Need mORE KZ650 HELP
- andrew.m.cole
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Need mORE KZ650 HELP
19 Aug 2011 20:16
Ok guys Need some new guidance.
Bike starts fine, runs fine after warming up and rides great.
But.... as you go through the gears and get to say around 55 60mph the bike will sputter a little bit and not gain anymore significant power.
So what are your thoughts?
You can see by my icon pic what ive done to the bike. the air pods have been added which fixed the idle problem. The air screws are turned out 1 turn. Wondering if the problem is Jet related, as in at higher speeds it isnt getting significant amounts of gas to support the load and speed.
Again i need some assistance
Thanx
Bike starts fine, runs fine after warming up and rides great.
But.... as you go through the gears and get to say around 55 60mph the bike will sputter a little bit and not gain anymore significant power.
So what are your thoughts?
You can see by my icon pic what ive done to the bike. the air pods have been added which fixed the idle problem. The air screws are turned out 1 turn. Wondering if the problem is Jet related, as in at higher speeds it isnt getting significant amounts of gas to support the load and speed.
Again i need some assistance
Thanx
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- Patton
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Re: Need mORE KZ650 HELP
20 Aug 2011 01:23andrew.m.cole wrote: Ok guys Need some new guidance.
Bike starts fine, runs fine after warming up and rides great.
But.... as you go through the gears and get to say around 55 60mph the bike will sputter a little bit and not gain anymore significant power.
So what are your thoughts?
You can see by my icon pic what ive done to the bike. the air pods have been added which fixed the idle problem. The air screws are turned out 1 turn. Wondering if the problem is Jet related, as in at higher speeds it isnt getting significant amounts of gas to support the load and speed.
Again i need some assistance
Thanx
If not already done, would assure proper functioning of the timing advancer, and also assure that valve clearances are within specs.
Good Fortune!

1973 Z1
KZ900 LTD
KZ900 LTD
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- ltdrider
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Re: Need mORE KZ650 HELP
20 Aug 2011 09:18
Might be a fuel restriction. Is there an in-line filter from the tank to the carbs? Might need to be replaced.
'76 KZ900 LTD (Blaze)
'96 Voyager XII (Dark Star)
'79 KZ650 Cafe Project (Dirty Kurt)
Greensboro, NC
'96 Voyager XII (Dark Star)
'79 KZ650 Cafe Project (Dirty Kurt)
Greensboro, NC
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- wireman
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Re: Need mORE KZ650 HELP
20 Aug 2011 09:21
have you rejetted for the pods/pipe? more air coming and going needs more fuel to go with it

posting from deep under a non-descript barn in an undisclosed location southwest of Omaha.
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- andrew.m.cole
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Re: Need mORE KZ650 HELP
20 Aug 2011 11:08
New inline filter already
Stock jets at this time
Has 4 into 1 with Vance Hines muffler.
What sizes of jets do I need to start with?
Cleaned carbs havnt checked valve lash yet.
Stock jets at this time
Has 4 into 1 with Vance Hines muffler.
What sizes of jets do I need to start with?
Cleaned carbs havnt checked valve lash yet.
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- Marneman
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Re: Need mORE KZ650 HELP
20 Aug 2011 22:06
I have attached a chart of sorts that describe some good jetting rules of thumb.
In your case as described go up 3 main jet sizes and one pilot jet size according to the chart.
Good luck man. Nice bike BTW
In your case as described go up 3 main jet sizes and one pilot jet size according to the chart.
Good luck man. Nice bike BTW

77 KZ1000-A1 "Bushido" Project
82 KZ1000 LTD "Terri Lee"
You know what, I don't have a one to some other number of douche-bag scale. So.. Six!
82 KZ1000 LTD "Terri Lee"
You know what, I don't have a one to some other number of douche-bag scale. So.. Six!
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- martin_csr
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Last edit: 22 Jan 2013 04:55 by martin_csr.
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- andrew.m.cole
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Re: Need mORE KZ650 HELP
21 Aug 2011 22:27
Allllright guys thanks for the comments and guidance.
Will look at the timing adjustment and points etc tomorrow.
Fuel Filter is new, clear and fuel is flowing thru nicely. Ordered from Z1.
Will order some new jets tonight and try a couple combinations.
Will report back when complete.
Need to get this bad boy done so i can start the 78 kz650 sitting in the shed.
Will look at the timing adjustment and points etc tomorrow.
Fuel Filter is new, clear and fuel is flowing thru nicely. Ordered from Z1.
Will order some new jets tonight and try a couple combinations.
Will report back when complete.
Need to get this bad boy done so i can start the 78 kz650 sitting in the shed.
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