This is the battery I have. Some off brand shaZam!

https://www.google.co.il/url?sa=t&source=web&rct=j&url=https://www.amazon.com/Power-Sonic-CB10L-B2-Conventional-Powersport-Battery/dp/B00I1KMJS2&ved=2ahUKEwjk2aS7h4zbAhVJJcAKHa64Dd8QFjAAegQICBAB&usg=AOvVaw0MsqxK985S1_836cj0Vj-s

So I went to go pick up my bike today from the second mechanic. Supposedly hes reputable.

He said something similar. Checked plugs, and what not. Said that what he found was that one cylinder is not fuctional. When he jumped the bike, only one was actually working.  Said that it's likely a cylinder head probelm and that it will be quite some work to look into it.

What can I provide you guys to help diagnose. I really hope ill be able to get this thing up and running again.

That's not a very good battery, only 160 CCA, the standard battery puts out 225 and you can get a quality AGM that will put out 310, which is safer for cold weather.

I guess you need to diagnose if you're getting a spark to the cylinder that is not firing. But the bike should still work OK even on one cylinder up until about 4000 rpm when it won't have any power. Ask me how I know, no don't bother I'll tell you, was about to check the plugs, pulled the lead off the plug but then got distracted and forgot about it. I didn't even know there was a problem till I was riding it a short way.

But surely the 'mechanic' has checked you're getting a spark.

Quote from: user11235813 on May 16, 2018, 11:08:24 PM
That's not a very good battery, only 160 CCA, the standard battery puts out 225 and you can get a quality AGM that will put out 310, which is safer for cold weather.

I guess you need to diagnose if you're getting a spark to the cylinder that is not firing. But the bike should still work OK even on one cylinder up until about 4000 rpm when it won't have any power. Ask me how I know, no don't bother I'll tell you, was about to check the plugs, pulled the lead off the plug but then got distracted and forgot about it. I didn't even know there was a problem till I was riding it a short way.

But surely the 'mechanic' has checked you're getting a spark.

So the story goes, i had new jets and lunchbox inserted. So the bike currently (when i do get it running) is running better than ever before!!

Thats why it is a bit strange that both shops said that one cylinder isnt firing. The bike goes up to 140-150 indicated currently (again, if i jump start it). Which faster than it ever did for me in the past. Doesn't that mean theres no way that one cylinder isn't working?

Welp, it looks like your only problem is a dodgy battery. This looks pretty good

https://www.ebay.com/itm/AGM-BATTERY-Fits-SUZUKI-GS550-GS550E-GS550L-GS550M-GS550T-1977-1982/273092228691

325 CCA instead of the more usual 170 like the motobatt, I'd definitely go for this and you'll still have change from a McGarrett

Quote from: user11235813 on May 17, 2018, 01:39:46 AM
Welp, it looks like your only problem is a dodgy battery. This looks pretty good

https://www.ebay.com/itm/AGM-BATTERY-Fits-SUZUKI-GS550-GS550E-GS550L-GS550M-GS550T-1977-1982/273092228691

325 CCA instead of the more usual 170 like the motobatt, I'd definitely go for this and you'll still have change from a McGarrett

That would be awesome. it doesn't ship internationally, so i'll have to find one locally.

Quote from: user11235813 on May 16, 2018, 11:08:24 PM
That's not a very good battery, only 160 CCA, the standard battery puts out 225 and you can get a quality AGM that will put out 310, which is safer for cold weather.

I guess you need to diagnose if you're getting a spark to the cylinder that is not firing. But the bike should still work OK even on one cylinder up until about 4000 rpm when it won't have any power. Ask me how I know, no don't bother I'll tell you, was about to check the plugs, pulled the lead off the plug but then got distracted and forgot about it. I didn't even know there was a problem till I was riding it a short way.

But surely the 'mechanic' has checked you're getting a spark.

By the way, its very hot where i live. On average 20-30 degrees celsius (68-86 fahrenheit)

Where do you reside? Does the Cº indicate Australia by any chance? If so then you'll want the SSB powersport. I reckon it's worthwhile hunting out something with more CCA in the 300 range just because it's probably a better build, or at least 220.

Quote from: user11235813 on May 17, 2018, 03:23:41 AM
Where do you reside? Does the Cº indicate Australia by any chance? If so then you'll want the SSB powersport. I reckon it's worthwhile hunting out something with more CCA in the 300 range just because it's probably a better build, or at least 220.

I am in Tel Aviv.

New jets and lunch box ? did you do pipe as well ?
I almost think your secondary problem is one where its sucking air which usually is worst at idle.
Get the battery solved, a bike that makes 150kph is far from running on 1 cyl.
Cool.
Buddha.