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  #4151  
Old 08-18-2012, 12:24 PM
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guttermonkiey8467 guttermonkiey8467 is offline
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Join Date: Jul 2012
Location: springfield illinois
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Default Re: what did you do to your motor bike today?

hi everyone im working on my first build and im having problems with sputtering plug,cdi are good i notice that when it starts the fuel filter is foamy going to try to replace and mount to the frame. im thinking that vibration is causing air to get in the fuel and making it cut out
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  #4152  
Old 08-18-2012, 04:11 PM
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fatdaddy fatdaddy is offline
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Default Re: what did you do to your motor bike today?

Quote:
Originally Posted by guttermonkiey8467 View Post
hi everyone im working on my first build and im having problems with sputtering plug,cdi are good i notice that when it starts the fuel filter is foamy going to try to replace and mount to the frame. im thinking that vibration is causing air to get in the fuel and making it cut out
Probably not foamy gas. By the time it hits the float bowl it settles down a lot. Since I can't hear it run I can only guess at a couple of things it might be.
First, Make real sure you're getting a good seal on your intake. A simple way to do this is to dribble (just a very little) water on both ends of the intake tube. If it takes down the idle or kills it then you have a air leak.
The carbs on these things are the cheapest carb the chinese could find. If it's running rich then all yer gonna get out of it is 4 stroking and sputtering. You can try a smaller jet size but the best way is to simply get a better carb for it. Personally, I'm poor folk (can't afford a good carb,) so I hafta screw around with jet sizes and needle adjustments.
Another thing you might try that works for me almost every time as far as performance goes. Take out the baffle and see what happens. The stock exhaust is way too restricted. In fact, TRY THIS FIRST. Simply unscrew it from the bottom of the exhaust and pop it out. It will get loud so don't do it at midnight. If this helps then you should get a good expansion chamber for it. Like I said, I'm poor folk so I just run mine loud and proud, But I've never failed to see at least a little, usually a big, performance increase by removing the baffle.
Try these and get back to us, we'll figure it out one way or another.
fatdaddy.
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  #4153  
Old 08-18-2012, 04:40 PM
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Goat Herder Goat Herder is offline
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Default Re: what did you do to your motor bike today?

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Originally Posted by Dan View Post
about half way done building a work shop for her. She is special.

Not the short bus kind of special, snork.



Right now she is living behind some tires, a bicycle and a load of clutter. Just not up to the style of living of which she would like to become accustomed too.

Looking good! Can't wait to see what you put together in there!



Had switched from a 52 tooth rear sprocket to a 49. Cruising at 36 miles an hour the bike sits in a sweet spot. BoXer bike just chills out. Tops out at roughly 47..
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  #4154  
Old 08-18-2012, 08:18 PM
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CTripps CTripps is offline
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Default Re: what did you do to your motor bike today?

The wife's motorized bicycle has been having problems, seemed to be starving for fuel and bogging out sometimes. I changed the fuel filter, checked the fuel line, and figured I'd take a look at the carb while I was at it. I took the fuel bowl off and was thinking about replacing the gasket, since it had been pinched a bit. As I was looking it over I realised the mating side of the carb for the bowl was actually slightly curved, arch-shaped really. I'm thinking that it was probaby getting a bit of an air leak there, as I swapped it for another carb (after I tore that down and inspected it first), re-assembled eveything and now it doesn't seem to be having that problem.

Today we took the bikes and the trailer to the grocery store and back. First trip, so it was a bit of a learning experience. We're going to look more carefully at return trip routes. There were a few too many intersections where we had to hill-climb from full stop.

Anyway, here's a few pics:

First is the trailer, loaded up for the trip home. Holds two large Rubbermaid totes nicely.

Second is the trailer hooked up to my wife's motorized bicycle. I couldn't find a kiddie-flag I liked, so we have an old vis-vest across the back for now. She's going to make something better fitting for it from it.

