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Z400b2

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DavidZ1R
Hardcore
Hardcore
Posts: 1513
Joined: 12th Jun 2011
Location: Bolton Lancs

Z400b2

#1 PostAuthor: DavidZ1R » Sun Mar 12, 2023 2:47 pm

Aye up guys, looking for advice on my latest project, engine rebuilt, new rings hone etc, started first time after rebuild. However, revs hang, won't idle at 1000 to 1200 rpm, left carb shows higher pull than right carb, twice as much, checked for air leaks, all seem good, had carbs off and checked, good blue flame on the gunsun , starts ok. When hot, but the starts to climb the revs up to 2300 rpm And hangs, if I hold the throttle tight down it does drop revs but then climbs back. I'm baffled of Bolton. Cables set as per spec. Any thoughts.
CB125 GT380 CB750F1 Z1R GPZ 750 Turbo Z1R

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chrisNI
Site Admin
Posts: 3830
Joined: 22nd Dec 2001
Location: NI

Re: Z400b2

#2 PostAuthor: chrisNI » Sun Mar 12, 2023 10:21 pm

Are they CV carbs?

DavidZ1R
Hardcore
Hardcore
Posts: 1513
Joined: 12th Jun 2011
Location: Bolton Lancs

Re: Z400b2

#3 PostAuthor: DavidZ1R » Mon Mar 13, 2023 9:32 am

Yes, I am mystified
CB125 GT380 CB750F1 Z1R GPZ 750 Turbo Z1R


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