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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.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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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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