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Shudder on accel or steady speed

  • rockyrob
    rockyrob
    15 years ago

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    Not sure if its map related or not but reflashed a new map after installing  2-1 V & H and heavy breather. Bike seems to stutter when taking off and shudder while going up thru the gears. At around 70 klm  it shudders (almost as if it has a wheel out of balanceor like a four cyclinder running on three, sorry bit hard to explain) mild but annoying.  I have an old Norton which used to have the same  feeling and it turned out it was running rich so i wondered Is it possible it is something to do with the map.or am i maybe just feeling the resonating of the two in ones  Bike seems to pull hard and starts great idels  fine etc. Some decal popping more so when it gets hot. I am in the process of smart tuning with the SEST to see if it suggests any changes.Can some one tell me if i can save a half dozen data rides and then smarttune in one go or do i need to do it one run at a time?   Can anyone see anything obvious that may be wrong with the current config? Sorry it doesnt have the headings in the columns and rows but i assume if you can comment on it  you would know what they are  :) I also saw Scott,ys general AFR figures for road use and wondered about trying some of those figures.

    Great forum and advice i learn more everyday Cheers Rob

     

     

  • nimo07sporty
    nimo07sporty
    15 years ago
    hi there jsut wondering ive been searching for some info on similar problem bike idles fine accelerates great but makes more of a not so much shudder feeling but more like a car that has water in fuel and im trying to work out what may be causeing this? i did have some water in a bad batch of fuel and ive had the tank off twice and cleaned all filters etc im trying to eliminate possible problems. maybe my fuel map is dodgy, or o2 sensors are buggered or running too lean, im not sure about this but bike is very jerky sometimes when im just cruising at like 50 and trying to just cruize but its fine at 100 and at 60 so any help or comments would be much appreciated. my bike is a 07 1200 custom sporty with s&s slip ons
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