73 Yamaha RD350, New Cylinders and Pistons, Boggs after a few min of running.

[Karl squire]

Took the bike out for a ride, definitely starving for gas, I can start it with the choke on, then take if off, will run say a block or so, then it will start bogging (starving for gas) I flick the choke then it runs good turn the choke off it starts to starving for gas again after a few min. Pulled the carbs apart double checked everything floats are about 21.5 to 22.5, the spec for float height is 23 - or + 2.5
Air screws are 1 1/2 all jets and passage ways are clear and clean.
its like the with the choke on the bowls fill up but once they the choke is off the engine uses the gas in the float bowls and no more gas flows in
Any thoughts?


Maybe some one on here has an idea. New cylinders, Pistons and Rings
1973 Yamaha RD350
Dave F mod
Have not started riding it yet, just in the Heat cycles did 5 heat cycles.

Problem:
Start up is good but after a few min of warming it starts to bog like its not getting enough gas, I put on the choke and seems to run better.
Carbs are Synced, Timing is bang on, Vape ignition.
Carbs are VM28 from a RD400
JL pipes, 220 main, 27.5 pilot, needle 3rd.

[m in sc]

drop needle a clip

[Karl squire]

does that make sense to do it on one cylinder?, remember this is only happening in one cylinder.

[Karl squire]

asdfasdf

[Karl squire]

drop needle a clip

does that make sense to do it on one cylinder?, remember this is only happening in one cylinder

[m in sc]

no, but it sounds rich anyway. you drilled out the brass ball and drilled the airjet to 2.00mm? if it sjust one carb, id expect a blockage in an airjet.

[Karl squire]

no, but it sounds rich anyway. you drilled out the brass ball and drilled the airjet to 2.00mm? if it sjust one carb, id expect a blockage in an airjet.

s

no, but it sounds rich anyway. you drilled out the brass ball and drilled the airjet to 2.00mm? if it sjust one carb, id expect a blockage in an airjet.

After a while if trying different things it seems both plugs are not dry, so "droping the Needle" seems like a good idea . So your saying move the clip from position 3 to 2 so it does not liff the needle as High?

[m in sc]

yes

[Karl squire]

yes

Thank you