Third is our bike, and trailer, locked up at the store. I think I'm going to have to get another cable and lock, it was tricky getting everything secured.

Last is the new fuel filter on her bike.

Edit: Here's a link to the trailer pics/album.
Attached Images
File Type: jpg 20120818_153037.jpg (265.2 KB, 42 views)
File Type: jpg 20120812_142605.jpg (310.7 KB, 45 views)
File Type: jpg 20120818_144004.jpg (232.5 KB, 43 views)
File Type: jpg 20120812_143359.jpg (279.6 KB, 44 views)
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My Builds: My Beast, Harley59's bike, my Cruiser

Last edited by CTripps; 08-18-2012 at 09:08 PM.
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  #4155  
Old 08-18-2012, 09:06 PM
fasteddy fasteddy is offline
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Default Re: what did you do to your motor bike today?

Looks great. Glad that you were able to get your wifes bike repaired.

Did you build the trailer or buy it? Great carrying capacity and a sturdy build as well.

Steve.
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  #4156  
Old 08-18-2012, 09:09 PM
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Goat Herder Goat Herder is offline
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Default Re: what did you do to your motor bike today?

Yeah that trailer looks like it will hold a lot
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  #4157  
Old 08-18-2012, 09:42 PM
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CTripps CTripps is offline
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Default Re: what did you do to your motor bike today?

Thanks guys.

We bought it as a beat-up 2-seat kid carrier, pulled it apart, cleaned it up and repainted it. I know it will support my weight, I managed to stand on it and balance it for a test.
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Any day that starts with a good ride is already a better day, and a bad day riding still beats a good day working.

My Builds: My Beast, Harley59's bike, my Cruiser
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  #4158  
Old 08-19-2012, 02:23 AM
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guttermonkiey8467 guttermonkiey8467 is offline
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Default Re: what did you do to your motor bike today?

thanks for the info fatdaddy. have not had a chance to ride bike today. just before work i ported the intake and as i was putting it back toghether i broke one of the bolts off. luckily i have drill press. drilled it out and made a tap by using a bolt and cutting 4 slots in it with dremel. did not think it would work but it acually worked.putting top end back toghether now. cant start it up till tomorrow dont have torque wrench to tighten head bolts. does anyone know where i can find torque specs for one of these chinese 50cc motor kit?
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  #4159  
Old 08-19-2012, 04:29 AM
LaLongueCarabine LaLongueCarabine is offline
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Join Date: Aug 2011
Location: United States
Posts: 59
Default Re: what did you do to your motor bike today?

Put a speedo on mine and now we know how fast we're going.

Butter zone (smooth pleasant ride no vibration) 27-30 mph

Fast cruise (some vibration not bad) 31-32 mph

Balls to the walls (Barney Oldfield position, low over the handle bars) 34 mph
(vibration that comes up through your happy sack up your spine to the roots of your teeth.)

My max speed down hill is 37.3 mph! (again low position, with Scottie's voice in my head, "Captain I canna give ya any more, she's gonna blow!")

We compared two other bike speedos and my bro's car so I think we're fairly accurate.
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  #4160  
Old 08-19-2012, 11:12 AM
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GearNut GearNut is offline
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Location: San Diego, Kaliforgnia
Posts: 5,106
Default Re: what did you do to your motor bike today?

Quote:
Originally Posted by guttermonkiey8467 View Post
thanks for the info fatdaddy. have not had a chance to ride bike today. just before work i ported the intake and as i was putting it back toghether i broke one of the bolts off. luckily i have drill press. drilled it out and made a tap by using a bolt and cutting 4 slots in it with dremel. did not think it would work but it acually worked.putting top end back toghether now. cant start it up till tomorrow dont have torque wrench to tighten head bolts. does anyone know where i can find torque specs for one of these chinese 50cc motor kit?
Here ya go.
http://motorbicycling.com/showpost.p...57&postcount=4
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