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+--- Thread: HT leads FZS1000 (/showthread.php?tid=83751)
HT leads FZS1000 - Trebus - 29-03-25
I probably know the answer already but thought work checking.
Do the HT leads push in or screw out of the coils? Or more likely moulded in and therefore non replaceable?
FZS1000.
Cheers
RE: HT leads FZS1000 - Falcon 269 - 30-03-25
They screw in.
It's worth trimming 1cm off the lead to get back to fresh core if you have any ignition issues.
RE: HT leads FZS1000 - Trebus - 30-03-25
Thanks Falcon.
Still got an intermittent misfire around 4k.
You did the slip on Ivan’s in this bike when my Dad owned it in around 2010. I’ve pulled them recently and they were spotless but the o-rings had deteriorated, all changed with Viton now.
EXUP is good, TPS I’m reasonably sure is good, carbs are balanced, all wiring been through to eliminate bad connections, plug caps stripped and test out fine, plugs are good but put a set of old ones in and no change.
I knew the leads could be trimmed back but they’re a bit short now so plan to replace them now I know they screw out of the coils.
RE: HT leads FZS1000 - unfazed - 31-03-25
1998-1999 Carburettor type R1 have the same plug caps as the FZS1000. It is unlikely the caps would cause an intermittant misfire as a specific rpm, I have found that problematic caps will cuse regular misfires expically on start up. Did you check the connections of the Ignitor.
A faulty TPS can cause surging at revs around tthe 3000 to 5000 mark as if you were on and off the throttle lightly. Just uploaded file to downloads section. The fault has been mistaken for a misfire, by a few fellows I know with R1s
RE: HT leads FZS1000 - Trebus - 31-03-25
Thanks Unfazed, guess we’ll need to wait for admin approval on the download as currently can’t see it.
I’d somewhat suspected TPS but my continuity checks appeared to rule it out. Igniter connections, can’t quite remember so will check.
RE: HT leads FZS1000 - unfazed - 31-03-25
(31-03-25, 06:02 PM)Trebus Wrote: Thanks Unfazed, guess we’ll need to wait for admin approval on the download as currently can’t see it.
I’d somewhat suspected TPS but my continuity checks appeared to rule it out. Igniter connections, can’t quite remember so will check.
How did you do the continunity checks of the TPS? Did you do a rotation test on it?
The Tachometer error codes are not foolproof as they only react to three conditions Disconnected, Short Circuit or Locked in position.
Ufortunately they fail due to wear which causes the TPS to disconnect and reconnect quickly internally at certain rotation, but the ignitor reacts by changing the timing suddenly thus causing the surging. The disconnection of the TPS tracks are to short for the Tachometer error codes to show.
Since your bike is Ivanised and if it is surging then it would be caused by a failing TPS.
RE: HT leads FZS1000 - Trebus - 01-04-25
I did static and a rotation test, the latter on the bike.
The rotation test seemed to give a linear result but it’s not the easiest test doing it manually. As a consequence I’d pretty much ruled it out as a failure.
Maybe I should get another one and give it a try.
RE: HT leads FZS1000 - Trebus - 16-04-25
Had a short run last week down to MOT and bike was OK.
Nevertheless I bit the bullet and ordered a Suzuki TPS. Looks as though the part number has been superseded and is now 13580-21F01. Got a very good price direct from Japan, Fowlers are on back order. Let’s see if it turns up and how it goes.
RE: HT leads FZS1000 - unfazed - 18-04-25
My Suzuki TPS 13480-21F01 the superceded version arrived today (I ordered two as my Serow takes the same TPS as the FZS1000) and will be fitting the one to the 1000 tomorrow. I will photograph how I change the wires and how I test them.
RE: HT leads FZS1000 - Trebus - 18-04-25
Thanks Unfazed.
My Fazer is MOT’d up, took it out for almost 100 miles and it’s running flawlessly! Problem will be back I’m sure.
New TPS has been despatched.
RE: HT leads FZS1000 - Trebus - 22-04-25
£46 delivered from Webike, Japan.
RE: HT leads FZS1000 - unfazed - 22-04-25
(22-04-25, 05:22 PM)Trebus Wrote: £46 delivered from Webike, Japan.
I got the two Suzuki TPS sensors I ordered 2 weeks ago on Friday and mosified and fitted one yesterday. The other I will fit to the Serow later.
I Test the TPS on the bike with the Throttle and the pins of the TPS connected to a Meter on the Ohm scale with a little test cable I made up specifically for this purpose. (If meter is not auto ranging set it to the K Ohm scale)
The meter drops out around 1.9kOhms and returns again at 2.2kOhms on mine, but coud also happen higher up the range
You just need to swap the Black and blue wires in the connector. I have uploaded a pdf file on how to do it.
It would not attach the Mp4 file, I will try to upload it to the downloads section
RE: HT leads FZS1000 - Trebus - 28-04-25
Issue has returned! Will be getting the new TPS wiring sorted and fitted this week. Thanks unfazed for the advice.
RE: HT leads FZS1000 - Trebus - 30-04-25
Well TPS is now replaced and thought all good but after 15 miles the misfire returned. I went out at the weekend too, behaviour similar with a below 2k RPM problem but only after riding for 20 mins or so.
So managed to do some tests while everything was warm and turns out I’ve got a high resistance plug cap. Happy I’ve found something although I’d gone through the coils / caps a few months ago and they checked out fine. Seems like it’s a heat related issue.
Anyway I’ve cleaned up the caps, changed resistors as I had some old spares and hopefully will be some progess. Just got to get it back together and test when time allows.