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possible jetting issue??

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    #1

    possible jetting issue??

    Hi all,

    I tried to do a search but couldn't find anything to help me. I recently sync'd the carbs on my 81 GS850G. I did this according to the Clymer manual. My problem is this, I am still getting a slight raspy exhaust note on the upper rpm range for each gear. It sounds like it's running out of gas. It also stumbles and pops during warm up. Again, I set carbs 1 & 4 slightly higher than 2 & 3. The bike has a 4 into 1 exhaust with the stock air filter. What should I do to smooth things out? It does pull a lot smoother and stronger than before.

    Thanks,

    Scott
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    #2
    Did the bike get jetted for the 4-1 exhaust? What type of 4-1 is it. Some companies have jetting reccomendations listed on their websites.
    1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
    1985 GS1150ES stock with 85 Red E bodywork.

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      #3
      Originally posted by chef1366 View Post
      Did the bike get jetted for the 4-1 exhaust? What type of 4-1 is it. Some companies have jetting reccomendations listed on their websites.
      I'm not sure if it was jetted or not.

      Comment

        #4
        What Chef says. Check the carbs for more than stock jetting. Some 4 into 1's don't need jet changes (not many) but I'd check for sure. Motorcycles are very tempramental when it comes to carbs. Go to this site it may help. http://www.factorypro.com/tech_tunin...m_engines.html

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