Intermittent power loss past 85mph
Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the CBRXX.com.

Register ButtonIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Page 1 of 2 12 LastLast
Results 1 to 15 of 18
Like Tree1Likes

Thread: Intermittent power loss past 85mph

  1. #1

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times

    Intermittent power loss past 85mph

    Here is a pic under my tank
    Attached Images Attached Images

  2. # ADS
    Sponsor
    Join Date
    Always
    Posts
    Many

    CBRXX.com is the original Honda CBR1100XX Super Blackbird community! Registered Users do not see these ads. Please Register - It's Free!


  3. #2

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    It looks to me like I'm missing the tank vent hose intirely. Can I get new hose from AutoZone and could this be my problem

  4. #3

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    7,101
    Liked
    1837 times

    Re: Intermittent power loss past 85mph

    Yes you can. Could be. I'd blow back through that line with the gas cap open and see if you hear airflow.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  5. Remove Advertisements
    CBRXX.com
    Advertisements
     

  6. #4

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    Once I replace the hose to the tank, where do I attach the other end? Also how long should the hose be?

  7. #5

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    Do I connect the hose directly under the tank or under the petcock?

  8. #6

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    7,101
    Liked
    1837 times

    Re: Intermittent power loss past 85mph

    It should run down and hang between the swing arm and rear tire
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  9. #7

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    I replaced the vent hose and was able to blow air through it fairly easy. I ran the bike and can see fumes exiting the hose. I will test it tomorrow on the highway.

  10. #8

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    I tested the bike today and no progress. Any other suggestions before I put her in the shop?8

  11. #9

    Member #
    17374
    Bike(s)
    '97 Red-and-Black-bird.
    Join Date
    Dec 11 2013
    Location
    Melbourne, Australia
    Posts
    1,123
    Liked
    462 times

    Re: Intermittent power loss past 85mph

    Did you confirm the air defectors are in place?
    adeyren likes this.
    No good deed goes unpunished!

  12. #10

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    7,101
    Liked
    1837 times

    Re: Intermittent power loss past 85mph

    Depends on your mechanical abilities. The next step for me would be to pull the carbs and do a thorough cleaning.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  13. #11

    Member #
    1586
    Bike(s)
    1997 blackbird
    Join Date
    May 16 2007
    Location
    leominster, ma
    Posts
    62
    Liked
    0 times

    Re: Intermittent power loss past 85mph

    I had to replace the fuel petcock diaphragm when I had it shutting off on the highway like that.

    Sent from my E6810 using Tapatalk
    full Yoshi exhaust, jetted, k&n air filter, smoked front signals, powerbronze undertail, smoked led integrator, black PAZZO levers

  14. #12

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    Yes, the air deflectors are in place. My mechanical abilities are mediocre at best. I could probably do it but it would take me too long. Thank you all for advice and input. I am going to put her in the shop. I will post again when I have some answers. Maybe it can help someone in the future so they don't have to spend the $ I'm about to.

  15. #13

    Member #
    36455
    Join Date
    Sep 01 2018
    Posts
    89
    Liked
    13 times
    Can someone explain how in 6th gear she cuts out past 85-90mph however, in 5th gear she will get to 135mph before acting like running out of gas?

  16. #14

    Member #
    2343
    Bike(s)
    2K Titanium, 85 V65 Sabre (Totalled but saved me)
    Join Date
    Sep 24 2007
    Location
    Arizona
    Posts
    7,101
    Liked
    1837 times

    Re: Intermittent power loss past 85mph

    Only thing that I can think of that would explain it would be power to load ratio. 5th you have more gearing to be able to push the weight so the bike technically doesn't have to strain as much to move it. But you will have more rpm so it should want more fuel. So your issue may not be a fueling one but an ignition issue. Pulling the bike up in a higher gear will put more load on the systems (spark and fuel). I know you split the thread from your earlier post. But have you changed the plugs since your high speed pass. You might have cooked them. The other possibility that comes to mind is the coils or the system is pulling timing out. Coils can be checked by changing. Timing is another matter there's no way to easily see what the bike is doing on the road. You'd have to hook it up to a dyno and then find a way to monitor the spark curve. the first and easiest although it could get messy is pull the inspection cover on the right side of the bike and then hook up a timing light to number one plug. Shoot the timing marks with the light as you make a pull and see what happens to the indication. It should advance as the rpm climbs. If it drops back and the bike stumbles then it could be sensing pre-ignition ping and be pulling out timing.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  17. #15

    Member #
    21813
    Bike(s)
    2000 XX & '06 Stratoliner
    Join Date
    Jul 05 2016
    Location
    Reston, VA
    Posts
    20
    Liked
    9 times

    Re: Intermittent power loss past 85mph

    Petescbrxx, I think you’ve answered your own question in saying “she will get to 135mph before acting like running out of gas”. She’s not acting, she is running out of gas. This is not good for the bike because you’re running the motor out very lean, which is not a good thing to do.


    Sayoda recommends a good thing to check >> the fuel petcock diaphragm. Start the bike let it warm up for 1-2 min. Warm but not hot. Turn the idle up a bit to a high idle (1500) While high idling turn the petcock valve off, quickly unhook the fuel line, then turn the petcock valve full “on” for a few secs while the bike is still idling. Might want a cup to catch the fuel. Watch to see if there is a solid stream of fuel coming out of the petcock fuel line fitting, or a somewhat restricted stream. If it's not a solid easy flowing stream the fuel petcock diaphragm probably needs to be replaced. That paper thin rubber diaphragm is 20+ year old now so it wouldn't be surprising if the ethanol has taken its toll....


 
Page 1 of 2 12 LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •