Sophomore Rider
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Post by keltex78 on Jan 22, 2014 16:38:54 GMT -5
I've been riding my Jonway YY250T since August, and have about 4300 miles on it. Not sure it it's related or just in my head, but lately, it's seemed a bit slower when taking off. I thought maybe I was just more used to riding the scooter so it just didn't seem as quick. I always wear earplugs when riding, so I'm not able to hear a lot of the quieter sounds. This afternoon, I rode into town, about a 10-mile ride, mostly at highway speed, so the motor had time to fully warm up. I stopped briefly at one location, removed my earplugs, and didn't put them back in when I left since I was just going to the other side of the block. When I reached my destination, without the earplugs, I was able to hear the valves tapping at idle once stopped. Not sure if this is related, but my fuel economy seems to have dropped a bit as well (nothing drastic). I've been gassing up at other stations so I didn't know if it was the fuel or if I'm just driving more aggressively since I'm used to the scooter?? So... reduced performance, valves tapping, a few thousand miles on the scoot, sounds like valves to me! The scooter has the 244cc motor, so adjustment should be a breeze. (Motor running and at full operating temp, loosen screw, adjust until tapping stops, tighten screw, and drive away). We'll see how it all goes!
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Post by shalomdawg on Jan 23, 2014 1:23:23 GMT -5
howdy, um I don't really think that is how it is done. something about feeler gauges etc
lotsa miles and smiles to ya ken
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Post by urbanmadness on Jan 23, 2014 1:31:01 GMT -5
howdy, um I don't really think that is how it is done. something about feeler gauges etc lotsa miles and smiles to ya ken Nope... on the CF250, you can adjust them by ear. You don't even pull the valve cover. The adjusters are external to the motor... it's awesome!!!!!! You can do it with feeler gauges as well, but there is no need. I wish more motorcycle and scooters were designed like that... It's really cool. Ray
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Post by alleyoop on Jan 23, 2014 1:55:40 GMT -5
Easy as one 1 2 3 on the motor: Alleyoop
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Sophomore Rider
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Post by keltex78 on Jan 23, 2014 12:21:40 GMT -5
Hey Alleyoop! Yes, that's the video I've been watching to get the process down for the valve adjustment. I hope that it works out that easy on my scoot...
My fuel economy has gone down from ~73mpg to ~65mpg. I hadn't noticed any tapping until yesterday afternoon. I still don't have any issues running at highway speed, but since it seems to have lost some pep off the line, I'm assuming valves are at fault. All the symptoms just seem to fit in line with the mileage. Cold weather just hit again so I'm back in the truck; Saturday should be a good time to hole up in the garage and get the valves adjusted.
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Post by alleyoop on Jan 23, 2014 15:17:21 GMT -5
I widh all the motors had external Valve adjustments, it would make it so easy and less prone to valve cover leaking oil etc.. as well as time taking off things to get the valve cover off etc.. Those 244 motors are very reliable and have been around for DECADES they put out good power and just crank all day long. Alleyoop
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New Rider
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Post by mektah on Sept 9, 2014 11:04:27 GMT -5
Where are the valves located? ~Sincerely a noob.
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Post by tvnacman on Sept 9, 2014 11:12:43 GMT -5
Where are the valves located? ~Sincerely a noob. You might want to start a new thread , state what scooter engine size and how many miles . John
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Post by spandi on Sept 9, 2014 12:26:28 GMT -5
Yep, got the externals on mine. Easy, breezy, lemon squeezy!
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Post by scooter on Sept 17, 2014 16:27:48 GMT -5
Nope... on the CF250, you can adjust them by ear. You don't even pull the valve cover. The adjusters are external to the motor... it's awesome!!!!!! Well, if that don't beat all.
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