Bogging down with throttle from idle

Motorcycling
1

Hi guys,

The bike has always done this since I’ve had it. It wasn’t too big of a deal in Wales but now with London traffic starting and stopping every minute it’s getting annoying.

I changed the plugs, oil, oil filter, and cleaned the air filter.

It now starts quicker but still bogs down and hesitates under 3k even when hotto .

Any ideas? Also, the bike is getting very hot in lLondon traffic, in Wales I never got past three marks out of 7 on the temperature gauge but now it goes up to 5 and even 6

Zx6r 1998. It’s stock apart from a d&d slip on

2

try a new fuel filter…

bikes always get hotter in london than open roads as you dont have the same amount of cool air flowing between the rad…

i had a simailar problem (bogging) on my bandit… i took the fuel filter off and it was fine…

3

I would add another washer to the needles in the carbs to lift em up smidgen .

4

thanks guys,

I took the airbox and the carb cover off an sprayed carb cleaner into the carbs, no change.

I didn’t strip the carbs for two reasons,

A. I couldn’t figure out how to get them off

B. The bike had brand new carbs in 2011, so I figured that since its had only a few K since then, its not the carbs?

Should I try taking the fuel filter off and give it a try?

I did take off the fuel filter and cleaned it with carb cleaner.

5

You said it’s always done it. So it’s an adjustment issue not a service issue. You only need the carb tops off to shim up the needles.

6

Thanks I’ll give that a try. I’ve also downloaded the service manual it might show me how to get the carbs off.

7

Lightly to be running too rich low down most after market cans cause this if there is a baffel for the can and it is not in fit it
You might get away with taking a washer from under the needles (i.e. weaker)

Most free flowing cans result in slightly rich mixture at low revs and weak at high

8

I would not bother taking off the carbs that would maybe be much more work than actually needed , just lift em tops and shim those needles . Either add a washer or remove a washer and see if I am right and it needs one or Davespanners is right and it needs to lose one . I am saying add one on the grounds that my kawasaki Z range bikes have always needed that after a can or pipe alteration .

9

Thanks fellas.

I managed to strip the carbs and clean the jets. The pilot jets were dirty, after three hours, a lot of guess work, I put it back together. Runs great now, but I think I did something rather stupid, I though since I had the throttle cables off I would lube them, I sprayed some chain lube on the exposed wires, now the throttle is taking ages to come back down :slight_smile:

10

Blocked pilot jets from brand new ? odd … Anyways . Make sure you aint pinched a cable and thats why it aint returning .

11

WD40 is the lube of choice. tell me you didn’t use chain lube! :laugh:

12

I tend to use grease on cables … lasts longer . chain lube is a bit sticky .

13

I did use chain lube, then I remembered its not white grease its more like wax. Bad idea,

Tomorrow ill try force some engine oil down the cable from the top end.

See if that does the trick!

there was some corrosion when you take the carbs off and look down into the chambers, is that normal?

14

Put a supercharger on it
.
.
Pin

15

I’d try a degreaser first the reoil it. However, wait for someone more knowledgable than I to confirm this idea

16

I’d try a degreaser first the reoil it. However, wait for someone more knowledgable than I to confirm this idea