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Thread: Fuel filter ? 78' R100/7

  1. #31
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    Quote Originally Posted by godfather View Post
    Here is a follow up....Today I was able to get out for a 15 mile ride. Everything seems to be ok. The fuel filters filled and stayed that way. The bike ran strong throughout the rpm range...actually I am impressed at how strong it pulls from 5000 to 6000 rpm's in 3rd gear.

    The last two miles I ran at 4000 rpm, pulled in the clutch, hit the kill switch and coasted into the garage. I removed the spark plugs to see how they looked...





    I adjusted the idle to 1000 after replacing the plugs....smoooooth!
    After I get the idle/mixture tweaked a bit, I'm sure it will run even better.


    Thanks to everyone for your input. It's great to hear so many varied opinions.
    Looks great to me. I am SURE you will not regret the filters. Too much prevention? NO. Not for a few bucks a year!

  2. #32
    Administrator 20774's Avatar
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    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.
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  3. #33
    Registered User godfather's Avatar
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    Quote Originally Posted by jimmylee View Post
    Looks great to me. I am SURE you will not regret the filters. Too much prevention? NO. Not for a few bucks a year!
    Thanks....and, I am keeping the filters.

    the filters are cheap and make ME look like a genius and I need that.
    Attitude is everything!
    1978 R100/7
    08' V-Strom 650 great light weight tourer

  4. #34
    Registered User godfather's Avatar
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    Quote Originally Posted by 20774 View Post
    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.
    I've only had the bike for 6 weeks...When I ordered the parts, Beemer Boneyard said these are the recommended plug. I will try the 6's next time though. Thanks.
    Attitude is everything!
    1978 R100/7
    08' V-Strom 650 great light weight tourer

  5. #35
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    Quote Originally Posted by 8ninety8 View Post
    I'll bite. Couple years back, float bowls always had rusty stuff in them. bothered me. All screens in place including with Dels third screen at carb fuel inlet. Put on Fram inline filters, next spring float bowls still had red stuff in the bottom, only very fine. So, with tank screens, petcock screens, Frams and Del screens, the bowls still had the red stuff.

    At this point it was getting anal, like "what kind of oil should be used", but kept filters except petcocks, went to ninety degree units, and made an aluminum tank. this fall checked float bowls, finally, nothing. Success, but at a price. Redkote likely would have worked out real nice except that my old tank was coated with some kind of peeling yellowish sealer. FWIW that's the story. Time to order the pizza.
    I also had red stuff and carb floats sticking and leaking. I cleaned out the tank, removed petcocks and screens, thoroughly cleaned, replaced fuel lines, and added two sintered filters. Also cleaned and dressed float needle seat. NO MORE dirt in carbs. No more leaking, and 9,000 miles later. Just checked bowls a few weeks ago when replacing jet needles and needle jets, no residue or dirt whatsoever.

    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"

  6. #36
    Registered User godfather's Avatar
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    Quote Originally Posted by jimmylee View Post

    "an ounce of prevention is worth a pound of cure"

    Bingo!
    Attitude is everything!
    1978 R100/7
    08' V-Strom 650 great light weight tourer

  7. #37
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    Quote Originally Posted by godfather View Post
    Bingo!
    Godfather,

    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.

    JL

  8. #38
    Registered User godfather's Avatar
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    Quote Originally Posted by jimmylee View Post
    Godfather,

    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.

    JL
    There was no visible sign of contaminants in the filters. They were new with less than 100 miles on them so I will assume there must have been water in the gas that caused the paper element filters to plug up. I blew through them comparing airflow to the new(est) ones and the air flow was restricted in the problematic ones.

    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!
    1978 R100/7
    08' V-Strom 650 great light weight tourer

  9. #39
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    Quote Originally Posted by godfather View Post
    There was no visible sign of contaminants in the filters. They were new with less than 100 miles on them so I will assume there must have been water in the gas that caused the paper element filters to plug up. I blew through them comparing airflow to the new(est) ones and the air flow was restricted in the problematic ones.

    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.
    I would suggest that you should use the sintered bronze type next time. Mine came from Max's.

  10. #40
    '92 R100GS '81 R100/t brittrunyon's Avatar
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    Quote Originally Posted by jimmylee View Post
    I would suggest that you should use the sintered bronze type next time.
    What makes them better?

    Just asking..........
    1992 R100 GS, 1981 R100/t, 2007 F 650 GS

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  11. #41
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    Quote Originally Posted by brittrunyon View Post
    What makes them better?

    Just asking..........
    To be honest, I am not sure that they are better! I suspect so, though.

    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.

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