there's a lot of excellent response here, i've been away from riding an xr650r which is out of this world fun, if only they were around in the late 70s, they're that much of blast. anyway getting the responses even though my memory is taking a dump, the ones that i had questions from in the past were well drilled in my memory and it's a pleasure to know you're all around still together.
got no where today with heating it 2 times and pb blaster then pulling like heck on the aluminum elbow on top even with a dowl in the hole leveraging on the top of the stipped carb, nothin. they are tight in clearances more than the others i got. i wasn't kidding about the black powder, i loose patience and if anything seeing the slide fire off leaving only a trail would make me happy so i'd quit tormenting myself, every carb project there's some other catch that wont budge.
this'll explain the levels of frustration as an example, 7 yrs ago or so, it's probably here on the site, was working on a rack of 4 400f carbs trying only to get the float levels bench tested before mounting them, i've worked on bikes my whole life, every day of completely disassembling because of a peculiar 1 or 2 various carbs would be pouring out overflows, while one or 2 others wouldn't be getting any gas. they switched every day, on the 30th day i was so frustrated that instead of keeping the jets in the same bowls, screws in the threads they came out of, i piled everything in one pile and put every jet float and pins just wherever they randomly were picked for, and the sob had no leaks, and fuel levels all were spot on. for the next 6 yrs. i ride it every day, until 2 yrs ago, and it broke the day i went to look at this new addition. got a flat and to push it 5 miles, riding a quarter mile leaning over the bars. is all the cheating i could do to get a bus ride home to get a wheel off of a 400 that's been sitting in the garage the past 10 yrs and outside since the 80's on what looks like the stock tire, it was so hard that you could file it, i aired it up it had a slight valve core leak, it was almost midnight getting back to where the bike was with an air compressor which i didnt use, put it on adjusted the brakes to the max adjustment and rode it 12-15 miles, on 40 yr old tire and tube. in 05 i put that motor that's sat in back yard uncovered in my frame after work one night because my motor cracked a compression ring 15 miles away from home, going about 75mph 90 miles one way, it fell on it's face, didnt' pull over i rode it home at 45 or 50 all she'd do, and rode it to work 90 miles away the next day. then i realized the motor only had a just over a 1000miles on it.
summarizing all that was input: i'm first gonna try the boiling water, for a few mins, i gotta find the heat infra red gun to keep track of temps for now then spray it with pb blaster as that's all i got tonight, that'll keep the black powder in the can anyways. caring for my mom the last 9 yrs her in hospital bed, in the living room. she was a handful to say the least, she passed away 1 yr ago 2 days ago. bike is in the living room now. i thought i would have it made in 2 weeks after she was gone. it's only gone downhill since then.
