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Whizzer Motor Bicycles Whizzer motorized bicycles are still produced today, and one of the oldest motor bikes around. Share some of your stories about this timeless classic with us today

The Yellow Jacket build thread


Discussion at Motorized Bicycle Engine Kit Forum in the Whizzer Motor Bicycles forum. Yep, this one has an auto clutch. The filter thing I believe is a PCV valve. I didnt change the ...
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Old 04-23-2009, 11:41 AM
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Default Re: The Yellow Jacket build thread

Yep, this one has an auto clutch. The filter thing I believe is a PCV valve.

I didnt change the lifters out as they had already been worked over with the addition of Quenton's top-end work.
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Old 04-25-2009, 01:33 AM
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Default Re: The Yellow Jacket build thread

Tonight I fitted the new Brooks saddle. Looks GREAT on the bike and is comfy.

Tommorrow, I'll take some photos. I'll also be working on modifying a Monark frontend to beef it up for Whizzer duty. This bike is going to be really cool when its done.
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Old 04-25-2009, 05:22 AM
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Default Re: The Yellow Jacket build thread

Lifters should be good as they showed no signs of wear after 600 miles of riding. We need to go riding soon, Say Tortilla Flat and beyond.
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Old 04-26-2009, 12:18 AM
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Default Re: The Yellow Jacket build thread

Tortilla flat would be great, as thats a relatively slow road anyway and we can reach it using surface streets from Mesa.
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Old 05-03-2009, 12:21 AM
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Default Re: The Yellow Jacket build thread

Here are some new pics of the Whizzer. Did a bunch of work on it. Fitted a Brooks B67 seat, laidback seatpost, small seat bag, and a cool vintage looking rear rack.



Also rerouted the PCV valve and tubing to hide it a little better. Looks a lot cleaner now:
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Old 05-03-2009, 02:32 AM
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Default Re: The Yellow Jacket build thread

The bike is looking great. I rode the Orange to work tonight and appreciate your quality work. I still am anxious about the free wheel at the crank. So far it is good, but you have nothing to do about that. I think maybe we can go out to the tortilla flat next week maybe.
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Old 05-03-2009, 02:53 AM
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Default Re: The Yellow Jacket build thread

I'd really like to get the new carb on the Whizzer before any major rides. I've found that the engine is leaking oil from most of the gaskets, so its gonna need a complete teardown and reassembly soon with new gaskets and sealant..

I had some issues with it today after about a 30 minute ride. It started losing power felt like the carb was possibly overheating... i checked the engine temp and it appeared to be OK.. around 430F
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Old 05-03-2009, 06:50 PM
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Default Re: The Yellow Jacket build thread

Well, I think I have the problem narrowed down to being electrical... ignition specifically.

I pulled the plug and found the plug gap to be set at .015" and the plug was terribly carbon fouled. I cleaned the plug and then reset the gap to .024" and now the bike barely runs. Spark is very very weak. So, I gotta find a wiring diagram so i can start tracing this thing out.
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Old 05-03-2009, 08:24 PM
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Default Re: The Yellow Jacket build thread

That is what I was complaining about before. It just takes a more persistent and knowledgeable mechanic to get to the bottom of it. So far the Rotten Orange is not so rotten.
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Old 05-04-2009, 03:18 AM
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Default Re: The Yellow Jacket build thread

Glad to hear the orange is working well. I'll get the whizzer figured out, its just gonna take some time.

I managed to get ahold of a wiring diagram for the NE5, so now I have a starting point to diagnose the issue at hand. I think i'll start by pulling the wiring harness out and checking it out thoroughly. Will probably also replace the connectors on it with better ones if they look flaky.

Here is a link to the wiring diagram if anyone else is in the same predicament as me:
http://www.piratepathy.com/WhizzerWiring.pdf

Last edited by datz510 : 05-04-2009 at 03:21 AM.
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Reflective Journal » Blog Archive » Quick scan of the net - whizzer This thread Pingback 04-24-2009 04:11 AM
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