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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 18, 2013, 12:32:45 AM »
how did he get the porcelain out? Can't see squat looking down into the plug.
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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 17, 2013, 10:40:55 PM »
I put the 100 main jet in, shimmed the needle with two washers, put the uni filter back on and the engine is alive again.
But, I did a 30% throttle run with little to no idling. Went for a long ride at 30% throttle cut the key off and came to a rolling stop.
Pulled the plug, and it still looks like this:
But, I did a 30% throttle run with little to no idling. Went for a long ride at 30% throttle cut the key off and came to a rolling stop.
Pulled the plug, and it still looks like this:
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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 17, 2013, 01:05:47 PM »
Thank you!
I'm going to look into this, but I think I may just leave my 100 jet and go back to uni-filter. Stock airbox is aggravating the hell out of me.
I'm going to look into this, but I think I may just leave my 100 jet and go back to uni-filter. Stock airbox is aggravating the hell out of me.
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 17, 2013, 12:56:24 PM »
Hey guys just an update.
My tach actually was setup correctly. So yes, it definitely blew up at around 6k.... lol
I do remember hearing the exhaust note change significantly. It was loud and somehow got quieter and faded in volume a bit.
Either way, new top end is in and just doing some carb tuning as shown in my other post here: http://www.kymcoforum.com/index.php?topic=10279.0 in case you're interested.
My tach actually was setup correctly. So yes, it definitely blew up at around 6k.... lol
I do remember hearing the exhaust note change significantly. It was loud and somehow got quieter and faded in volume a bit.
Either way, new top end is in and just doing some carb tuning as shown in my other post here: http://www.kymcoforum.com/index.php?topic=10279.0 in case you're interested.
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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 17, 2013, 12:53:21 PM »I dont have your bike (I have the Like50) but I can tell you that with the airbox restrictor out (Note even open cone!) my MJ was up to 105. Stock restricted is 78 MJ.
Dont know if that bit of info will help ya but good luck
Where is the restricter specifically?
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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 17, 2013, 12:35:02 PM »
Awesome informative stuff there! Thank you!
I got a scrappydog kit put in (80cc) with the large head.
I tried to put the stock airbox back on but the scooter bogs and cracks so badly around 1/2 throttle. Here is a pocket cam video I recorded:
I had a 95 main jet in there and the plug in the scooter was pretty white with no signs of color ---> http://i44.tinypic.com/68ab12.jpg
After that, I put in a 100 main jet! Just as bad if not worse. Still no color on plug.
I swapped the carb from a Roketa into my scooter that has a 80 or 85 main jet and the popping was less, but still does it on occasion, but the scooter has very little power.
What should I do?
I got a scrappydog kit put in (80cc) with the large head.
I tried to put the stock airbox back on but the scooter bogs and cracks so badly around 1/2 throttle. Here is a pocket cam video I recorded:
I had a 95 main jet in there and the plug in the scooter was pretty white with no signs of color ---> http://i44.tinypic.com/68ab12.jpg
After that, I put in a 100 main jet! Just as bad if not worse. Still no color on plug.
I swapped the carb from a Roketa into my scooter that has a 80 or 85 main jet and the popping was less, but still does it on occasion, but the scooter has very little power.
What should I do?
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 14, 2013, 04:43:04 PM »
I've already drained the oil since pulling it and believe it or not the oil was quite clean. I didn't see anything shiny. The oil filter was also spotless. No large pieces or anything. I think most of whatever happened at the top end stayed there.
I will do the add oil drain oil and add again method. Don't want to go the gasoline route
Thanks for your help.
I will do the add oil drain oil and add again method. Don't want to go the gasoline route
Thanks for your help.
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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 14, 2013, 02:01:14 PM »
Lol I take it linking to another forum isn't allowed.. take that link down!
Yes, exactly. otherwise I would have done this already.
Blue, what 125 motor is a bottom mount motor that could be swapped in?
Yes, exactly. otherwise I would have done this already.
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 14, 2013, 01:59:56 PM »
Thanks for all of this info.
I think the lower end is OK. the connecting rod moves freely with very little play side to side.
I've already dumped the oil out but will need to add more oil to flush it a second time.
What is the best way to do this? Just add oil to the case and let it dump out?
