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xs650 > > Motorcycle Systems > > Electrical > > advance weights


advance weights
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tito650
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Joined: Dec 20, 2008
Posts: 200
Location: pennsylvania
PostPosted: January 22, 2009, 9:35 pm    Post subject: advance weights
i'm thinking about convering my points to a magnetic pickup .but was wondering if i realy needed the advance weights? what would happen if i scrapped them? and made it all solid.
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jpowell
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Joined: Sep 04, 2008
Posts: 193
Location: Cincinnati, OH 1978 SE(special)
PostPosted: January 22, 2009, 9:46 pm    Post subject: Re: advance weights
Well then you're gonna have to come up with some other way to make the ignition system advance...
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Jeff
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cpotts454
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Joined: Jun 21, 2007
Posts: 447
Location: Louisville, KY
PostPosted: January 22, 2009, 10:01 pm    Post subject: Re: advance weights
Just to help you understand a bit, some of the after market magnet pic ups us the advancing weights for the advancing curve, just like if they were points. Others, like the Boyer ignition have a computer controlled advanced curve. Correct me if I am wrong please.
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tito650
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Joined: Dec 20, 2008
Posts: 200
Location: pennsylvania
PostPosted: January 22, 2009, 10:05 pm    Post subject: Re: advance weights
ok just what i thought thanks !
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tito650
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Joined: Dec 20, 2008
Posts: 200
Location: pennsylvania
PostPosted: January 22, 2009, 10:38 pm    Post subject: Re: advance weights
is there anything aftermarket u know of to advance it that i can just plug in ?
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xsleo
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Joined: Oct 28, 2007
Posts: 1528
Location: Earlville NY
PostPosted: January 23, 2009, 8:26 pm    Post subject: Re: advance weights
some old time drag racers used to weld the advance on thier distributars. set the timing at what it needs to get max horse power at the rmp they ran down the track with. don't start well or idle well but worked at the rpm it was set for. i would either use a setup with a built in advance curve or use the stock advance setup. that way your engine will be timed right across the rpm range.
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'75 XS650B with a 79 dual disc front end, rear disk brake, Chrysler reg, Radio Shack rect, LED tail/ brake and turn signals.
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thorshammer
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Joined: Dec 12, 2008
Posts: 58
PostPosted: January 24, 2009, 4:01 am    Post subject: Re: advance weights
I like to keep the mechanical advance because by changing the weights or springs or the shape of the weights I can alter the advance curve to better suit mods to the engine.
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xsjohn
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Joined: Jul 30, 2006
Posts: 5857
Location: North Carolina USSA
PostPosted: January 24, 2009, 4:05 am    Post subject: Re: advance weights
Exactly.........

The Yamaha advance curve on the 80-84 is right on too........goes up nice a slow like it should......unlike some of the other electronics........

xsjohn
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