Hello, I have A 1981 GS550T 9.000miles, StageIII.K&Ncones.carbs rebuilt&cleaned. I started having a problem above 5grand, acts like i hit rev limiter .resynched carbs no better then i did coil relay mod. new wires&boots.needle 4th from top.155mains middle 2 . 150m outer 2 cyl. plugs look slight lean. wires and boots improved throttle. as did relay mod. but still breaks up any gear. W-O-T pulls untill exactly 5grand. Did relay mod , had 9.8v both coils. runs great other wise. bowls are full fuel. new petcock. this did not do it last year when i did dynojet/pods. or didit happen when i first took out, this spring. I AM NUTS,tank like new inside,plenty of power to batt,.also 4in 1 MAC pipe steel baffle. put onlast year also. thanks for your time. any ideas welcome! SAN
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Sounds like an Igniter problem. -
5.ooorpm break up
HI thats the only thing i can think of.since i did coil mod today. now to find one to try it. before buy it. Thanks SANComment
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I had same thing on my 801000G. That's prob the reference Chef is making as he rode it & did some diagnosis on it too.....
I switched out the ignitor for a Dyna S. I also had a coil going bad. I tested the ignitor using the manual tests & it failed.....
Dyna S is $120 from Z1. You have the mechanical advance like me I believe so it's pretty much a doddle to fit.
Dan
1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/Comment
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Great looking T.
Dyna S for ND ignition is the one to get.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-ResurrectionComment
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5.000rpm breaking up
Well it seems minds of the wise are in agreement. how do you test the igniter. Thank you for the info guys, Enjoy the ride.SANComment
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Involved putting a 1.5V battery across a couple of the contacts from memory.... Should be in the Clymer manual, that's where I got it from.1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/Comment
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5.000rpm breaks up
Well the one good thing is the coil mod has made a big inprovement, to the overall running of bike(exept my up rpm prob) never started better idles smoooth. Also looking at my igniter its not ND. Kokusan denki BB1204 12V, i now 2 types were used Nippon&Koku . Is one better than other, not that it really matters now.Thanks for your help. SANComment
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