RETURN OF THE REDNECK DONOR BIKE!!!!!! IT LIVES!

PILOT CLEANING AND FUNCTION ??'S

I figure rather than start ANOTHER thread, I'd keep going on this one, kind of a 'build progress' epistle:

I THINK that I have figured out how the pilot air screw works (and have found the culprit: )



this excellent image I found shows the air/fuel mixture relationship really well.http//:www.ingfatrygg.se/amal.html#Pilot jet

as I view the carb down through the slide cylinder, there are two tiny holes. (maybe .25mm)

question 1. does the air/fuel mixture enter the carb through these tiny holes when Idling?

question 2: What is the best way to clean out the fuel uptake passage ? the Left carb is blocked and the right carb seems gunky: is there a way to pop out the end plug to get something in there to clean that channel?

question 3: do you blast it with carb cleaner and compressed air or do you get in there with a suitable sized probe, like a drill bit or something?

cleaning those tiny holes is a snap for me as I'm a guitar builder and have a bunch of gauged guitar strings from about .008" up to about .030"

I think I'm on my way to finally understanding the function of this pilot system , as well as respecting it's simplicity.

Anxiously awaiting your learned responses.... I'm itching to RIDE!

Take a look at this, I think this guy makes it pretty clear.

http://www.jba.bc.ca/Bushmans Carb Tuning.html

that's an excellent site, Thanks, Cookie... I'm going to get those pilot holes surgically clean (I hope nobody is expecting me to WORK today ) and then, I'm predicting that I'll have a nicely Idling bike.

thanks to all

kfh

Carb Re-build update...... good news:

I felt like the ultimate redneck this week. I was watching the Red Sox and sitting in the living room rebuilding the carbs: my wife is out of town taking care of her Mother for a while after major surgery... just remember, mates, what gets said here STAYS here :wink: For the record, I did NOT bring the bike into the living room. I thought about it but decided that one cannot ride easily with stab wounds.....

I had used carb cleaner, 100 psi compressed air and a .016 guitar string at work to get them clean, so they were just about surgically clean when I re-assembled them.

After about 10 days of rain, we finally had a great day: so after the chores were done (wife comes home tomorrow.... I have a BIG mess to clean up before she gets here ...) I put everything back together.

Second kick she fired (as usual) ...... and after messing with the pilot jets (that actually work!!!!!!!) and setting the idle to just around 800 rpms +/- (no tach) it just sits on the center stand purring now!!!!!

I took it into traffic, pulls wonderfully, no backfire on deceleration, smooth low RPM running......

Sonofagun! I think I saved myself a $500.00 bill rather than getting the single mikuni! I can put that doe into a new metal tank.

enjoy the rest of your weekend, all! And thanks for your collective help. You continue to smooth out the lumps on this re-build !

Karl

p.s...... I confessed to my wife over the phone. no sense becoming a 'dead man walking' as someone in another post so estutely said.

p.p.s............ I stopped at a gas station for it's first fill-up: I had been getting my gas from a gas can prior to this. No less than 3 people came up to me to comment on the sexy beast.... I even get thumbs up from the Harley guys!

Allllll right! I love stories like this!

Nice going. I guess I won''t hold the Red Sox thing against you.

hopefully you're not a Phillies fan

kfh

Uhhh yeah

then you were vindicated on Sunday...... 11-6 or something....... it's all good fun and probably the only thing worth watching in the summer.

Summer on the Redneck Donor Bike

I just had to write and say that I took the 71 basketcase out for a spin around the block..... which ended up being about 80 miles: This brings my break-in mileage up to about 300 miles.

As you may recall, it was smoking on new pistons/jugs/and rings.......Thanks to you folks I changed the high tech oil out and put in straight, non-detergent 30 weight and have been NOT babying it....... punching it through the gears ..... giving it some "Welly" I think you call it and in general thrashing it about to moderately high rpms...... The smoking is just about gone: another couple of long rides and I'll switch back to the GTX I was originally going to use and I expect that the rings will have been thoroughly seated and the smoking will be a thing of the past. On my next rebuild I'll pay to have a pro hone the cylinders!


The only discernible problem seems to be a bit of clutch drag which didn't seem to be there when I first fired it up....I will investigate.

I did end up on the side of the road briefly as I thought that something gave out: it just died! But apparently they need gasoline to run efficiently and I was having so much fun I ran out: Good thing that they have reserve petcocks.

Thanks again to you fine people for your continued help..... AND for cleaning up the search feature. it's easy to find prior posts for most problems.

Karl

Great to hear Karl, They are fun. Sometimes it takes me awhile to remove the grin from my face when I get back from a ride, Also don't feel bad as I have run out of gas a couple of times. You know what they say: Time flies when your having fun. Or gas flows when your having a fun ride. :lol:

Hi Karl,

Great to hear its up and running and you're getting your rocks off on it. On the dragging clutch symptom, I had the same recently. Despite the standard adjustment settings, it was persistent. So off comes the primary cover and out comes the plates. The thing to look for is wear notches on the hub centre splines. These wear more on one side and grab the driven plates. You can, if you are patient file the notches down a little, just to take the rough edges off them. Its only a temporary solution as once the hardended surface has been broken, the notches will grow and the grabbing returns. I also dressed the tangs on the driven plates to smooth out any rough edges. A new hub centre is the right thing to do but time n money etc'.

Mick

Thanks Mick and Hortons....... I'm going to make the switch to ATF in the primary case as many of you have suggested. I already have the dyno Dave clutch-rod seal in place, so gear oil contamination shouldn't be a big problem. Also, I did notice that the primary chain was too tight: I re-adjusted that and it seems a bit better....

it's manageable this year: after the riding season I'll tear it down and give a look: These are the original clutch plates and though they look fine, age probably takes it's toll on the compound on the friction plates . Here in the northeast of the US we've had a stretch of rain that makes Seattle look like a desert. I don't want any extended down time so that, on those days when the clouds clear, I can be riding!!!!!

thanks all:

Karl