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General Category => Maintenance => Topic started by: a.graham52 on May 08, 2016, 08:50:44 AM

Title: Only idles after repairs
Post by: a.graham52 on May 08, 2016, 08:50:44 AM
I may be jumping the gun here but...

I just adjusted my intake valves on my 87 1200. Also rebuilt a set of carbs (not the originals) with the kits from rpm. I transfered over the floats and the slides from the original carbs to the new carbs. I do not yet have the air box boots installed and figured I try to fire it up. I'm using an auxiliary fuel tank and used some Trufuel premix 2 stroke fuel. It's 92 octane wich is better then the premium I could get at the pump. I used it because it was available and I didn't suspect it would cause a lot of issues for what I was doing.

The bike idles and I was able to sync the carbs buy anything over idle and it will stall out. Almost like the exhaust is plugged. Do you think the fuel is the issue?
Title: Re: Only idles after repairs
Post by: jscgdunn on May 09, 2016, 08:41:38 AM
Put the airbox on for sure;  the bike will not run right without it..  Would recommend straight fuel as well. 
Title: Re: Only idles after repairs
Post by: racerrad8 on May 09, 2016, 03:06:33 PM
If the 2 stroke oil has clogged the pilot jets it will do what you are explaining.

Randy - RPM
Title: Re: Only idles after repairs
Post by: a.graham52 on May 09, 2016, 04:48:45 PM
I guess I wouldn't have thought they wouldnt be THAT sensitive but there's a first time for everything
Title: Re: Only idles after repairs
Post by: racerrad8 on May 09, 2016, 05:17:49 PM
Quote from: a.graham52 on May 09, 2016, 04:48:45 PM
I guess I wouldn't have thought they wouldnt be THAT sensitive but there's a first time for everything

Those holes are microscopic.

When you rebuilt the carbs, did you ultrasonic the carbs?

The pilot circuit is very fussy.

Randy - RPM

Title: Re: Only idles after repairs
Post by: a.graham52 on May 09, 2016, 06:44:04 PM
I ultrasonic ed in strait water then blwe out with carb cleaner and compressed air at 150psi. Not my first mikuni rebuild but there's always something new. I need to get more fuel, I'm thinking it was fuel starvation from the aux tank. But only one way to tell
Title: Re: Only idles after repairs
Post by: a.graham52 on May 09, 2016, 07:32:29 PM
We're all good. I put In almost half a gallon of fuel in my aux and it runs well. Probably didn't have enough fuel weight to push the fuel into the carbs earlier