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  #1  
Old 13th November 2017, 02:28 PM
menapia dude menapia dude is online now
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Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default spluttering below 2k revs

folks have an 82 katana 1100 starting and running good but up to 2k revs she has a bit of a splutter then when reach 3 to 4 k she perfect,rather than pulling off the carbs is there anything i can put in the tank to try clean the jets out ?
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  #2  
Old 13th November 2017, 02:52 PM
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Legion Legion is offline
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Biker.ie Member No. 2029 from Donegal
14,987 posts since Jul 2005
Motorbike: TLR, FJ, XS650, TZR125
Modifications: Hatchet Holster
Default Re: spluttering below 2k revs

Dipetane or redex might do something. Worth a try if it saves pulling the carbs out.
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  #3  
Old 13th November 2017, 02:54 PM
menapia dude menapia dude is online now
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Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by Legion
Dipetane or redex might do something. Worth a try if it saves pulling the carbs out.
thanks mate was thinking that too
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  #4  
Old 13th November 2017, 03:00 PM
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Gixxer Gixxer is offline
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11,433 posts since Nov 2009
Motorbike: NSU Quickly
Modifications: Lobotomy
Default Re: spluttering below 2k revs

Are the carbs balanced?
Check the rubbers for cracks too.
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  #5  
Old 13th November 2017, 03:03 PM
menapia dude menapia dude is online now
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Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by Gixxer
Are the carbs balanced?
Check the rubbers for cracks too.
new rubbers carbs fully rebuilt
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  #6  
Old 13th November 2017, 03:06 PM
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Gixxer Gixxer is offline
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Motorbike: NSU Quickly
Modifications: Lobotomy
Default Re: spluttering below 2k revs

Were the carbs balanced though when they were refitted?
Is the battery OK in it? They can run a bit shit at low revs if the battery is low.
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  #7  
Old 13th November 2017, 03:10 PM
menapia dude menapia dude is online now
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Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

new motobatt hi output battery,carbs were fully balanced she will tick over perfect even at 500 revs it clears itself after 3k revs
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  #8  
Old 13th November 2017, 04:26 PM
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allsorts&oddjobs allsorts&oddjobs is offline
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Biker.ie Member No. 9980 from west limerick
7,899 posts since May 2008
Motorbike: Heaps, in both senses
Modifications: Tyres, when necessary onl
Default Re: spluttering below 2k revs

hiya Brian, Wurth have a very good carb cleaner, cant think of the name of it but youd find it on their site, only one I ever came across that actually works, just add to the tank and go for a spin.

only other thing id try is changing the fuel in the tank if it was in it for a while, some of the shit they sell as petrol goes stale fairly fast.
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  #9  
Old 13th November 2017, 04:30 PM
menapia dude menapia dude is online now
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Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by allsorts&oddjobs
hiya Brian, Wurth have a very good carb cleaner, cant think of the name of it but youd find it on their site, only one I ever came across that actually works, just add to the tank and go for a spin.

only other thing id try is changing the fuel in the tank if it was in it for a while, some of the shit they sell as petrol goes stale fairly fast.
well mate hows things did ya ever finish that z lol, i changed the fuel bought texaco will buy the wurth carb cleaner now thanks mate
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  #10  
Old 13th November 2017, 05:43 PM
Blanka Blanka is offline
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Default Re: spluttering below 2k revs

the plug caps could be arcing to the head. it would be made worse if the bike is wet. try starting it in the dark and look for arcing.
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  #11  
Old 13th November 2017, 06:10 PM
menapia dude menapia dude is online now
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Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by Blanka
the plug caps could be arcing to the head. it would be made worse if the bike is wet. try starting it in the dark and look for arcing.
new dyna coils leads and plugs mate
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  #12  
Old 13th November 2017, 07:17 PM
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allsorts&oddjobs allsorts&oddjobs is offline
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Biker.ie Member No. 9980 from west limerick
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Motorbike: Heaps, in both senses
Modifications: Tyres, when necessary onl
Default Re: spluttering below 2k revs

Originally Posted by menapia dude
well mate hows things did ya ever finish that z lol, i changed the fuel bought texaco will buy the wurth carb cleaner now thanks mate
at it as we speak Brian, engine is out and being blanked off in prep for cleaning/blasting, slow pace but will get there

best of luck with the carb issue, if all else fails i'll happily take it off your hands
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  #13  
Old 13th November 2017, 08:19 PM
faz1 faz1 is offline
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Biker.ie Member No. 15104 from Meath
928 posts since Mar 2009
Motorbike: fz1, 34-26-35
Modifications: none
Default Re: spluttering below 2k revs

take a/f out, squirt carb cleaner into each intake start bike and try and block/put your hand over each intake whilst revving it in turn. You should feel the suction on yer hand and then pull hand away quickly as you are revving it. It has the effect of pulling any crap out of jets. Worth a try.... repeat and don't be shy with the carb cleaner.

Btw, I assume you have a clean/correct a/f in it...
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  #14  
Old 13th November 2017, 08:20 PM
faz1 faz1 is offline
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Biker.ie Member No. 15104 from Meath
928 posts since Mar 2009
Motorbike: fz1, 34-26-35
Modifications: none
Default Re: spluttering below 2k revs

oh and there's another thing worth checking - don't they have a vacuum petcock? make sure the vac line in't the problem by turning it to pri
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  #15  
Old 13th November 2017, 08:38 PM
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Frisco Frisco is online now
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Biker.ie Member No. 32483 from Meath
1,535 posts since Dec 2013
Motorbike: Hornet 6
Default Re: spluttering below 2k revs

Check the voltage with it running too, a bad reg can do that too
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  #16  
Old 17th November 2017, 03:31 AM
faz1 faz1 is offline
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Biker.ie Member No. 15104 from Meath
928 posts since Mar 2009
Motorbike: fz1, 34-26-35
Modifications: none
Default Re: spluttering below 2k revs

how did you get on?
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  #17  
Old 17th November 2017, 10:08 AM
menapia dude menapia dude is online now
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Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by faz1
how did you get on?
still waiting on the wurth carb cleaner from ebay,as for all the other stuff it is all new,

regulator
battery,plugs,dyna coils,petcock,air filters,this bike was 110% restored with all genuine parts where possible

i should have the carb cleaner today or monday hopefully and then will try it and take it from there thanks for all the help so far
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  #18  
Old 17th November 2017, 10:08 AM
menapia dude menapia dude is online now
MotoGP Legend
Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by Frisco
Check the voltage with it running too, a bad reg can do that too
voltage is perfect thanks
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  #19  
Old 17th November 2017, 10:11 AM
menapia dude menapia dude is online now
MotoGP Legend
Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 10718 from wexford
1,609 posts since Jun 2008
Motorbike: few bits n bobs
Modifications: few
Default Re: spluttering below 2k revs

Originally Posted by faz1
take a/f out, squirt carb cleaner into each intake start bike and try and block/put your hand over each intake whilst revving it in turn. You should feel the suction on yer hand and then pull hand away quickly as you are revving it. It has the effect of pulling any crap out of jets. Worth a try.... repeat and don't be shy with the carb cleaner.

Btw, I assume you have a clean/correct a/f in it...
air filter brand new original,im going to try wurth cleaner in tank first as pulling the carbs is a bitch of a job,will keep u posted
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  #20  
Old 18th November 2017, 12:03 AM
faz1 faz1 is offline
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Biker.ie Member No. 15104 from Meath
928 posts since Mar 2009
Motorbike: fz1, 34-26-35
Modifications: none
Default Re: spluttering below 2k revs

Good luck!
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