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Moving on to problem # 2. 4 weeks 23 hours ago #32614

  • kawaBCN
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Try disassembling and cleaning the carburetors, follow the SCOTCH tutorial, he is a true eminence on this topic.

CARB REBUILD BY SCOTCH

I ended up buying a repair kit, it didn't cost me much money.

DAMINEDING KIT
 
RUN LIKE THE WIND¡¡¡
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Moving on to problem # 2. 4 weeks 21 hours ago #32615

  • scotch
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These kits appear to the "generics" sold on EBay and if they're the ones stated as being made in Taiwan, you're good to go !  I've been using them for years in many carb-sets I have rebuilt and they are GOOD !
Although ''79 carb rebuild" article is outdated in some details the premise is clear.  CLEAN, CLEAN, CLEAN !

I don't have anywhere near enough info about your bike so won't make any efforts to advise over and above what's already been posted, at this time.
1980 KZ 1300 sr# KZT30A-009997
Always High - Know Fear !

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Moving on to problem # 2. 4 weeks 5 hours ago #32618

  • kawaBCN
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I just took it for another ride. ....
 Cylinders 1-2 and 5-6 sizzled. Cylinders 3-4 didn't.
Suggestions?




 
It occurred to me that...

Before removing the carburetors, when you ride your motorcycle and you notice that the engine only works with four cylinders...

Remove a cap from the spark plugs of cylinders three or four and with the engine running, place a replacement spark plug and check for spark.

If there is no spark, your problem is electronic, not carburetion.
RUN LIKE THE WIND¡¡¡
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Moving on to problem # 2. 4 weeks 4 hours ago #32619

  • Ted
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Good point.  Cutting out at highway speed when it gets hot... it could easily be a coil going bad. 
1981 KZ1300, '98 Suzuki GSF1200S, '80 Honda CT110, '11 Honda CBR250, '75 Honda CL360, '00 Honda XR100R
Speak softly and mount a fast bike.

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Moving on to problem # 2. 3 weeks 5 days ago #32622

  • BigSix
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check the spark-plugs by switching them and check the spark-plus wires.
Holger
Z1300 A1/ KZT30AG built 1979
frame KZT30A 004285
engine KZT30A 000288
location: borderland-triangle France/ Germany/ Switzerland, Europe
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Moving on to problem # 2. 3 weeks 5 days ago #32626

  • giorgi3
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I rode it around two times today. About a 10 mile loop each time. Strangely enough, I didn't have any issues. The only things I changed was I gassed up with 93 Octane yesterday, and I took the side car off the Kz1300. 

I ran it up to 6-7k RPM a number of times. Also drove at for several minutes on each leg using various slow speeds, mid-speeds, and high speeds. No issues. Oh well, I'm not going to change anything unless the problem resurfaces.

Thanks for all the suggestions.

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