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Author Topic: Stuck main jet  (Read 1100 times)

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Offline aminemed

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Stuck main jet
« on: February 20, 2018, 01:29:07 PM »
Pls see the picture

My cb 750 main jet carb is completely stuck in the emulsion tube. Tried with wd 40 and with an 8mm wrench as well. It is stuck ! This is the case for all 4 main jets dont know what to do!!
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Offline ekpent

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Re: Stuck main jet
« Reply #1 on: February 20, 2018, 01:44:55 PM »
 Are you going to be changing to a different size or is the jet damaged. If no on both accounts you can just leave it as is. If its clean inside it should work. Holding the emulsion tube gently in a vise will give you a better chance with a proper screwdriver..
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Offline aminemed

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Re: Stuck main jet
« Reply #2 on: February 20, 2018, 01:51:38 PM »
I want to change the jet size..
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Offline Yamahawk

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Re: Stuck main jet
« Reply #3 on: February 20, 2018, 03:02:05 PM »
Not sure if this will work, but WD40 isn't the stuff you should use. Pick up a can of AeroKroil or PB Blaster... the PB Blaster is available at any auto parts store. Spray the PB onto and into the emulsion tube, and take the tube, lay it flat onto a metal base like a vise, and then take a small hammer and tap lightly on the brass tube, where the threads are for the jet. Rotate it while tapping so you get all sides of the tube. This will loosen the threads, without deforming them and allow the PB Blaster to creep into the thread area. after 10 minutes, it should come right out...
Charlie
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1971 CB750K1 (newest bike), 1996 Royal Enfield 500 Bullet (therapy bike), 1981 Yamaha XV920RH, 2006 Kawasaki Concours (retirement bike), 1975 Yamaha RD350 (race bike), 1989 Honda VTR250 Interceptor (race bike), 1986 Kawasaki EX250 Ninja (race bike in progress), 1985 Honda Elite CH250, 1973 Yamaha GT1 80cc, 1974 Yamaha DT360 project bike.

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Offline Stev-o

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Re: Stuck main jet
« Reply #4 on: February 20, 2018, 03:57:46 PM »
I would install new tubes...
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Paintedseat

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Re: Stuck main jet
« Reply #5 on: February 20, 2018, 04:45:09 PM »
Use heat.
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