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Post by knobby on Apr 24, 2017 16:11:05 GMT -5
Leaving that line open you've got both an air leak and extra fuel, with no way to know how steady the flow or how much of each. You could have a fluctuating mixture. I'm surprised it works as well as you say! That is actually pretty cool *if* you can get your air/fuel safe and steady like that.. Thumb over the hole for choke!
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Post by thegammaghost on Apr 24, 2017 18:08:13 GMT -5
yeah i'm actually very surprised it runs as good as it does with the choke hole wide open like that. i can hit about 45-50mph on the speedometer. currently i have the mix screw 2 1/3 turns out, and the idle screw 1 3/4 turns out. and it seems to be running okay. only thing is, is that if i give it 1/4 - half throttle it gives no power to the wheel and will bog down and die once i let off. i added a washer to the throttle like Florida suggested which made it a little better but there is always that zone where if i throttle there to long it will die after i let off, any suggestions?
im very peranoid of destroying my engine with this wonky carb setup that i have, but i dont want to spend the 80 bucks the vm22's cost. ahhg anyone know of any cheaper vm22's that will work?
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Post by thegammaghost on Apr 24, 2017 18:17:26 GMT -5
also, i cant seem to get it to idle at all, with the hole plugged.
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Post by knobby on Apr 24, 2017 19:23:11 GMT -5
Its probably because of the air leak from the hose. Wide open the leak is not as much an issue because, percentage wise, its much smaller versus the wide open carb.
My neighbor's mustang was like that when he left a plug out of his intake manifold. Funky at small throttle fine at big throttle.
You're playing with fire.. but you could try reducing your hose opening if you think you are lean at 1/4 throttle. If you're too rich at 1/4 throttle there isn't much you can try.
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Post by 2stroked on Apr 24, 2017 20:52:13 GMT -5
My God I see design elements from those bikes on my Helix. Please try to fix that bysarter. I would hate to see you burn that top end.
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Post by culcune on Apr 24, 2017 22:55:32 GMT -5
I know you mentioned the cost of the scooter, so I would suggest, as they did on Advrider, that you lay out the cash for a new carb. I would hate to see you end up destroying the bike, even if it didn't cost you much initial cash outlay. $80 is relatively cheap insurance to ensure piece of mind.
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Post by 2stroked on Apr 25, 2017 9:47:01 GMT -5
^^^^+1
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Post by thegammaghost on Apr 25, 2017 10:55:19 GMT -5
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Post by thegammaghost on Apr 25, 2017 14:21:15 GMT -5
the stock carb is 114mm(4 1/2 inch) from the bottom of the float bowl to the throttle cap. all the vm22's im finding are much bigger than that and wont fit.
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Post by thegammaghost on Apr 25, 2017 14:45:16 GMT -5
guys, i found a guy who converted his choke into a manual choke. but im not exactly understanding how he did it. did he run a line from where the choke goes. to a valve, then to where the vacume tube goes on the intake? i dont think im understanding this right. heres the thread, its towards the bottom by Bear 45/70. if anyone can help explain how this is done i would be so thankfull! motorscooterguide.net/Forum/viewtopic.php?t=792
there are also more people who have done it on pages 3 and 4. my intake only has the Vacume tube, and oil tube on it.
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Post by knobby on Apr 25, 2017 16:28:45 GMT -5
Try it and see what happens.. That guy bear says he would shut the ball valve off after it was warmed up. Which goes against your results with your hose capped off. Unless he had his valve markings reversed.
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Post by thegammaghost on Apr 25, 2017 16:52:39 GMT -5
should i try it like this just to see what happens?
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Post by thegammaghost on Apr 25, 2017 16:54:55 GMT -5
ill just try plugging them both and see what happens.
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Post by knobby on Apr 25, 2017 18:15:48 GMT -5
That would be the same thing as the valve closed off. I thought you said you already tried that and it wouldn't run correctly?
A normal choke circuit does not loop back into the intake manifold. It should be all internal to the carb body and just dump fuel right in @ the carb.
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Post by 2stroked on Apr 25, 2017 20:31:45 GMT -5
I would try a manual conversion. Using a small bolt in a piece of hose, through the plastic cover you made. Pushing the new plunger down will close the choke up will open it.
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