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#698798 - 06/17/17 1:11 pm Re: A65 porting and throttle response video. [Re: Mark Parker]  
Joined: Aug 2001
Posts: 3,164
gavin eisler Online content
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gavin eisler  Online Content
BritBike Forum member

Joined: Aug 2001
Posts: 3,164
argyll. scotland, uk
Hi Mark, my big bore uses 3/8ths fasteners, John usually uses stepped fasteners, but my barrels slipped through the net, I uses a head gasket that had the fasteners thread tapped into the fasteners holes, after stripping I noted that the Cu had extruded up to help seal, theres not much meat for the gasket at the centre rear mount, havent had any oil burning issues , and no leaks , using similar torque values, 30 ft lb.

When I was looking into head bolt stuff I read an interesting write up on wasted studs in V Dub air cooled motors, all thread pretty much has the same effect allowing a more even stretch along the fastener, on the V dubs this helped to prevent thread tear out, compared with the solid shanked bolts which tend to stretch more at the threads causing them to strip out.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
#703420 - 07/31/17 7:56 am Re: A65 porting and throttle response video. [Re: Mark Parker]  
Joined: Apr 2005
Posts: 2,317
Mark Parker Offline
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Mark Parker  Offline
BritBike Forum member

Joined: Apr 2005
Posts: 2,317
Bega NSW Australia
This is from the weekend. With a Gopro aimed out the back. This is with a new stainless 2" X connector and rear pipes. This has the join a bit better so its better flowing internally.

https://www.youtube.com/watch?v=a_FSM22SokU&feature=youtu.be


mark
Page 16 of 16 1 2 14 15 16

Moderated by  Allan Gill 


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