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Post by phatboy on Apr 24, 2015 15:07:35 GMT -5
I recently bought a Eton Beamer 2-stroke 49cc scoot, thought it just needed adjustment, but I think the problem is the hand grip, it does not stop in what I think should be the rest position. However, nothing looks broken inside though and there are no parts rattling around.
So what stops the handgrip in the rest position, is it something in the hand grip or is it in the metal casing around it that clamps to the handlebars?
If it is in the hand grip, are these basically universal or specific to the bike?
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Post by geh3333 on Apr 24, 2015 15:22:57 GMT -5
You should only be able to open then throttle so much , until the butterfly is fully open. There is usually a stop on the carb that only allows it to open so far.
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Post by geh3333 on Apr 24, 2015 15:26:38 GMT -5
Some throttle grips also have stops. I had one break on me and bought a so called universal grip and I had to modify it so it would open the butterfly all the way. I eventually bought the right one.
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Post by phatboy on Apr 24, 2015 15:35:35 GMT -5
It will do WOT no problem and open it all the way, the issue is when you are off the throttle there is like 1/4 turn of play on the hand grip, I assume there must be a stop at the throttle closed position too?
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Post by murkyapricot on Apr 24, 2015 15:37:55 GMT -5
I got my scooter new and it does the exact same thing, there's a little play on the throttle before it engages
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Post by lain on Apr 24, 2015 17:20:11 GMT -5
There should always be slack. My throttle also has about 1/3-1/4 of it being slack, the rest being actual pulling on the cable which is the real throttle. If it were more than a quarter turn slack I would get a shorter cable. As long as you can fully open the butterfly smoothly it shouldn't be a problem, just wait at stop lights just at the top of the slack.
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Post by JerryScript on Apr 24, 2015 17:22:34 GMT -5
You adjust the slack with the two nuts that hold the throttle cable to the carb. Tighten till there is 1/4" if play in the throttle handle, then tighten the retaining nut.
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Post by phatboy on Apr 24, 2015 18:09:46 GMT -5
I can't adjust out the slack even with the adjusters out all the way. The bike only has 1000 miles so I doubt the cable is stretched. That's why I thought something must be broken in the throttle grip.
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Post by geh3333 on Apr 25, 2015 7:19:11 GMT -5
You adjusted the nut holding the throttle cable to the carb?
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Post by geh3333 on Apr 25, 2015 7:20:49 GMT -5
You loosen the inner nut and tighten the outer nut
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Post by lain on Apr 25, 2015 10:07:36 GMT -5
I honestly don't understand why you feel throttle slack is a problem, are you trying to make it so there is no slack at all? If that's what you are looking for you could readjust the nuts, you could ziptie the throttle cable slightly out of it's normal spot which if you do right will pull the cable ends so there is no slack. Like put it further away from the carb.
I can't tell you how many times having slack has saved me though. I have 1/4 of my twist being slack, and I ride in the slack while riding at night after I have gotten to a good speed. I often cannot see the many potholes we have in Boston, but thanks to the slack I never hit a bump and accidentally reved myself into a wall or anything like I have seen other people do. When you are riding, if you unexpectedly hit a pothole your hand may slip and cause it to slide the throttle up a lil bit, usually when this happens to me I am able to catch myself before it speeds up, but I was riding next to my firend once, he hit a pothole, and unintentionally took off into a mail box... Just saying, slack is good...
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Post by phatboy on Apr 25, 2015 12:18:18 GMT -5
I don't mind a little slack, but there is a lot, I've never had a bike with so much. I don't think surging is much of a problem with a 49cc scooter  I am beginning to suspect the wrong carb was installed, with a throttle tube on the top that's too short. May also be the cause of bogging problems, another carb is on the way. |
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Post by geh3333 on Apr 27, 2015 23:35:51 GMT -5
So u have about 1/4 inch of dead throttle ? That is somewhat normal with these scoots . these scoots yes are tuned machines but they are no where near perfect. Considering the Gy6 are carbureted engines designed years ago and really not much if anything has changed to make them any more efficient " when it comes to the fuel delivery " , even 1/4 of dead throttle is pretty normal.
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Post by phatboy on Apr 28, 2015 14:57:07 GMT -5
Yeah it's not as bad now with a new carb... this one has a slightly longer tube and stronger return spring... still 1/8 of a turn dead space, calling it good now.
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Post by geh3333 on Apr 28, 2015 20:18:15 GMT -5
Yeah it's not as bad now with a new carb... this one has a slightly longer tube and stronger return spring... still 1/8 of a turn dead space, calling it good now. I have my carb tune din pretty good , and that's usually where I'm at also, 1/8 throttle left. |
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