as Muffler No 3 had a couple of holes in it. All of the others were fine, and it seemed a shame to junk it.
I managed to find a local welder who after looking at it said that he could weld in polished stainless, and make it structurally sound. As the holes were underneath, that was fine by me.
The result was much better than I imagined.
So now the exhaust was sorted out, my new seat arrived from Vietnam, and it was ready to ride.
gbjeppm:
First ride was underwhelming to say the least.
In neutral, the bike was running nicely, idling at 1200, and stable.
Under load, the minute I hit 3500 revs it started to stutter and backfire, it felt like fuel starvation.
I read lots of forum posts, that the bike needs to run a bit rich etc, but no amount of playing with the mixture and idle helped much.
I was trying to narrow down the issue.
I had new plugs, all the leads tested good. I had cleaned the carb, I knew I had fuel, the timing was correct, so i was fairly convinced that the condensers were the problem,
Two new condensers this morning, and wow its a different bike. Idle is better, no stumbling or backfiring all through the rev range. Finally I can ride it without thinking about breaking down :)
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