Stops pulling over 5k

I have a possible lean condition on this bike, but I don't think it is affecting this problem. Bike has good power from idle up to around 5k. From 5k to 8k, it feels like it is going to rattle apart, and it looses all increase in power. It seems like it may be the points, and maybe electronic system may cure problem, but I thought I might ask for advice before investing in electronic system. Any have this issue? and get it fixed?

timing advancer

carbs (main jets)

BTW: what kind of bike is it?

That is most certainly where you would be on the main jets. What mods have been done? What type of carbs, VM or CV?

????????????

In your other posting titled “Hesitation Off Idle” you stated “When I sit at a light, it idles just fine. When I get ready to go from the light, if I just go straight to throttle, it will die. If I tap the throttle first, then takeoff there is no problem. It is apparently a weak point, but I do not know if it is a needle position or a pilot jet problem. Has anyone dealt with this hesitation off idle? How did you fix it?”

In this posting you say “Bike has good power from idle up to around 5k.....”

Folks on this site will try to help you, but that becomes quite difficult if you do not give a complete description of the symptoms of the problem you are experiencing along with the year model of your bike and a list of any modifications (such as pods) that you have made. Ed

Including information about bike year and model is helpful to viewers and usually elicits better responses.
It's easy to put the information in your signature where it shows in all posted messages, past and future.
And may be changed whenever and as often as desired.
If wanting a signature showing information about the bike in posted messages, it's easy to do. Here's how:





Meanwhile, all Harleys are like that. :woohoo:

Good Fortune!

Ed, Point taken. Any ideas on what the problem is? What else would you like to know?

A few things come to mind...

Did this problem just start, or did it happen after some change or event?
Did the bike sit for an extended period of time (more than a couple weeks) prior to the problem starting?
Has the jetting of the carbs been changed from stock?
When was the last time new points & condenser were installed, and was the timing advancer lubed?
Have you checked the ignition timing and operation of the advancer using a timing light and checked the points' condition for pits and the points' gap?

Ed

Please answer the question already asked. Stock Air Filter/ Airbox or Pod's, Maybe another filter like Uni?

650ed wrote: A few things come to mind...

Did this problem just start, or did it happen after some change or event?
Did the bike sit for an extended period of time (more than a couple weeks) prior to the problem starting?
Has the jetting of the carbs been changed from stock?
When was the last time new points & condenser were installed, and was the timing advancer lubed?
Have you checked the ignition timing and operation of the advancer using a timing light and checked the points' condition for pits and the points' gap?

It has been doing it since I bought the bike about 3 months ago.
I don't think it has been sitting since it has been gone through at the dealer.
Haven't checked jetting yet. (what is the standard size for '79 KZ1000ST?)
I haven't done anything with the ignition system, because it was just serviced, and I did not want to get into it if the problem was jetting, or something else. That is why I am asking for advice on where to start.

Has anyone switched out their points for electronic ignition? What did you notice about the change? good? bad?

Motor Head wrote: Please answer the question already asked. Stock Air Filter/ Airbox or Pod's, Maybe another filter like Uni?

Sorry... Standard airbox and filter. Aftermarket 4 into 1 header.

megadub72 wrote:

650ed wrote: A few things come to mind...

Did this problem just start, or did it happen after some change or event?
Did the bike sit for an extended period of time (more than a couple weeks) prior to the problem starting?
Has the jetting of the carbs been changed from stock?
When was the last time new points & condenser were installed, and was the timing advancer lubed?
Have you checked the ignition timing and operation of the advancer using a timing light and checked the points' condition for pits and the points' gap?

It has been doing it since I bought the bike about 3 months ago.
I don't think it has been sitting since it has been gone through at the dealer.
Haven't checked jetting yet. (what is the standard size for '79 KZ1000ST?)
I haven't done anything with the ignition system, because it was just serviced, and I did not want to get into it if the problem was jetting, or something else. That is why I am asking for advice on where to start.

Has anyone switched out their points for electronic ignition? What did you notice about the change? good? bad?

First , get a manual and read it. Your bike has no points. :woohoo:

.

Nebr_Rex wrote:
First , get a manual and read it. Your bike has no points. :woohoo:

.

+1 True regarding the ignition, and EXCELLENT advice regarding the manual! Ed