Author Topic: Fuel Tank Hitting Carbs  (Read 1137 times)

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Offline Hondell

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Fuel Tank Hitting Carbs
« on: July 24, 2009, 06:09:22 AM »
I just am finishing my street rat made from 72-76 ? cb750 leftover parts from my restoration and when I put the gas tank on (many hours of candy blue) the petcock is hitting the carb lifter linkage (right side petcock. I believe the tank and frame to be from a 72-76 but am not sure. Any thoughts or suggestions. I have way too many hours on this paint job to get a new tank. Thanks
1972 Cb750 resto- 1972 Cb750 stoplight racer- 1972 Cb750 vintage touring - 1979 CBX- 1982 Kaw GPZ- 1968 Honda SS125A

Offline OldSchool_IsCool

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Re: Fuel Tank Hitting Carbs
« Reply #1 on: July 24, 2009, 06:41:02 AM »
Could you build a modified petcock that has a lower profile?
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If you take care of it.
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Offline MCRider

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Re: Fuel Tank Hitting Carbs
« Reply #2 on: July 24, 2009, 06:58:42 AM »
I just am finishing my street rat made from 72-76 ? cb750 leftover parts from my restoration and when I put the gas tank on (many hours of candy blue) the petcock is hitting the carb lifter linkage (right side petcock. I believe the tank and frame to be from a 72-76 but am not sure. Any thoughts or suggestions. I have way too many hours on this paint job to get a new tank. Thanks
I have discovered that there are miniscule differences between frames and gas tanks in the K series. I thought they were all the same but nooo...

Try a shim in the rear to lift the tank a tad. Don't know how much you need and that won't give you much.  I ran without the rear of the tank in the rubber at all, but sitting on top of it. The seat will keep it in place.

More serious surgery would include modifying the horshoe shaped mounts in the front and put a shim under them as well.
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1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Hondell

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Re: Fuel Tank Hitting Carbs
« Reply #3 on: July 24, 2009, 07:24:21 AM »
I was hoping I had just forgot a rubber spacer or something. Damn ,and I just rebuilt that petcock.
1972 Cb750 resto- 1972 Cb750 stoplight racer- 1972 Cb750 vintage touring - 1979 CBX- 1982 Kaw GPZ- 1968 Honda SS125A