Spray start gas around the carb. Especialy att the Rubber intake boot. And see if it revs up, if it does, it shouldnt! U have an airleak
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Joined May 2016
138 Posts | 25+
Portugal
O also tryed spraying the intake boot on mine but not result . The boot looked old and brittle so I replaced it and my hanging idle went Away . mine was intermittent , some times it would hang sometimes not .
Joined Apr 2014
689 Posts | 252+
Chilliwack, BC, Canada
Remove the slide and clean it out, check for any rough surface on the slide and inside the carb. Yes when you turn the screw in it should drop and out will bring up idle but this should not give random idle problems as high idle to low idle and vise versa. It sounds like your slide is not returning and a broken spring and or weak spring can cause this. Checking for a air leak it is recommended to use propane such as a torch without flame and move it around to see if idle changes, starting fluid runs very hot when ignited and can cause damage if you have a large leak area. Do you see any gas running out of the vent tubes when running?
Joined Apr 2017
22 Posts | 8+
Australia
Yes I tried turning out. Eventually it started to die off. I then wound it in and it kept running with it all the way in.
Joined Apr 2017
22 Posts | 8+
Australia
I'm thinking it is a problem with the slide not returning back all the way. Which spring are you referring to? There is a lot of play where the arm joins to the slide, between the rollers and grooves. I guess the whole slide and arm assembly could do with being replaced. I have pulled everything off and carried out a very careful inspection, I'm confident that there is no air leak between the cylinder head, manifold and carby. There is no fuel coming out the vent tubes when running.
Joined Apr 2017
22 Posts | 8+
Australia
I've dropped the needle 2 clips positions, 2 from the bottom to 4 from the bottom. It's a lot better, but not perfect.
Jetting as follows.
Needle: stock?? Currently 4th clip from bottom
Main: 152
Slow: 45
Starter: 72
Leak: 105
Slow air jet: 100 (adjustable, 1 turn out)
Main air jet: 200
Jetting as follows.
Needle: stock?? Currently 4th clip from bottom
Main: 152
Slow: 45
Starter: 72
Leak: 105
Slow air jet: 100 (adjustable, 1 turn out)
Main air jet: 200
Joined Nov 2001
17K Posts | 773+
Ely, England
that main jet....look closely, it may be a 162 but 152 is borderline. I and a bunch of Suzuki DR lads from Colarado are the only ones to get down to 152MJ as I'm aware of?
try a 42PJ and have a 40 on stand by as i think it would like the 40 as well.
Taffy
try a 42PJ and have a 40 on stand by as i think it would like the 40 as well.
Taffy
Joined Apr 2017
22 Posts | 8+
Australia
It's back together in the carby now. I'm pretty sure I was 152. What should the float height be? It was parallel with the carby housing. I just assumed it was correct.
Also dropping the needle has seemed to have made a big difference. I will test ride on the weekend.
Joined Nov 2001
17K Posts | 773+
Ely, England
the rim to the peak on a float should be 9mm exactly but they say plus or minus 0.5mm.
to count needle clips you should hold it with the point down and then count from the blunt end downwards towards the tip. C1 is at the top and leanest and C7 is at the bottom and richest.
Taffy
to count needle clips you should hold it with the point down and then count from the blunt end downwards towards the tip. C1 is at the top and leanest and C7 is at the bottom and richest.
Taffy
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