|
|
Post by Fox on Mar 5, 2011 18:26:45 GMT -5
Needle clip position will affect WOT mixture. Lowering the clip = richer
|
|
|
|
Post by billw129 on Mar 5, 2011 18:59:04 GMT -5
|
|
|
|
Post by billw129 on Mar 5, 2011 19:00:06 GMT -5
the motor is surging going up hills. I just cleaned the plug really well and I am going to see what happens after a ride around town at WOT.
|
|
|
|
Post by 90GTVert on Mar 5, 2011 19:07:13 GMT -5
The mixture screw on the carb shouldn't have much affect above about 1/8-1/4 throttle. It will have some tiny effect above that, but it's a really small effect. Tune that as I said before, and then leave it alone for a bit, unless it starts to have idle trouble after you adjust the float mess with the airbox or something like that. Needle position is most effective from roughly 1/4-3/4 throttle. Main jet, 1/2-full. It's important to understand these thing so you can make proper adjustments. I generally get the thing to idle, and then do WOT passes and worry solely about the main jet. Once that's dialed in, then worry about part throttle etc... Like I said before though, stick to one thing at a time or tuning gets confusing fast. Even for those of us that have spent a lot of time on it, it gets hard to decipher what changed what when you switch around to different things. Until the main jet is correct, you are wasting your time playing with the needle and constantly adjusting the pilot etc... So, verify the float level, do whatever you wanna do with the airbox (removing the snorkel would be about all I'd do at this point), adjust the idle mixture and speed so you can get it warm and stop and such without it dying, then focus on the main jet. 1)Eliminate problems. (Check connections, operations of systems, float height, etc... and be sure there is no mechanical fault to keep the engine from operating at it's potential.) 2)Adjust idle. Make it good enough to warm up and stop at stop signs and all that without dying so you can tune it. 3)WOT/Main Jet. Forget everything else. Get this dialed in first. Don't worry about 1/2 throttle or 3/4 throttle or anything else. Just tune the main jet for best WOT performance and proper fuel delivery. 4)Now you can move on to other throttle positions. BTW made a small donation figured it was the least i could do. Thank you. It is appreciated. |
|
|
|
Post by billw129 on Mar 5, 2011 19:22:49 GMT -5
so float height should be 12-14mm right
|
|
|
|
Post by billw129 on Mar 5, 2011 20:01:24 GMT -5
ok the old motor is about to go back in and this is about to get shipped back. I am getting so frustrated. It is still running rich with a 78 main and that doesnt make sense. It idles fine so screw is set good. Everything else is in good working order. I took the snorkel out of the air box and now I am getting a sound like marbles in the motor when it is at WOT on the stand. This is my transportation to work and this sucks. I can not see going up in jet size if it is running rich. My plugs were black earlier today and the scooter mechanic that I took it to so he could maybe make some sense of it said it him self that it was way rich. Now spark knock sounds like lean to me but I am scared to take it for a plug chop ride as I dont want to blow it up. I am probibly driving you all crazy with my questions and it is a long day. I think it is getting parked for the night.
|
|
|
|
Post by Fox on Mar 5, 2011 20:06:51 GMT -5
Smart man!
I think the best thing for you is to walk away and have a beer or three. There's no hurry.
|
|
|
|
Post by billw129 on Mar 5, 2011 20:13:45 GMT -5
LoL I think I will as a matter of fact. Fox that is the best answer I have had all day.
|
|
|
|
Post by 90GTVert on Mar 5, 2011 23:27:15 GMT -5
Yer right on the float height... or just kinda make it level with the body of the carb. Are you using premium fuel? If not, that might eliminate the spark knock.
|
|
|
|
Post by billw129 on Mar 5, 2011 23:50:16 GMT -5
yeah I am using the good stuff I figured that at only 1 gallon per tank why not. since i took the snorkel off it bogs out at 1/2 throttle so I think i have the rich problem figured out. Half drunk now going to mess with it more in the A.M.
|
|
|
|
Post by 2strokd on Mar 7, 2011 10:04:27 GMT -5
Maybe your enricher(auto choke) isnt working?
|
|
|
|
Post by billw129 on Mar 7, 2011 11:55:13 GMT -5
hey stupid question but do you think that a 101 jet would be way to big? I have a #60 drill bit but no jet's. I would like to think that the auto choke isnt working but it came off of the old carb. What I am getting now is great idle but when I grab the throttle it bogs. If i feather the throttle it will pick up and then bog. I disabled the vacuum petcock and plugged the vacuum line.
|
|
|
|
Post by 90GTVert on Mar 7, 2011 12:05:03 GMT -5
Most likely that's too big. That's more like what I use in larger carbs. You'll either need a set of numbered bits or an assortment of main jets to get this right.
|
|
|
|
Post by billw129 on Mar 13, 2011 21:01:18 GMT -5
Ok so new symptom. I have still been having lots of problems out of this motor and it is making me really frustrated. I swear I am so about to put the 50cc back in and call it a day. So new symptom if i take the airbox off I can see fuel mix coming out of the carb on the intake side. Is it possible I have damaged reed valves? if not is it possible that my pipe is just not going to cut it.
|
|
|
|
Post by 90GTVert on Mar 13, 2011 21:52:55 GMT -5
As long as it's not a lot of fuel, I wouldn't worry about it or the pipe just yet. These things happen in 2Ts. As long as it can idle, and there's nothing serious happening, forget everything till you have the proper main jet installed. You'll just frustrate yourself otherwise.
|
|
