These bikes have a 4.2 gallon tank including reserve. You should be able to get 120-130 miles before you tap the reserve. Something is definitely amiss.
Is it carbed? If so, carb probably needs a thorough cleaning and a kit to replace the rubber bits, and gaskets. Also inspect the rubber diaphragm on the needle slide. Check to make sure the float valve doesn't have gummy fuel residue in the needle.
It also sounds like whoever did the work may have used too big a main jet, common among DIY guys who think if is bigger is better, then huge must be great. A stock main in one of these is 138. Dynojet uses a different numbering system than Keihin, so a Dynojet 140 is the same as a Keihin 152. a small change can make a big difference. Also, check to see what kind of air cleaner is on the bike. It may be running too rich if the air cleaner has not been replaced with a high flow.
I'd start by pulling the plugs and inspecting them. It won't be a terribly accurate tuning indicator, but it will tell you if you're running too rich, as they will be black and sooty. Let us know what you find.
Is it carbed? If so, carb probably needs a thorough cleaning and a kit to replace the rubber bits, and gaskets. Also inspect the rubber diaphragm on the needle slide. Check to make sure the float valve doesn't have gummy fuel residue in the needle.
It also sounds like whoever did the work may have used too big a main jet, common among DIY guys who think if is bigger is better, then huge must be great. A stock main in one of these is 138. Dynojet uses a different numbering system than Keihin, so a Dynojet 140 is the same as a Keihin 152. a small change can make a big difference. Also, check to see what kind of air cleaner is on the bike. It may be running too rich if the air cleaner has not been replaced with a high flow.
I'd start by pulling the plugs and inspecting them. It won't be a terribly accurate tuning indicator, but it will tell you if you're running too rich, as they will be black and sooty. Let us know what you find.
