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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #8351  
Old 06-15-2015, 07:46 PM
Slogger Slogger is offline
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Join Date: Sep 2014
Location: nohio
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Default Re: what did you do to your motorized bicycle today?

My bike uses the longer, offset manifold and is stock.
I'm doing battle with the screwy spraybar on a Dellorto SHA clone. It has this huge hole that is uncovered as you go past 3/4 throttle. Coincidentally the engine hits a rich blubbering trough right at 3/4 throttle. The lower hole is much larger than the carb jet and there is also an idle jet hole in the body.
The engine is geared so tall it will hit 30 @5700 rpm. No matter how much gas and air it gets this stock engine will never see 6500 rpm. I don't think the top hole is helping things.
I've been running a very small jet to keep it lean enough to wind out a little.

Today I went up a size on the jet and tried to solder the top hole shut. I did, but the solder was fouling the slide so it was picked off. Several attempts were made to flow it into the pipe, but it wouldn't do it right.
I mixed up a bit of JB weld and put a bit in the top hole. It's blocked. Forever. !

Now all the gas will have to draw through the slightly smaller mid range hole. I went up a jet size for insurance for the first test run tomorrow. (The JBW needs a little time.)

To fix a no-air-with-the-choke-on problem (it will hardly run with it on), I drilled out the choke plate air hole to 9/32". Can't hurt.

I'll find out tomorrow if the carb is now a paperweight, or not.

Havin some fun!
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  #8352  
Old 06-16-2015, 01:40 AM
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Springfieldscooter Springfieldscooter is offline
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Join Date: Aug 2011
Location: Springfield IL.
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Default Re: what did you do to your motorized bicycle today?

Today I learned that ALL these brand new Chinese made engines need to be examined carefully, before installation!

My brand new engine kit, had 2 base gaskets installed from factory.

Ive learned that others have experienced cylinders that were installed backwards, and other engines with 3 head gaskets!
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  #8353  
Old 06-16-2015, 02:03 AM
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Panhead Panhead is offline
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Join Date: Mar 2015
Location: Michigan U.S.A.
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Default Re: what did you do to your motorized bicycle today?

I added some fuel before heading out & then took the ol' soldier on out for a little cruise around my end of town. Stopped by the gas company & paid that bill and then just rode. The pleasure of this is that before I discovered this particular website simply cruising on that little sucker didn't happen. Now, I roll up to the local market and I'll have some guy lean out his window and ask "Hey, what does one of those cost?"
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  #8354  
Old 06-16-2015, 02:03 AM
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DRBS DRBS is offline
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Location: Westland MI U.S.A
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Default Re: what did you do to your motorized bicycle today?

wouldnt be surprised they work 12 year olds 11 hours a day no breaks for a whopping 15 cents a day what do you expect LOL
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  #8355  
Old 06-16-2015, 02:31 AM
dtv5403 dtv5403 is offline
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Default Re: what did you do to your motorized bicycle today?

I've seen videos of a couple factories, no underage workers in any of them.
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  #8356  
Old 06-16-2015, 08:41 AM
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DRBS DRBS is offline
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Default Re: what did you do to your motorized bicycle today?

its a joke LOL
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  #8357  
Old 06-16-2015, 05:08 PM
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Southgate Jonny Southgate Jonny is offline
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Join Date: May 2013
Location: Laguna Beach, Ca.
Posts: 85
Default Re: what did you do to your motorized bicycle today?

Had a stripped exhaust stud hole so I tapped out both holes to 5/16"-18:
Got a longer plug wire so I could mount the cdi under the engine:
Installed a small solid brass petcock to keep the fuel line away from the head:
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Last edited by Southgate Jonny; 06-16-2015 at 06:47 PM.
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  #8358  
Old 06-17-2015, 12:19 AM
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LandSpeedRecord LandSpeedRecord is offline
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Location: Tucson
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Default Re: what did you do to your motorized bicycle today?

My carb was heat soaking so bad it warped the bowl on my RT carb and I had to put the NT back on for now. It was sitting at too much of an angle on the short intake so I made a 6 inch piece of hose and angled it to the side of the seat tube. A quick test ride and the mid range felt stronger than ever ha ha. I also did more research and part gathering for my 4 stroke.

Last edited by LandSpeedRecord; 06-17-2015 at 12:22 AM. Reason: spelling
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  #8359  
Old 06-17-2015, 02:48 AM
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Panhead Panhead is offline
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Join Date: Mar 2015
Location: Michigan U.S.A.
Posts: 74
Default Re: what did you do to your motorized bicycle today?

I received & installed my wide three piece crank into the Skyhawk frame I'm using for my current project, then realized it is tapped to receive 1 piece crank pedals. I had a couple of sets of nice, steel pedals tucked away for this. Unfortunately, they will not fit this crank.
I am a trifle surprised.
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  #8360  
Old 06-17-2015, 09:56 PM
woogie_man woogie_man is offline
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Join Date: Aug 2013
Location: Fargo, ND
Posts: 224
Default Re: what did you do to your motorized bicycle today?

Just got done painting my frame, forks, and rims.

Found some point called Montana spray paint. They have some awesome colors to pick from. I went with a slimer green for the frame and forks, electric blue for the rims, and automotive orange for my hub adapter. The parts are in my garage drying now. Pictures will soon follow.....
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