|
|
Post by carpaltunnel on Apr 10, 2014 16:35:36 GMT -6
I've made a 3-minute video explaining my issue and providing audio of it. Here's what's included: Carbs are at stock EXCEPT for springs which are cut a bit to allow the vacuum to rise. Valve adjustment has been done and they were a helluva lot better than my first attempt. She idles decently and takes about half-choke to fire up in 60 degree weather. She was fairly warm with no choke during the video. There's no gas tank but I'm positive it's not a vacuum issue and I have my right carb blocked and my finger blocking the left. Any other questions let me know. When I started this morning I had my floats set to about 15mm and when i restored them to 17mm I didn't hear/notice much of any difference. Needles are not shimmed and I get a bit of gas kick back into the filters if I rolled too hard and she sputters. Will,
|
|
|
|
Post by Blaine on Apr 10, 2014 17:31:33 GMT -6
I can't tell from the video.Are the pods in place.They need to be for the carbs to work properly.Also you need to shim ur needles to get good mid-range.Also make sure that the clear vent/overflo tube is open.   |
|
|
|
Post by carpaltunnel on Apr 10, 2014 17:44:56 GMT -6
Pods are in place. Vent hose is clear/clean. Needles have been shimmed with 3 x 3mm washers each and it made little to no difference.
|
|
|
|
Post by carpaltunnel on Apr 12, 2014 17:22:26 GMT -6
Okay, I know this is heating up and everyone is watching with bated breath, I made a drastic change to the air system and used a disk of masonite to restrict the flow of air through the pods in to the carbs. With my needles at stock, bowls at stock, vacuum spring cut (I have stocks in the mail to test out as well) and stock 125 main jets, I was able to get low end power (without load, mind you) and then some! She started crapping out at higher RPM so once I have her rolling I'll really see what's going on. That's tomorrows project. As you can see in the picture I have a 3/8" hole surrounded by 10 1/8" holes. I started with the 3/8" alone, then added 5 holes, and then added 5 more. Turns out the extra 5 were too much so tomorrow I'm gonna make a few more disks with 5, 6, and 7 extra holes and test them all. Now the biggest issue I've noticed, and this is probably entirely due to these disks, is when I throttle up and release quickly, she loses power and her RPMs tank significantly before returning. If I take her up to where she doesn't have power and cut the throttle she bogs down and then dies. Is this due to a lack of airflow? Am I biting myself in the Donkey with this fix? Any thoughts are greatly appreciated. Yes, vent hose is clear, vacuum ports and plugged. |
|
|
|
Post by Blaine on Apr 12, 2014 19:03:13 GMT -6
You need bigger MJ's to let in more fuel so you can take advantage of the pods.By restricting air flow you are losing power & the benefits of the "free flowing" pods. I went with a #135 MJ but yours may vary depending on your location. |
|
|
|
Post by carpaltunnel on Apr 18, 2014 20:00:18 GMT -6
Update - I've got new vacuum springs installed, no shims, floats set to about 15.5mm (measured from carb edge to bottom of float when float needle is closed) and main jets to 135. I'm still getting crappy low end power. When I roll on throttle it gets a bit of power then starts to flounder. i am NOT using those masonite disks. I also get some gas blowback in to the filters at high rpm. Shims, higher floats? I had cut springs in there previously and they didn't seem to help. When I put the stock springs in I think the overall improved. Sigh, and the weather is getting so nice, too.  |
|
|
|
Post by Blaine on Apr 18, 2014 20:21:57 GMT -6
Update - I've got new vacuum springs installed, no shims, floats set to about 15.5mm (measured from carb edge to bottom of float when float needle is closed) and main jets to 135. I'm still getting crappy low end power. When I roll on throttle it gets a bit of power then starts to flounder. i am NOT using those masonite disks. I also get some gas blowback in to the filters at high rpm. Shims, higher floats? I had cut springs in there previously and they didn't seem to help. When I put the stock springs in I think the overall improved. Sigh, and the weather is getting so nice, too. Can you pull a plug & see if it is wet (flooding) & are you sure your diaphrams are sealing properly.You should hear vacuum & feel resistance when you lift the slides by hand. |
|
|
|
Post by carpaltunnel on Apr 19, 2014 8:25:44 GMT -6
I know when I move the vacuums there IS some suction that I can both feel and hear. The diaphragm is solid, no cracks or creases, and it seats properly before I put the cover back on. I'm about to go fiddle with them some more so I'll check the plugs after she's run for a little and see if they are wet.
|
|
|
|
Post by carpaltunnel on Apr 19, 2014 10:14:18 GMT -6
Good update!
I raised the floats to about 14mm and that helped tremendously with the low end. Actually putting her in to gear and under load she still had plenty of get up and go. The mid was a little hesitant and four shims did a little bit. As far as I'm concerned she's rideable while I can tweak in the evenings and weekends.
Still 135 main jets - perhaps larger would help the mid and in to the high?
AND I forgot to mention my plugs were dry and seemed like they were in great condition. They have less than 200 miles on them I think but their overall coloration was good.
|
|