Cylinder and valves didn't break, the piston lost a chunk of itself as well as the piston ring and started having a field day in the cylinder.
I'm pretty sure it ran crazy lean causing the destruction. I need to focus on carb tuning now.
I bought another 80cc kit + head from scrappy. I may put my stock airbox back on and see what happens.
Thank you for your reply!
I think the lower end is OK. the connecting rod moves freely with very little play side to side.
I've already dumped the oil out but will need to add more oil to flush it a second time.
What is the best way to do this? Just add oil to the case and let it dump out?
Cylinder and valves didn't break, the piston lost a chunk of itself as well as the piston ring and started having a field day in the cylinder.
I'm pretty sure it ran crazy lean causing the destruction. I need to focus on carb tuning now.
I bought another 80cc kit + head from scrappy. I may put my stock airbox back on and see what happens.
Thank you for your reply!
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Agility 50 / Re: Found the issue of no compression after high revving! Pics! + Question
« on: October 10, 2013, 03:35:44 AM »Better to go with a new motor maybe a 125.
Why a new motor? Just needs top end.
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Agility 50 / Found the issue of no compression after high revving! Pics! + Question
« on: October 09, 2013, 10:41:29 PM »
Hey guys,
I recently put the stock head back on my BBK (exhaust studs snapped, figured it was easier to swap the old head) and went for a ride.
I went fast down a hill and shortly after the engine was blown (very high heat).
I'm not sure the actual size of this BBK (I didnt install it, some moron did), i measured the cylinder wall inner diameter with a caliper and it measured 49mm. Can you help?
I want to do an 80cc kit. I currently have a MRP exhaust, open cone air filter, and I believe a 90 main jet. Do I need to go bigger with the main jet?
Also, where is the most trusted place to buy BBK's from with quality in mind? I want to do the large head as well.
Thank you guys in advance
PICS
1) http://i41.tinypic.com/28mfva9.jpg
2) http://i40.tinypic.com/2yorbx3.jpg
I recently put the stock head back on my BBK (exhaust studs snapped, figured it was easier to swap the old head) and went for a ride.
I went fast down a hill and shortly after the engine was blown (very high heat).
I'm not sure the actual size of this BBK (I didnt install it, some moron did), i measured the cylinder wall inner diameter with a caliper and it measured 49mm. Can you help?
I want to do an 80cc kit. I currently have a MRP exhaust, open cone air filter, and I believe a 90 main jet. Do I need to go bigger with the main jet?
Also, where is the most trusted place to buy BBK's from with quality in mind? I want to do the large head as well.
Thank you guys in advance
PICS
1) http://i41.tinypic.com/28mfva9.jpg
2) http://i40.tinypic.com/2yorbx3.jpg
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 06, 2013, 01:16:56 AM »
So now I'm left with two questions:
1) how do I know if the crank and bearings are OK? Best way to test?
2) Do they sell CDI's that have an improved speed but include the rev-limiter?
Thank you!
1) how do I know if the crank and bearings are OK? Best way to test?
2) Do they sell CDI's that have an improved speed but include the rev-limiter?
Thank you!
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 04, 2013, 10:21:22 AM »
I wish the CDI had a limiter. It must not.
I rebuilt the top end on a 139qmb before but I'm worried the bottom end could have damage.
How do I know if the crank and bearings are okay?
I rebuilt the top end on a 139qmb before but I'm worried the bottom end could have damage.
How do I know if the crank and bearings are okay?
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 03, 2013, 11:30:39 PM »A small engine like that might idle at 2000 rpm. My 250 cc bike idles at 1500 rpm, so maybe your displayed revs are half what they ought to be?
Well i think displaying half would be right, because I was pinning the speedometer trying to see if the RPM's would go any higher, and they did... and i blew the engine. must have been revving to 9k if I had to guess?
It got hot, very hot. I don't know what happened.
I think that's it for me and scooters.... im really bummed now.
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Agility 50 / Re: Just bought a digital tach -- interesting discovery
« on: October 03, 2013, 01:39:16 AM »
It's past 50mph on the chinometer but its way off to begin with. Maybe 43? 45?
Edit: will check center stand RPM (hate revving it on center stand, but Ill do it)
Edit: will check center stand RPM (hate revving it on center stand, but Ill do it)