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Old 03-02-2014, 11:32 AM   #1
mantree OP
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Colorado to California carb bike

My fiancee and I are planing a trip form Fort Collins co (5,000 ft) to san francisco ( sea level) on our bikes next year. We have been discussing a EFI convention on both of our bikes her 72 cb750k with windjammer and my 89 yamaha venture. The cb doesn't have cv carbs but the venture dose. Her grandfather has a spare set of goldwing carbs (cv) that I could modify to go on her bike. My question is if the cv carbs are going to handle the altitude change I have never owned a cv bike before its always been old school carbs so I don't have any experience with them.
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Old 03-02-2014, 12:16 PM   #2
usgser
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You'll be fine.
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Old 03-02-2014, 04:40 PM   #3
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you'll be fine.
+1
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Old 03-02-2014, 05:21 PM   #4
AndyT
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I rode my '71 CB750K from Wisconsin (800') to Pikes Peak (14,000') without issue, except loss of power, which you'll have regardless.
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Old 03-03-2014, 06:17 PM   #5
eakins
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i rode a 80s cb750 all over the country.
Lucas Fuel treatment was the ticket to dealing with lean mixtures, heat, pinging & surging at lower elevations. i actually first found the stuff when riding low on my cb as it was running poorly. i stopped into a parts store and the guy said use this and super unleaded down here and your lean bike will be just fine. he was right and i never stopped using it!

http://www.amazon.com/Lucas-10013-Fu.../dp/B000FW7V50
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Old 03-25-2014, 06:51 AM   #6
mantree OP
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Thanks every one I am planning some short trips first down to Durango and then one to Santa Fe
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Old 03-27-2014, 07:54 PM   #7
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i rode a cb750 all over the west just fine
at lower elevations i went with premium and lucas fuel treatment to keep the engine happy.
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Old 03-27-2014, 07:56 PM   #8
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Thanks every one I am planning some short trips first down to Durango and then one to Santa Fe
was your hack parked on the street a block or so from the library the other day?
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Old 03-27-2014, 08:01 PM   #9
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was your hack parked on the street a block or so from the library the other day?
Yes I live in the brick apartment building that I was parked at that photo is at battery plus on shields getting a battery charged for my girlfriends cb750
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Old 03-27-2014, 11:24 PM   #10
Rgconner
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I've taken my 75 CB550 from 40 sea level in Sacramento to all four Sierra passes with no modification. One, I did 3 in one day.

Plugs do get a bit oily with the rich blend at 11K feet, so don't lug the engine, let her wind out.

She will love you for it. =)
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Old 03-28-2014, 08:14 AM   #11
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Originally Posted by Rgconner View Post
I've taken my 75 CB550 from 40 sea level in Sacramento to all four Sierra passes with no modification. One, I did 3 in one day.

Plugs do get a bit oily with the rich blend at 11K feet, so don't lug the engine, let her wind out.

She will love you for it. =)
Thanks it's still being modified to fit her I need to lower the rear just a bit already did the front I need smaller pipes and smaller hand leavers they are fine for my ham hands but hers are a bit smaller
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