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Briggs OHV & Vanguard / Re: Model 21b807
« Last post by Mickey mower makin on Yesterday at 10:16:52 PM »
Thanks for the info.What all did u do to build them up ? what all do i need to do for a arc flywheel and wich flywheel works ?
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Tires / Re: FXS 6in vs 8in
« Last post by docbro on Yesterday at 09:50:54 PM »
6 in rear wheels give less rotating mass, and gearing is different.  I have ran both in the FXT, and prefer the 6" in the rear.  I feel they also have less side wall flex.

Hope this helps.  It was great to meet you this past weekend.
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Briggs OHV & Vanguard / Re: 33CI AVS HELP!
« Last post by nip 19 on Yesterday at 09:07:45 PM »
Hub?
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Racing Mower Builds / Re: 2012 Super Modified Twin
« Last post by welderboy2004 on Yesterday at 08:30:31 PM »
I am 13 and I am building my first racing mower. your posts have helped me a lot. good luck racing and one other thing, OLD RED WILL NEVER DIE! :)
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Briggs OHV & Vanguard / Re: 33CI AVS HELP!
« Last post by Tom Price on Yesterday at 08:19:09 PM »
Checked that already.  I looked at a bone stock 33 we have on a running GP and when that motor is at the top of the compression stroke the flywheel magnet is 2/3rds the way through the magneto.  My race engine the magnet on the billet wheel is nowhere close to getting to the magneto
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Briggs OHV & Vanguard / Re: Model 21b807
« Last post by nip 19 on Yesterday at 07:03:58 PM »
Besides the shorter stroke and smaller cc head you basically have a 28. +/-  Built a few couple years back when USLMRA made them legal. 
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Briggs OHV & Vanguard / Re: 33CI AVS HELP!
« Last post by nip 19 on Yesterday at 06:47:08 PM »
Been a  while since I built one but the very first thing comes to mind would be the flywheel key. Pretty quick check if you just pull the bolt. Probably didn't get a good seat. I had problems until I  started using lapping. 
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Tires / FXS 6in vs 8in
« Last post by nic_hayes on Yesterday at 12:14:43 PM »
Whats the pros/cons of the 6in and 8in wheels in the fxs class.
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Briggs OHV & Vanguard / Re: 33CI AVS HELP!
« Last post by redline on Yesterday at 11:18:23 AM »
Air, fuel, spark and all at the right time..
You said you have the first 3.
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