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DirtyMike · June 3rd, 2018, 07:09 PM

Hello Everyone,

I recently picked a 1987 ninja 250. I cleaned the carbs and put in new seals, injectors, and synced them. I also replaced the petcock as it was leaking on the side. I also think the petcock was clogging since bike would run for 5-10 minutes then shut off and not start again. After sitting for 20 minutes the bike would run again.
I replaced the spark plugs (Put in CR7HSA, not CR8HSA). I tightened the throttle and choke cables.

Now, I am trying to get the bike to idle but it is being stubborn. It will idle at around 3000 but will not stay. By that I mean it idles for 20-30 seconds then sputters down to 0. If I try to set it any lower than 3000 it will not idle at all. I messed with the air mixture screw in both directions but did not get any results. Any suggestions?

June 3rd, 2018, 07:09 PM	#1
DirtyMike ninjette.org newbie Name: Kelly Location: Boulder Join Date: Jun 2018 Motorcycle(s): 1987 Ninja 250 Posts: 5	[1987] Need help fixing Idle Hello Everyone, I recently picked a 1987 ninja 250. I cleaned the carbs and put in new seals, injectors, and synced them. I also replaced the petcock as it was leaking on the side. I also think the petcock was clogging since bike would run for 5-10 minutes then shut off and not start again. After sitting for 20 minutes the bike would run again. I replaced the spark plugs (Put in CR7HSA, not CR8HSA). I tightened the throttle and choke cables. Now, I am trying to get the bike to idle but it is being stubborn. It will idle at around 3000 but will not stay. By that I mean it idles for 20-30 seconds then sputters down to 0. If I try to set it any lower than 3000 it will not idle at all. I messed with the air mixture screw in both directions but did not get any results. Any suggestions?