So I have been having trouble with the trusty clear fuel filters from supercheap. I had them fitted to both my R6 and my bandit, which I sold a while ago. R6 was starving for fuel when hot and struggling to start when hot. Checked the filter and could not easily blow through it. Replaced it with a new one from work - no more problems. The bloke who bought my bandit also had trouble, it stopped running on the M5 and he had to have the bike towed. Wouldn't start at all. I found the fuel filter in the same condition as it was the first thing I checked after having trouble with the R6, also replaced it and problem is gone. So I am going to rescind my recommendation on the super cheap fuel filters... I don't trust the really tiny inline ones most bike shops have. Bigger is better in my view, the new ones I used from work are OEM replacement types, I will try to get a link, on my mobile posting this.
This is the type of filter I fitted to replace the super cheap ones https://www.ebay.com/itm/OEM-YAMAHA-FUEL-GAS-FILTER-1999-2002-YZF-R6-YZFR6-1997-2007-YZF600R-600R-600-R/201699594417?epid=1068492552&hash=item2ef63b90b1:g:KvcAAOSw~otWevVu&fits=Year:1999|Model:YZF+R6|Make:Yamaha
Yeah i had trouble with my FZR revving when using the supercheap ryco filter and another style too. I bought these off ebay, they look to be the same size (8mm barb's) and quality etc as the original's but are much cheaper, 5x for $12 AU inc delivery https://www.ebay.com/itm/5x-Fuel-Fi...515360?hash=item3d49675b20:g:ir0AAOSw-9xZxhQY
I'm guessing the difference is that ones which don't work after a period of time have a paper filtration element and the others look to have a brass filtration element - correct? Guessing that because the FZR's run such low fuel pressure that once the paper element is wet it just becomes a restrictor or sorts I don't know if anyone remembers high school chemistry and putting something through filter paper, that made watching grass grow look like and action sport - similar principle applies
I just cut up my original fuel filter out of interest, i could just see line's through it so thought i'd investigate it a bit more I'm only assuming it's the original one fitted by Yamaha I think these filter's last longer due to having a bigger filtration area New filter v's old filter Old filter pulled apart, i flushed and back flushed this old filter using Threebond Super Engine Conditioner then blew it out with a compressor a long time ago, it got a lot of crap out, look's pretty clean And it's a paper element
You could alway's do a side by side test to see if the fuel pump flow's less without the filter, run the pump for 30 second's and measure the fuel output, then fit the filter and run the pump for 30 second's and compare the 2.
That's a great suggestion as that would then allow you to determine if the restriction is enough to shut the pump off prematurely
