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Agility 50 / Poor response at low speed - Must flutter throttle to get moving
« on: February 01, 2011, 04:10:18 PM »
Wow!
Before I get into my request for guidance, I'd like to say thank you all for participating in the discussion and making it easy to get information about these scooters. The internet really fulfills its potential in places like this. Keep it up, and I'm happy to be here to contribute whatever usefulness I'm able to.
I purchased an Agility 50 a few weeks ago used but almost didn't go through with it because it had been obviously sitting in the weather so long, and just kinda looked like crap. I had gotten him down to 200 before seeing it in person. I offered $140 and after some hesitation we made the deal. At that price and condition, I was hesitant to even expect it to start at all. It is a 2007 model though, with less than 3k miles on it... Not too shabby when they are selling slightly newer models of the EXACT same scooter in the shop up the street for 1900... 0_0
Here are the problems with it: When we got it, it wouldn't start and I knew the carb we just dinked, full of varnish and junk. It sure was. The kick starter is stuck too and will only move with an insane amount of force. I plan on taking the cover off and seeing what the hell is going on down there... It was covered in stupid stickers and filth. The unpainted plastic parts have been partially bleached by the harsh ultraviolet light of the sun. Going to dye them later. Other than that, the thing seemed to be in decent condition. How bad could it be, right?
In our spare time my friend (who helped me pick it up) and I have been working on the carburetor, cleaning it multiple times. Before the last cleaning, it would idle roughly. Upon dis-assembly, we saw that the pilot jet was clogged again. We tried to get everything looking spotless and after putting her back together again, she idles very well when warm, and will even reach a top speed of around 37-38 mph indicated on flat ground which seems pretty good to me. The CDI epoxy thing has not been cut into yet wither.
The problem is, it is very difficult to get the thing moving from a stop (moreso when cold). When the bike is cold, you have to flutter the throttle a couple of times to get the engine to rev a bit before you give it hard gas. If you try to give it full throttle when the scooter is cold, even at a modest rate of twisting, it will bog down and die.
Once the bike warms up, you can pretty much open the throttle wide open from a stop and it will verrrrry slowwwwly increase RPMs and the bike will crawl forward until the engine RPM starts to move up significantly and get decent acceleration. If I continue to flutter the throttle when warm, I can pull away from a stop faster.
If I flutter the throttle and get the revs up to a moderate level (but not wide open), then let off the throttle, it kind of hangs and returns to normal idle levels quite slowly.
So, in short: Lack of power at low speed. Engine RPMs hang after releasing throttle from modest revving. Idle seems normal. At 25 mph speed or higher, performance seems normal. Top speed is surprisingly high.
My guess is: lack of fuel? I noticed there are a couple of bolts missing on the air cleaner cover... grrr. Think there might be a leak there causing a lean state?
The problem is steady and not intermittent.
And hey, as an aside, what can you guys tell me about switching to a slightly beefier carb on this bike? Something with a manual choke instead of the wacky auto-bystarter? Any tips on how to set that up, or carb models to look for?
Thanks so much for all your help everyone!
Before I get into my request for guidance, I'd like to say thank you all for participating in the discussion and making it easy to get information about these scooters. The internet really fulfills its potential in places like this. Keep it up, and I'm happy to be here to contribute whatever usefulness I'm able to.
I purchased an Agility 50 a few weeks ago used but almost didn't go through with it because it had been obviously sitting in the weather so long, and just kinda looked like crap. I had gotten him down to 200 before seeing it in person. I offered $140 and after some hesitation we made the deal. At that price and condition, I was hesitant to even expect it to start at all. It is a 2007 model though, with less than 3k miles on it... Not too shabby when they are selling slightly newer models of the EXACT same scooter in the shop up the street for 1900... 0_0
Here are the problems with it: When we got it, it wouldn't start and I knew the carb we just dinked, full of varnish and junk. It sure was. The kick starter is stuck too and will only move with an insane amount of force. I plan on taking the cover off and seeing what the hell is going on down there... It was covered in stupid stickers and filth. The unpainted plastic parts have been partially bleached by the harsh ultraviolet light of the sun. Going to dye them later. Other than that, the thing seemed to be in decent condition. How bad could it be, right?
In our spare time my friend (who helped me pick it up) and I have been working on the carburetor, cleaning it multiple times. Before the last cleaning, it would idle roughly. Upon dis-assembly, we saw that the pilot jet was clogged again. We tried to get everything looking spotless and after putting her back together again, she idles very well when warm, and will even reach a top speed of around 37-38 mph indicated on flat ground which seems pretty good to me. The CDI epoxy thing has not been cut into yet wither.
The problem is, it is very difficult to get the thing moving from a stop (moreso when cold). When the bike is cold, you have to flutter the throttle a couple of times to get the engine to rev a bit before you give it hard gas. If you try to give it full throttle when the scooter is cold, even at a modest rate of twisting, it will bog down and die.
Once the bike warms up, you can pretty much open the throttle wide open from a stop and it will verrrrry slowwwwly increase RPMs and the bike will crawl forward until the engine RPM starts to move up significantly and get decent acceleration. If I continue to flutter the throttle when warm, I can pull away from a stop faster.
If I flutter the throttle and get the revs up to a moderate level (but not wide open), then let off the throttle, it kind of hangs and returns to normal idle levels quite slowly.
So, in short: Lack of power at low speed. Engine RPMs hang after releasing throttle from modest revving. Idle seems normal. At 25 mph speed or higher, performance seems normal. Top speed is surprisingly high.
My guess is: lack of fuel? I noticed there are a couple of bolts missing on the air cleaner cover... grrr. Think there might be a leak there causing a lean state?
The problem is steady and not intermittent.
And hey, as an aside, what can you guys tell me about switching to a slightly beefier carb on this bike? Something with a manual choke instead of the wacky auto-bystarter? Any tips on how to set that up, or carb models to look for?
Thanks so much for all your help everyone!