Jetting question

[evaneyeball]

I'm sure I have started a thread on jetting before and now I cant find it or I'd post in there. Anyhow I am redoing my motor and have no idea where to start on jetting it, I am going to start fat and go down from there I think I fried my old top end by (no offence to anyone) by just starting with what arlen told me then leaving it and I think it was too lean. So where should I start with a 350 dune ported by arlen, his 350g pipe, I will be running a 38mm keihin, race gas head, running 110 mixed 32:1 with dumonde tech l111. I plan on running this the whole time. The only thing I might change is the oil incase I run out and cant get any in time. Thanks for any help. I'm going to trust you guys this time.

[2ndmoto]

I think I was in the
178
Ddj 4th from top
55 pilot

Very similar setup to what you are running, except mine was built several millennia ago. I don't think many run this needle these days. Granted I do ride a bit lower in the rpm range and don't do much wide open throttle.

Arlan should be able to give you a good starting point.

[The norm]

A good place to start is 190 main/55 pilot/DGH needle at the 3rd groove/Airscrew 1.5 turns.
You will most likely end up around 180, but always start big. The bigger the cylinder the more vacuum it creates so it will pull more fuel out of a 180 than a stock cylinder will. Sometimes an engine will want more fuel than expected. Pete told me my 391 would need around a 180-185 main, but it wasn't enough fuel. I am running a 205 in it and it pulls hard all the way through 6th gear. Many people have tried to help you with your jetting since you joined the 250R community and it just doesn't seem like you want to listen. I have personally given jetting comparisons to my son's R's which were set up very similar to yours. So I honestly feel like pointing the finger at someone is out of line. If you choose to assemble your engine yourself you must fully accept responsibility for any engine failure. When I bring a complete engine home from Hybrid Engineering I install it in the frame, bolt on the reeds/carb boot. Then plug the exhaust and do a leak down test. I do not do that because I don't trust Pete,  I do the leak down test to ensure that the engine is air tight. I had an engine fail this year because I was in a hurry and didn't do a leak down test after adding a reed spacer. That could have saved the engine.
Always err on the side of caution! You are walking away from the $120-$150 piston kit and stepping up to a $200-$250 piston kit.
When in doubt add more fuel.
Loren

[evaneyeball]

Thank you, sorry for ignoring your suggestions, I did trust arlen with what he suggestion it ran great I thought it was fat and it's not his fault I messed up and my motor just needed more fuel than I thought and I feel like if I had listened to you it would be fine and I would have ended up with a better running R and bigger jets. On this build If i have any questions i am going to ask you guys and I am not going to completely ignore arlen I'm just going to listen to you guys more and I will start with atleast a 190 main and atleast 55 pilot.