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Old 11-24-2012, 07:10 PM   #51
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Joined: Mar 2012
Oddometer: 373
Originally Posted by MZRider View Post
Two gaskets are for heat isolation, mostly. Also they give the correct rearward positioning of the carbs when the stock air box and rubber boot are fitted.

I prefer to drill and tap holes in the manifolds and use "carb sticks" to balance the carbs, but lacking those you can use drill bits to measure and compare the opening height of the slides. More information here:

You may be able to find a pair of later intake manifolds with cast bosses and threaded ports. I think they started in 1974.
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