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I was wondering if anyone that has the keihin cvk 36's on there xs has what the numbers on the vacuum Sync gauge should be for smooth running conditions. thanks.
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80 MNS; 81 Venturer -
Every engine is different.Nathan
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1978 XS1100E
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obviously, im not looking for exact numbers, just want to be in the ball-park.80 MNS; 81 VenturerComment
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Not really........every tuner is different. Should be anywhere from 18-21in. vacuum.Originally posted by natemoen View Post81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.Comment
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depends on your altitude as well.1980 XS1100LG Midnight
1991 Honda CBR1000F Hurricane
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Other things affect the readings also. Mine runs around 11-13 inches with the Keihins but then I have some head work and cams are dialed in differently than stock which affects the vacuum signal at idle.
I say just balance them all at whatever reading you are getting and you should be OK.Mike Giroir
79 XS-1100 Special
Once you un-can a can of worms, the only way to re-can them is with a bigger can.Comment
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Very true...........sea-level;21-22in.vac............here @5,000ft;18-20in.vac.........10,000ft;14-16invac. ......least that's been my experience at those higher elev.Originally posted by XS1100 Newbie View Post81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.Comment
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thanks for the input guys. its my first bike so im just trying to get everything right.80 MNS; 81 VenturerComment
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The whole concept of synching is that they are all at the same level, so get that correct. Then you tune for good fuel mix, which could change the synch, and re-synch, again, to the same level whatever that level is.
Even differences in valve seating, buildup in your exhaust pipes, ring sealing which is to say different compression per cylinder will change per bike. All effect the vacuum it will pull just as the altitude, or the tuner itself.Life is what happens while your planning everything else!
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