Andi
04-20-2007, 09:09 PM
I purchased a few different sizes of main jets from Bruce at EJ Cycles, because I just couldn't find the right setting for my carburetor.
I changed the needle up and down and played around with the adjustment screw, but nothing worked. It either ran good at low rpm or at high rpm no happy medium.
My LF200GY-5 came with the Keihin - Sheng Way 30mm carb and a 98 Main Jet Size. I now switched to a 105 Main Jet and have taken it for a good few rides. It runs alot better now almost perfect, I checked the sparkplug and for the first time it had the proper appearance, light brown inside, but maybe a little too much black sud around the outer edge by the threading.
I'm still getting a slight pinging, but only when the engine is well hot. It seems to happen around 4000 rpm or less, when I'm opening up the throttle to get the bike to accelerate, used to be really bad with the smaller jet.
So based on that analysis I figured I might just want to try the 110 Main Jet (or try a higher octane?). I also find it get's really hot, more than it should although not quiet as bad as before (maybe I'm just paranoid though). I was wondering if I should maybe do the exhaust mod I read about on the forum, might allow it to run a little cooler also.
Anybody have any other suggestions?
The vibration has gotten alot worse too, can really notice it after a long ride. I think part of it is the rear fender and license plate combo as it is an add on extending from the end of the frame. I'm probably going to run two braces from the license plate bolts to a bolting point in front of the rear end of the frame, to act like a gusset. I figured I will use some 3/8" or 1/2" OD Stainless Tubing, flatten the ends in a vise and the drill a hole into the flattened ends, kind of like a truck mirror bracket.
The other source I think is from the skid plate, might look at changing the rubber bumbers and maybe even add some by the front underside of the engine. There is nothing to prevent vibration between the mounting point in front and the rubber bumpers and mounting point in the rear. I figured if I get some small rubber bumpers with threaded hole on one end, I'll match up the height to the space between the engine and skid plate to then bolt the rubbers onto the skid plate.
What do you all think??
Andi
I changed the needle up and down and played around with the adjustment screw, but nothing worked. It either ran good at low rpm or at high rpm no happy medium.
My LF200GY-5 came with the Keihin - Sheng Way 30mm carb and a 98 Main Jet Size. I now switched to a 105 Main Jet and have taken it for a good few rides. It runs alot better now almost perfect, I checked the sparkplug and for the first time it had the proper appearance, light brown inside, but maybe a little too much black sud around the outer edge by the threading.
I'm still getting a slight pinging, but only when the engine is well hot. It seems to happen around 4000 rpm or less, when I'm opening up the throttle to get the bike to accelerate, used to be really bad with the smaller jet.
So based on that analysis I figured I might just want to try the 110 Main Jet (or try a higher octane?). I also find it get's really hot, more than it should although not quiet as bad as before (maybe I'm just paranoid though). I was wondering if I should maybe do the exhaust mod I read about on the forum, might allow it to run a little cooler also.
Anybody have any other suggestions?
The vibration has gotten alot worse too, can really notice it after a long ride. I think part of it is the rear fender and license plate combo as it is an add on extending from the end of the frame. I'm probably going to run two braces from the license plate bolts to a bolting point in front of the rear end of the frame, to act like a gusset. I figured I will use some 3/8" or 1/2" OD Stainless Tubing, flatten the ends in a vise and the drill a hole into the flattened ends, kind of like a truck mirror bracket.
The other source I think is from the skid plate, might look at changing the rubber bumbers and maybe even add some by the front underside of the engine. There is nothing to prevent vibration between the mounting point in front and the rubber bumpers and mounting point in the rear. I figured if I get some small rubber bumpers with threaded hole on one end, I'll match up the height to the space between the engine and skid plate to then bolt the rubbers onto the skid plate.
What do you all think??
Andi