Only idles after repairs

[a.graham52]

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?

[jscgdunn]

Put the airbox on for sure;  the bike will not run right without it..  Would recommend straight fuel as well. 

[racerrad8]

If the 2 stroke oil has clogged the pilot jets it will do what you are explaining.

Randy - RPM

[a.graham52]

I guess I wouldn't have thought they wouldnt be THAT sensitive but there's a first time for everything

[racerrad8]

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

[a.graham52]

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

[a.graham52]

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