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Messages - Gsa60

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1
Japanese Bikes / Re: Help with idle/compression on suzuki gt125.
« on: September 26, 2020, 06:05:16 PM »
Here is the pic of the plugs.
It is rotated, but the one on the top is for the right cylinder.
Cheers

2
Japanese Bikes / Re: Help with idle/compression on suzuki gt125.
« on: September 26, 2020, 06:04:03 PM »
Hi again,
So i finally got some newer parts.
I turns out that the needle that ataches to the float was too high.
Now, I am able to set the float height as 19.9mm
I managed to source also rest of parts with the same values as the spec.
I am trying to tune the carbs but seems to still run too rich at idle.
I even reduced the pilot air screws from 20 to 15. It is still not enough. The right spark plug is completely black.
What else am I missing?

3
Japanese Bikes / Re: Suzuki gt550 Smoking Issue
« on: July 17, 2020, 01:24:45 PM »

It can make sense that if the oil pump was set to feed too much oil, the engine and (more importantly) the mufler might be soaked with oil.
Perhaps you need to do a long ride so the muffler gets hotter in order to burn deposits.
Or you could try to clean somehow the the muffler.
I remember that on mine (gt125) they were soaked in sludge and was a bit smokey.


4
Japanese Bikes / Stuck gas vent on fuel cap
« on: July 15, 2020, 10:35:52 PM »
The gas cap on my suzuki gt125 has its vent valve stuck closed.
Anyone has any idea if the cap is serviceable?
I cannot find a good way to open it.
Thanks in advance

5
Japanese Bikes / Re: Help with idle/compression on suzuki gt125.
« on: February 01, 2020, 11:51:35 AM »
Hi everyone,
Exahusts still need to be decarbonized.
Perhaps floats are too high. The thing is I do not have a manual for the gt125. The only manual I find is for the gt185. There it states the height should be 19.9mm. I was checking that just now and even with the metal tang all the way closed i cannot go bellow the 20.5 mm of heigth.
Either something is up with the float or the values are different from bikes.
Cheers for your help on that.
I will keep you posted

6
Japanese Bikes / Re: Help with idle/compression on suzuki gt125.
« on: January 31, 2020, 03:39:45 PM »
Hi thanks Murdo,
So you mean my compression numbers of around 65psi is OK? I was reading people saying that it should be 120. So I was second guessing.
also you mean air leaks just after the carburetor? Ok, I'll try that also.
The mixture seems way too rich and no matter what I do it does not lean out.

7
Japanese Bikes / Re: Help with idle/compression on suzuki gt125.
« on: January 30, 2020, 08:29:03 AM »
Yes

8
Japanese Bikes / Help with idle/compression on suzuki gt125.
« on: January 29, 2020, 11:16:44 PM »
Hi everyone,
I rebuilt the engine of a 1976 suzuki gt125.
I am having some issues to having it to properly idle and the engine seems to have low torque.
I was doing a compression test and it is showing aroud 4.5 bar (around 65 psi) on both two cylinders.
I have read that the compression ratio of this engine is around 6.8. So should I have Around 6.8 bar? Btw its a twin cylinder two stroke.
I tested it with wide open trhottle and used the kick start untill the pressure stabilised.
Cheers

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