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Everyone,
1980 GS850L that I bought last spring and wouldn't run without choke on and didn't idle very well either. After much trouble last year getting the carbs apart and other misc. issues I have made some real progress this spring. I'll try to give as much detail as I can. I hoping to get this bike fixed to actually take a ride but at a loss again. Thanks in advance for any suggestions!
The issue right now is that it starts and idles great! After 45-60 seconds I can idle with no choke. After it warms up it will rev up to 4000 rpm but then die out like it's not getting gas. I can at the first time crack the throttle (multiple times) and hit 6000 with ease. After that though I can only get 4000 and if I try to stay on the throttle at a constent it will only reach 2500-3000. With the choke pulled at this point it will race right back up to 5000-6000 with backfiring out of the mufflers.
-new intake boots/clamps
-new intake o-rings
-new airbox boots/clamps
-coils test good
-valves verified (changed 3 shims)
-new spark plug caps (NGK) since the old ones had no resistance
-carbs have been cleaned 3-4 times (dipped each time) and the last time each sat in for 24 hrs. All jets also cleaned.
-new o-rings throughout the carbs
-airbox is sealed
-K&N air filter in stock box which was recharged but I ended up cleaning it again with concerns there might be to much oil on it.
-Bench synced and Morgan tuned
-All electrical connections cleaned
-R/R replaced from Duaneage (old one was shot)
-Stator tested marginal at 60-65 however I couldn't rev up to 4000 or keep it there for good readings
-New battery
-Fuse box cleaned
-Air screws are at 2.5 out from lightly seated
-Testing using a satellite tank with clear gas line (to eliminate petcock which is new as of last year anyway), vacuum line has been plugged
-Gas is easily getting into the carbs with no leaks anywhere
-Floats are adjusted to spec and needle moves freely to allow or stop gas
-When I posted my last video of the carb slides everyone said that they looked fine in operation.
The only thing I can think of is that there may not be enough of a vacuum in the system to raise the diaphram/slide/needle. This is the part of the throttle response where there is an issue. I can not find any air leaks or any signs of a leak in the system though. I can verify that the passage of air for the main jet is clear but as far as I remember it was fine when I checked them over after cleaning.
HELP PLEASE!!!!!
1980 GS850L that I bought last spring and wouldn't run without choke on and didn't idle very well either. After much trouble last year getting the carbs apart and other misc. issues I have made some real progress this spring. I'll try to give as much detail as I can. I hoping to get this bike fixed to actually take a ride but at a loss again. Thanks in advance for any suggestions!
The issue right now is that it starts and idles great! After 45-60 seconds I can idle with no choke. After it warms up it will rev up to 4000 rpm but then die out like it's not getting gas. I can at the first time crack the throttle (multiple times) and hit 6000 with ease. After that though I can only get 4000 and if I try to stay on the throttle at a constent it will only reach 2500-3000. With the choke pulled at this point it will race right back up to 5000-6000 with backfiring out of the mufflers.
-new intake boots/clamps
-new intake o-rings
-new airbox boots/clamps
-coils test good
-valves verified (changed 3 shims)
-new spark plug caps (NGK) since the old ones had no resistance
-carbs have been cleaned 3-4 times (dipped each time) and the last time each sat in for 24 hrs. All jets also cleaned.
-new o-rings throughout the carbs
-airbox is sealed
-K&N air filter in stock box which was recharged but I ended up cleaning it again with concerns there might be to much oil on it.
-Bench synced and Morgan tuned
-All electrical connections cleaned
-R/R replaced from Duaneage (old one was shot)
-Stator tested marginal at 60-65 however I couldn't rev up to 4000 or keep it there for good readings
-New battery
-Fuse box cleaned
-Air screws are at 2.5 out from lightly seated
-Testing using a satellite tank with clear gas line (to eliminate petcock which is new as of last year anyway), vacuum line has been plugged
-Gas is easily getting into the carbs with no leaks anywhere
-Floats are adjusted to spec and needle moves freely to allow or stop gas
-When I posted my last video of the carb slides everyone said that they looked fine in operation.
The only thing I can think of is that there may not be enough of a vacuum in the system to raise the diaphram/slide/needle. This is the part of the throttle response where there is an issue. I can not find any air leaks or any signs of a leak in the system though. I can verify that the passage of air for the main jet is clear but as far as I remember it was fine when I checked them over after cleaning.
HELP PLEASE!!!!!
. I can get readings tomorrow evening. Thanks
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