Fazer Owners Club - Unofficial

Bikes, Hints'n'Tips => FZS600 Fazer => Topic started by: motodevcam on 07 January 2018, 05:03:49 PM

Title: Over fueling "pop pop pop"
Post by: motodevcam on 07 January 2018, 05:03:49 PM
Hi All,

After a group ride this afternoon, guys behind me all said the fazer is overfueling. Said they could smell it strongly and of course bike is really poppy on deceleration. K and N filter, Micron full system. (See pic) Recent carb balance.

Not sure if a previous owner has been fannying about with the mixture or wether just dirty carb issuses. Bike was sat for a couple of years until I bought it last year. Plan to remove the carbs, strip and clean in the next few weeks anyway. I did wonder if it was just symptomatic of the full micron system on there?

Any musings would be appreciated!

Cheers
Title: Re: Over fueling "pop pop pop"
Post by: Disorderlypunk on 07 January 2018, 09:27:02 PM
as your going in there then just wait and check everything
standard jets are 115 across the board
if its over fueling then my first guess would be float heights which is enough to check with a piece of pipe and a small ruler
i think is about 4.5mm above carb bowl lip (pre 2000) and 3.5mm (2000 onwards)


get yourself some m4 10mm (i think) full thread cap screws you will want 16 of them and you can replace the shitty screws that hold the bowls to the carbs - for a couple of quid its better to have them and not need them than to need them and not have them and it makes life so much easier in the future
Title: Re: Over fueling "pop pop pop"
Post by: motodevcam on 08 January 2018, 09:52:05 PM
That's great :) thank you for the advice :) eqger to gdt in there and sort it!!
Title: Re: Over fueling "pop pop pop"
Post by: ponkster on 09 January 2018, 03:13:39 PM
Personally if the only problem is popping on over run and the bike is running well I would live it alone.

In my opinion many fazer riders have never cracked open the carbs and unless you have evidence to the contrary I would doubt anyone has changed the jets.

The nose of someone riding behind you is not a good measure of a bikes fuelling - a better measure would be the condition of the plugs and if the bike is running crap !

Aftermarket pipes  often cause bikes to pop on over run , this can be exacerbated by air leaks in the exhaust system.

Feel free to tell me I'm talking shite and totally disregard my advice .
Title: Re: Over fueling "pop pop pop"
Post by: BBROWN1664 on 09 January 2018, 03:17:31 PM
:agree
Title: Re: Over fueling "pop pop pop"
Post by: mogster on 10 January 2018, 07:32:45 PM
i had the same at one point this maybe the beginnings of the tps problems worth a check perodicly
cos they is sneaky
Title: Re: Over fueling "pop pop pop"
Post by: Disorderlypunk on 11 January 2018, 01:51:35 AM
how black is your exhaust tip ??????
shut garage door and start her up if you can smell it and your eyes are watering its a bit rich
if you collapse and die without noticing a petrol smell then it is fine but you stayed in the garage too long
--WARNING -- i do not advise collapsing and dying


you would be surprised how often we have figured one of our classic cars is rich by simply standing at the back of it
i so wish i was joking but i dont want to live in a nursing home so i will happily shorten it by sniffing exhausts :rolleyes
Title: Re: Over fueling "pop pop pop"
Post by: Jules-C on 11 January 2018, 09:15:19 AM
Carbon monoxide detector in garage is handy for those I'll just fire the bike up for a second occasions and then keep it running longer than intended.

Exhaust smell can be misleading since higher octane fuels give a funny smell on the Fazer possibly because it will run richer on them since they need more air.
Title: Re: Over fueling "pop pop pop"
Post by: fazersharp on 11 January 2018, 09:39:36 AM

if you collapse and die without noticing a petrol smell then it is fine but you stayed in the garage too long
--WARNING -- i do not advise collapsing and dying

:lol :lol
Title: Re: Over fueling "pop pop pop"
Post by: motodevcam on 11 January 2018, 05:41:06 PM
I'll whip a plug off and have a look. Without sounding intentionally stupid this is the only bike I've ever ridden (with the exception of of the schools diversion) so I don't really have a bench mark for what "running well" is.

It doesn't like starting when it's already warm if that's worth anything? Exhaust always smell rotten to me. Like mouldy grass haha
Title: Re: Over fueling "pop pop pop"
Post by: BBROWN1664 on 11 January 2018, 06:06:48 PM
It sounds like it could just do with a dam good service. Get it booked into a local place and let them give it a good going over.
Title: Re: Over fueling "pop pop pop"
Post by: YamFazFan on 12 January 2018, 11:52:15 PM
Are you're friends riding newer bikes which had to comply from production with the more recent emissions legislation? (catalytic converters etc...)

It could be that they're not used to the richer exhaust smell from a bike that was manufactured previous to that.



