Have you always run the BP7ES which is the coldest plug (equivalent to the Bosch W5DC)? I tend to run the W6DC plug in my R100/7, which is one step hotter. I think either will work fine...it could have an impact on the plug color as well.
Kurt -- Forum Administrator ---> Resources and Links Thread <---
'78 R100/7 & '69 R69S & '52 R25/2
mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!
As one other poster does, I only open the left petcock when riding so one filter feeds both carbs until that side of tank goes empty. Then I open right side. When that side goes empty, I put both petcocks on reserve. This way, I kind of get a double warning about low gas level.
All of this to show that a clean in-line filter will flow plenty of fuel to BOTH carbs. Key is to replace them regularly - perhaps once per year.
"An ounce of prevention is worth a pound of cure"
So . . . what was the final outcome? Were your old fuel line filters, in fact, the problem, presumably because they were plugged?
If so, that is a sign that the filters do, indeed, need installed. If they hadn't stopped that dirt the carbs probably would have, or worse, the engine itself would have sucked it all in.
I am a believer in prevention and will continue to use the inline filters until someone can prove they are detrimental.
Thanks again to everyone that contributed to this thread.
Attitude is everything!
08' V-Strom 650 great light weight tourer
I have them on my BMW R100 with no problems. I think that the filtering material would not be susceptible to the water-in-gas issue as the paper apparently was. Also, when I was a buyer for one of the largest plastic molding companies (that you have heard of), we used the sintered bronze filter quite a bit.
Just a suggestion in case you want to experiment with another type the next time you are thinking of changing.
This difference would be a good comparison for someone to run an experiment to see which one performs better.
Whatever, either type, if one takes them apart, and they do catch dirt (or water) then that is the proof that they do work.
I still doubt the suggestion that water was the problem with yours. One thing I don't understand is how both filters plugged at the same time. I, too, usually run left side alone until I am out on that side, then open up right side. Start looking for gas station, and if necessary, I put both sides on reserve. Using this method, the left bears most of the burden of filtering as it is used the most time. If any would plug up, I would think that the left would go far earlier than the right side.
One thing I do from time to time is when I have to disconnect the fuel lines, I always run a small amount (about 1/4 cup) out of each petcock from the tank, but before the filters. This would allow any sediment that might be lying low and that could get through to go into the cup.
I also, from time to time, check each of the float bowls - easy to check for dirt and sediment.