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Post by riderboy on Jul 31, 2012 2:18:16 GMT -5
Yes its a Jonway and I have a Jonway Magnum and Rock Thunder and happy with them . Check the oil level and color to get an idea on it if has been serviced . A compression gauge like this www.harborfreight.com/compression-test-kit-66216.html is cheap and easy to test the compression . With airfilter or exhaust changes the carb will need to be upjetted to run right . I hope it has a title as if not will be a hassle to register or may even be stolen as many are . As long as you do not have driving privileges revoked , can pass the computer and vision test should be no problem renewing your MC permit . I got my MC license at 16 on a GS550 so a scooter should be very easy to take the driving test . The most important item you will need is a full face helmet which Greg has some for cheap scootdawg.proboards.com/index.cgi?board=auction&action=display&thread=52675 and leather motorcycle gloves for winter use . If its your first two wheeler than go here and read up on tips online2.msf-usa.org/msf/Default.aspx and here www.motor-scooters-guide.com/support-files/scooter-driving-tips.pdf A motorcycle riding safety course is a good idea for first timers , maybe required by your state as some do and can be eligible for a discount on insurance . I add Med Pay and roadside assistance to my policies as I do have have health insurance and Med Pay along with PIP personal injury protection will help pay for the ER bill if you wreck on your own . I do not know of a single rider who has never had a mishap or wreck as its easy to do and I hate to read about wrecks with a scooter and a car as the car always wins and often the scooter rider died Okay will get that compression device. Oh by the way I have those bluetooth helmet got it painted over black. It had skull and freaked out my mother. LOL |
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Post by gatekeeper on Jul 31, 2012 3:41:27 GMT -5
Take out the spark plug. Screw in the 10mm adapter and hook it up to the gauge. Hold the throttle wide open and crank the engine with the starter. Keep cranking until the needle makes it's highest reading on the gauge. I forget offhand what the compressing reading should be, will have to look that up.
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Post by jach on Jul 31, 2012 4:35:20 GMT -5
Gatekeeper has the right procedure there.
For compression numbers:
under 125 it will have a marked loss of power and may be hard to start
125-140 is marginal might be making less power than it should
140-175 is a good range for small 4 stroke motors
High performance motors will usually be higher unless they are turbocharged
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Post by richardthescooter1 on Jul 31, 2012 10:13:30 GMT -5
Your scoot is air cooled, that type filter needs to have more fuel (richer) thats why its over heating. you need to rejet that carb.
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Post by riderboy on Aug 2, 2012 1:37:31 GMT -5
Your scoot is air cooled, that type filter needs to have more fuel (richer) thats why its over heating. you need to rejet that carb. Hi no it's not air cooled. Because when u see underneath there is a raidator and fan. You can hear the fan. And Yes I know it have to rejet the carb. |
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Post by sledwrecker on Aug 2, 2012 5:39:12 GMT -5
So what's the word did you buy that beast or what?
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Post by riderboy on Aug 2, 2012 12:33:48 GMT -5
So what's the word did you buy that beast or what? No not yet. But I will soon. ;D |
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Post by richardthescooter1 on Aug 2, 2012 12:38:08 GMT -5
Sorry riderboy, thought it was air cooled, my mistake.
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Post by riderboy on Aug 4, 2012 5:28:58 GMT -5
Sorry riderboy, thought it was air cooled, my mistake.  will actually be my first scooter that isn't air cooled. |
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Post by riderboy on Aug 4, 2012 20:10:54 GMT -5
Went ahead and bought u.s general 95187 compression guage tester set at Harbor Fright. What should be the pressure for 150cc so I can do a compression test also that I have. Thanks. Oh this one cost me 19.99 plus tax. I don't know why some pic is upside down but here are few.    |
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Post by jach on Aug 4, 2012 20:58:17 GMT -5
Well that looks like it will work, you have a M10 fitting too. The closer to 150psi you get the better, a little over is better than a little under. Compression gauges aren't used all that often, but once in a while they save the day and for 20 bucks you can't go wrong.