Title: Re: Over fueling "pop pop pop"
Post by: darrsi on 13 January 2018, 12:29:31 AM
I have zero sense of smell.  :look


Sounds like a carb balance wouldn't go amiss.
Title: Re: Over fueling "pop pop pop"
Post by: Disorderlypunk on 13 January 2018, 01:29:41 AM
as much as i like to take a ride to help someone out i dont think devon/cornwall is within my area of 'reasonable distance' to come have a look lol
(cornish liberation army might have my head off)
Title: Re: Over fueling "pop pop pop"
Post by: fazersharp on 13 January 2018, 12:48:45 PM
The bike is clearly running perfect because everyone else was smelling your exhaust meaning they were behind YOU
Title: Re: Over fueling "pop pop pop"
Post by: daviee on 13 January 2018, 03:12:32 PM
poping on overrun is not a indication its rich its an indication that unburnt fuel is igniting int the exhaust witch means their is an air leak  and more than likely it will be the drain hole that lets moisture out this is a carbed bike so this is normal as it will still draw fuel on over run where ass injection bikes dont so less chance of poping . mine does it and is fuelled perfect as it was checked on the dyno so nothing to worry about if it was over fuelling it would not run clean and would be woolly feeling like you have left the choke on 
Title: Re: Over fueling "pop pop pop"
Post by: motodevcam on 21 January 2018, 12:29:57 PM
Haha yeah main one on a Diavel!!
Title: Re: Over fueling "pop pop pop"
Post by: motodevcam on 21 January 2018, 12:32:46 PM
Are you're friends riding newer bikes which had to comply from production with the more recent emissions legislation? (catalytic converters etc...)

It could be that they're not used to the richer exhaust smell from a bike that was manufactured previous to that.

Above intended to quote this post. Sorry. Miss feel free to tidy up ha ha
Title: Re: Over fueling "pop pop pop"
Post by: Bretty on 25 January 2018, 11:40:37 PM
My bike used to crackle and pop a lot when I put a scorpion can on. But calmed down loads after a carb balance.

It surprises me how frequently people recommend stripping carbs. For something to block a jet it has to pass through your fuel filter!! (or air filter?) I've removed and serviced my carbs twice on the advice of people on forums. Both times the issue was caused by something else and both times the inside of my carbs were spotless!! In my experience 9 times out of 10 misfires are caused by something else.
Title: Re: Over fueling "pop pop pop"
Post by: daviee on 26 January 2018, 05:07:42 PM
i used to work on a rolling road and carb bike always pop and show flames but most times you dont see or hear it as you are infront of it when you are riding it nothing to worry about
Title: Re: Over fueling "pop pop pop"
Post by: motodevcam on 04 February 2018, 06:27:02 PM
Bit of an update. Decided that the carbs did need to come off as:coolant hoses all needed replacing, bike sat for 3 years before I had it and several little idle/running issues including running rich. (Pipe is black and sooty)

Carbs are off. Cleaning one at a time. Have an ultrasonic cleaner so going in there. Pilot jet on n01 carb blocked. Pretty clean other than that. No.2 float bowl full of crap. Looking forward to no3 as when I emptied the float bowls only a dribble came out of That!!

Interesting, there is a jet in each carb not mentioned in the haynes manual. After spending an age trying to unblock the jet with carb cleaner (and looking on here) I discovered that it's a blank?!! Bizarre!!

Anyway. Few pics
(http://img.photobucket.com/albums/v699/litwardle/20180204_155527_zpsepzjsqb8.jpg) (http://smg.photobucket.com/user/litwardle/media/20180204_155527_zpsepzjsqb8.jpg.html)(http://img.photobucket.com/albums/v699/litwardle/20180204_155257_zps6wlfk0wx.jpg) (http://smg.photobucket.com/user/litwardle/media/20180204_155257_zps6wlfk0wx.jpg.html)
Title: Re: Over fueling "pop pop pop"
Post by: Bretty on 04 February 2018, 06:34:59 PM
No mate, it has got a hole in it. It must be blocked. Just persevere with it! 😂😉😜
Title: Re: Over fueling "pop pop pop"
Post by: motodevcam on 04 February 2018, 07:05:10 PM
Well that's what I thought lol but reading the following thread: http://foc-u.co.uk/index.php?topic=23023.0 (http://foc-u.co.uk/index.php?topic=23023.0) would suggest not...

Not sure what it's for if it's Not? Identified the main jet, needle jet and the pilot jet...whats this one then? Lol my head hurts.
Title: Re: Over fueling "pop pop pop"
Post by: bandit on 04 February 2018, 09:18:30 PM
It's another main jet.(http://foc-u.co.uk/Smileys/efocicon/smile.gif)
Title: Re: Over fueling "pop pop pop"
Post by: Disorderlypunk on 04 February 2018, 11:23:15 PM
ok so a quick look around turns out the blanked one would be a startup/enrichening jet
originally found this out looking at pics of a mikuni bsr36 (we have bsr33 so close enough)
that says choke to me so i got more intrested because its blanked off
found this http://www.xj4ever.com/inside%20your%20carbs.pdf (http://www.xj4ever.com/inside%20your%20carbs.pdf)
and i can say i have no bloody idea further than its blanked off now so it can stay blanked off
Title: Re: Over fueling "pop pop pop"
Post by: unfazed on 04 February 2018, 11:23:42 PM
It is a blank, dont do anything to it. These are mikuni carbs and the bodies are used on other bikes not just the fazer, the jet is not required on the fazer and left blank.