The current jetting configuration in the bike:
Stock Needle - clip in 4th position
172 Main Jet
48 Pilot Jet
Stock Air Jets
This seems like a pretty rich setup where I should at least be able to start and run the bike and dial it back a bit afterwards but its extremely hard to start. Ive had it running with the stock pilot (42) jet as well as the 48 and played with the fuel screw in both setups and the bike still doesnt seem to run right in either situation.
I had it idling somewhat reasonably at a couple points in time and decided to take it for a ride and just see how it felt otherwise and it seemed great. Since it was just rebuilt I was hoping I could break the engine in a bit and this might help with starting but each of the 3 or so times I try to ride it, I get about 1/2 - 3/4 mi away and the bike starts to bog and stalls out then wont start, like it ran out of fuel. I looked down and since I have a clear fuel filter I could see gas flowing into the cab after it died as if the bowl was empty, so there might be some kind of weird float issue too, not sure if this is related to the starting/idle problem but I dont know where to begin with debugging it at this point. I have checked the cam timing which seems right to me, the clearance is a little loose on the exh cams right now but the engine builder told me they wear tight and it should be fine (?). When the piston is at TDC the cam lobes are both angled upwards away from each other. I saw in a couple places the lobes should basically be flat across at the point, like this picture:
However mine are not, they are both angled upward a bit - does that seem right? My timing marks seem to line up with the head the way it is now...
I also have a JD Jet Kit and was contemplating putting that in which comes with an Oring to do the AP mod, but that would be adding another variable to an already long list of variables, so I wanted some input on where I currently am first.
Please help me figure out where to begin with sorting this out - I know this is a long post with a shitshow of variables but Im really stuck with this thing right now. I didnt do the engine work myself - I just sent the engine out to be rebuilt alone and dont have a way of getting the complete bike out to the guy who did the work, so Im trying to get this sorted out myself.
Edited by black_chrome, July 16, 2013 - 07:03 AM.