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Post by riderboy on Aug 4, 2012 22:21:08 GMT -5
Well that looks like it will work, you have a M10 fitting too. The closer to 150psi you get the better, a little over is better than a little under. Compression gauges aren't used all that often, but once in a while they save the day and for 20 bucks you can't go wrong. Cool. My back hurt as hell. And want to take out the carb of my scooter 150cc. Nevermind I already did it. Tank has no gas what so ever but it bogs as hell so going to clean it. |
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Post by riderboy on Aug 5, 2012 16:44:55 GMT -5
Here are the result. Wow I'm a bit disappointed. I'm wundering if my guage isn't working.  |
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Post by riderboy on Aug 5, 2012 16:51:31 GMT -5
Well that looks like it will work, you have a M10 fitting too. The closer to 150psi you get the better, a little over is better than a little under. Compression gauges aren't used all that often, but once in a while they save the day and for 20 bucks you can't go wrong. Hi did you look at my guage. I'm disapointed. Would I be needing to replace cylinder? Or just the piston and ring? |
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Post by riderboy on Aug 5, 2012 19:10:01 GMT -5
Well that looks like it will work, you have a M10 fitting too. The closer to 150psi you get the better, a little over is better than a little under. Compression gauges aren't used all that often, but once in a while they save the day and for 20 bucks you can't go wrong. Hi did you look at my guage. I'm disapointed. Would I be needing to replace cylinder? Or just the piston and ring? Anybody out there? - Pink Floyd LOL Well I have to go to church soon. I understand people are busy on weekend since many work during weekday. |
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Post by riderboy on Aug 6, 2012 6:11:15 GMT -5
Oh crap forgot to tell the guy to hold full throttle. Would that be the cause?
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Post by jach on Aug 7, 2012 4:53:51 GMT -5
Yes that would be the problem, can't measure the # if you restrict the airflow to the cylinder.
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Post by riderboy on Aug 7, 2012 9:19:52 GMT -5
Yes that would be the problem, can't measure the # if you restrict the airflow to the cylinder. Exactly. So I guess the compression should be way over 100 psi. Probably don't need a rebuilt after all?? I have to buy it then instead of making the guy wait. He's been waiting longer then a week and a half for me. |
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Post by jach on Aug 7, 2012 14:37:00 GMT -5
Well you don't "have" to buy it, but if you are going to then I guess it wouldn't hurt to do it soon. I went out and checked my scooters' compression without holding the throttle open and it was 94psi, if I hold it open it's 148psi..
Don't know if that scooter will be the same, just letting you know for reference.
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Post by riderboy on Aug 8, 2012 15:44:06 GMT -5
Well you don't "have" to buy it, but if you are going to then I guess it wouldn't hurt to do it soon. I went out and checked my scooters' compression without holding the throttle open and it was 94psi, if I hold it open it's 148psi.. Don't know if that scooter will be the same, just letting you know for reference. Thanks. Well I guess it's no need for 250. But 250 is very nice size for a close to 300 pound gorillas. Well I'm actually close to 270lb. My 150cc scooter just need so much work. But I did order carb parts and got my valve stem replace. But that scooter the guy just bought the tag last month. And put it on front of my eyes. He thought he was riding with his tags. It cost him 100. My 150 still need tags, dmv fee is 190 plus tags and taxs. My 150 need alot of stuff compare to the guy 250. |
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Post by sunpaul70 on Oct 4, 2012 15:38:55 GMT -5
Hi everyone this is my first post on this subject. I'm riding a sun-l 250 cc and have owned it since 2006 and have 12.000 miles on it, a lot is interstate driving running around 70 to 75. If you are having trouble with your power sagging off at hi speed its probably thee different things One, get a new 40,000 volt Bosch coil around $50.00 dollar's, second hard wire a 2lb electric fuel pump into the fuel line and remove and plug the pulse pump form the carb its junk and won't lift the fuel at high speed because the carb is just about wide open and will lose pulse. Three Check your air filter make sure its clean, this engine has had problems with oil running into the air cleaner from the valve cover vent and plugging the filter. Hope this helps you, by the way Florida is a great state to ride. Run fast.
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will actually be my first scooter that isn't air cooled.