Bikes, Hints'n'Tips > FZS600 Fazer
Carb clean
SpiceWeasel:
Hi all, long time lurker. Just thought I would say hello and show you some dirty photos :lol
I went to start the old girl up the other week as last time she wasn't to happy so I put this down to old fuel in the tank, not used it in a year but had a few starts and left running. Put some new petrol in the tank and long story short petrol was leaking down the stand. Would only run on 3 briefly if you tried to start with a bit of throttle.
So I managed to get the carbs off today as I reckon one of the floats is stuck. First thing I found was one of the breather/fuel return pipes on underside of the tank is blocked with crusty rubbish...also a bit in the hose. Other side is clear. Then when moving the air box back there was still some petrol in there and the K&N filter stunk of petrol. So got that out and give that a clean as well.
Getting the carbs off was "fun" but got there in the end, I think putting them back might be more tricky. Anyway as I had been breathing in petrol fumes all afternoon I just had a quick look at two of the carbs....well gunked up and float was stuck on drivers side. Nearside float moved but was sticky. Looks to be long overdue a good clean looking at the state of the internals.
I put a few photos up so you can see.
Just wondering who you use for spares? Dealers... can be expensive. Just found Yamparts and Wemoto after aquick google, good prices but not OEM bits generally.
The dirty photos :lol
Trebus:
Water in the fuel by the looks, almost certainly as a consequence of ethanol absorbing H2O.
Normal recommended action is to replace o-rings but leave the original float valves unless they’re knackered. Clean up and back together.
FazThou:
I just ordered these for mine along with new oil and filter and new spark plugs so hoping to give the old girl a bit of a freshen up very soon
4 X Yamaha FZS1000 FZ1 2001-2005 Carb Carburettor Repair Kit + Diaphragm | eBay
SpiceWeasel:
Thank for replies :)
Just quick update: No wonder the old girl wasn't happy looking at the state of the carbs.
Took the carbs apart and everything was completely covered in green gunk and that hard to shift varnish type substance. The jets were mostly blocked, gave everything a good clean with carb cleaner then took it to my parents next door neighbour to put the bits from float bowl and jet needle side etc in his ultrasonic cleaner. We did this one carb at a time so not to mix up parts. Not sure how but managed to lose the small spring that goes on top of the jet needle. Can't find spares so had to rob a spring from a biro pen and cut down to size, it only holds the needle in place so it doesn't move.
After ultrasonic cleaning everything had a good gong over with carb cleaner and a toothbrush, and the jets were cleaned out with proper jet cleaning files.... different diameter metal rods. Amazing how much green gunge came out the little holes. The carbs were cleaned with some "gunk" and a toothbrush then had a good going over with carb cleaner.
Just ordered some new float bowl gaskets and a fuel filter so all the bits are in seperate labelled up tubs. My dad had the other seals, good job as they were knackered as well. Rock hard and starting to split. Hopefully once it all goes back together and I clean the tank breather hole out it should run alot better. I don't have a carb balancer so will have to see how it is after, might have to go to the bike shop for that if needed. I know you can buy cheap balancers but not sure if they are very accurate.
Next door neighbour who fixes up lawnmowers and anything with an engine said he has never had so many issues with carbs since they went to ethanol mix fuel. He basically said if you use standrad fuel then use a fuel treatment with every tank, and if not going to be running for more than a month or two put high octane petrol in the tank first. I think Esso go faster juice is supposed to have no/minimal ethanol in it.
Trebus:
Good job. Just be aware, if you changed the o-rings then unless they are Viton material they will likely be destroyed by the ethanol unfortunately.
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