Speedy idle on 190 kit.... please help!
Posted: Fri Sep 02, 2011 6:06 pm
Afternoon chaps, I have finally started my SR190 GTE tuned kit with the following:
-RD400 rod
-AFflywheel,
-TS185 suzuki piston
-48mm matched AF clubman
-22mm new jettex GP200 carb run through regular airfilter set up.
The scooter runs fantastic on high revs, it has quite an amount of high power, but the problem is on the idle. Whenever I come to a stop the scooter just dies unless I revv it up or pitch the idle screw quite a bit. I started with a 42mm idle jet and there was no idle. Then moved on to a 45 (standard gp200) and there was no idle, still not enough as it would die constantly, then finally there was a speedy idle with a 47 jet, but still cannot get a "normal" idle. Its too speedy for my taste. Its almost like an airleak sound which makes me quite unhappy.
I called Sausage to ask about what he thought and his suggestion was that either I had an air leak somewhere or that the AFflywheel makes the tick over faster due to the lack of weight.
To figure out if it was an air leak, he suggested to spray break cleaner or some other high combustion product, on the intake area, the maghousing gasket and the u bend connection, to see if the scooter would speed and show a leak.
It does make sense so I tried to spray break cleaner on the mentioned areas when the scooter was running, and it didnt speed up at all. It kept idling at the same speed...
Some facts/data on it on it:
1-I have the ignition set at 19º
2- It needs just a tiny bit of choke to start when the engine is cold, then it floods really quick on tickover and dies.
3-Starts on first kick every time.
4-I have tried 2 carbs just to see if there was a problem with the carburettor, but they do the same speedy effect.
5-Choke kills the scooter instantly on idle, so it doesnt need more petrol.
I am a bit confused and dont know where to shoot at... Any ideas? Should I alter the ignition? Maybe I am using an exhaust that is too big for such a little carburettor? Would you reccomend to put a different exhaust on it? Maybe a bigger carb? Do you guys think that maybe if I should keep upjetting to lets say a 48 or a 50 jet would give me a decent idle?
Please help if you can, I would very much appreciate it
All the best,
Jaime
-RD400 rod
-AFflywheel,
-TS185 suzuki piston
-48mm matched AF clubman
-22mm new jettex GP200 carb run through regular airfilter set up.
The scooter runs fantastic on high revs, it has quite an amount of high power, but the problem is on the idle. Whenever I come to a stop the scooter just dies unless I revv it up or pitch the idle screw quite a bit. I started with a 42mm idle jet and there was no idle. Then moved on to a 45 (standard gp200) and there was no idle, still not enough as it would die constantly, then finally there was a speedy idle with a 47 jet, but still cannot get a "normal" idle. Its too speedy for my taste. Its almost like an airleak sound which makes me quite unhappy.
I called Sausage to ask about what he thought and his suggestion was that either I had an air leak somewhere or that the AFflywheel makes the tick over faster due to the lack of weight.
To figure out if it was an air leak, he suggested to spray break cleaner or some other high combustion product, on the intake area, the maghousing gasket and the u bend connection, to see if the scooter would speed and show a leak.
It does make sense so I tried to spray break cleaner on the mentioned areas when the scooter was running, and it didnt speed up at all. It kept idling at the same speed...
Some facts/data on it on it:
1-I have the ignition set at 19º
2- It needs just a tiny bit of choke to start when the engine is cold, then it floods really quick on tickover and dies.
3-Starts on first kick every time.
4-I have tried 2 carbs just to see if there was a problem with the carburettor, but they do the same speedy effect.
5-Choke kills the scooter instantly on idle, so it doesnt need more petrol.
I am a bit confused and dont know where to shoot at... Any ideas? Should I alter the ignition? Maybe I am using an exhaust that is too big for such a little carburettor? Would you reccomend to put a different exhaust on it? Maybe a bigger carb? Do you guys think that maybe if I should keep upjetting to lets say a 48 or a 50 jet would give me a decent idle?
Please help if you can, I would very much appreciate it
All the best,
Jaime
