FZRSupport: the FZROnline Archive

well, we have the bike back at last, and going really nicely so far. Cost a packet but worth it to see my boy smiling on his FZR again.. Seems like those O-rings are important parts. Thanks for all the replies here

thanks for the advice. I did replace the fuel filter - but the filter I removed was clean. The mechanic now says there are square 'o' rings under the carbs, and he reckons the bike flooding at idle is caused by fuel being drawn past them... so we're waiting for new 'o' rings from Yamaha Japan! anoth...

well, if anyone's interested, we're finally getting to the end of this saga. The problem isn't a fuel vent blockage - the mechanic showed me if you shake the bike and listen at the cap you can hear the gas hissing out at the cap vent. Bike's been standing over a month now, kid's driving us crazy... ...

thankyou - I'll tell him to quickly take the cap off next time it stalls to see if there's a vacuum built up in the tank. Hope it's this easy...

I've searched the board - didn't find a clear answer to the problem we're having: My boy's stock FZR400 has an issue - it will start fine and take off, but after a few miles will suddenly lose power completely and die. Less than a minute after dying, it will start again, ride off no problem, only to...

thanks mate

where did you get your valve shims? if I'm reading off the right model in my manual, you need a selection of shims to get the valve clearances right?

thankyou for the reply. I think I'll look for a proper tool for the spring - it would be a sin to stuff up such a classic machine with a punch!

as a matter of interest, what mileage did your motor have on it when the valve went? were you riding it hard at the time? I'm a newb on bike motors...

Hello everyone, I just bought my son an 1988 FZR400, after the hub bearings on his 200cc chinese special collapsed. So, I downloaded parts of a service manual for the bike, and it says I must remove the exhaust runners to change the oil filter? Is this really necessary? Also, I see there are resista...