Hi lads, I've just pulled my bug out of the shed again after about 5 years of neglect

Went and did a quick tune on the carbs ( twin 40IDF) and just cannot get the thing to run nicely, 1600dp btw. It's running 50 idles, so jetting is not an issue.

I did notice a dribble from the accel pump jet? The little grey one that pokes out the side of the barrel. It's the one that squirts when you pump throttle, just not sure what the 'jet' is called..

Is this a problem seen much before? What needs fixing?

This thing uses a ridiculous amount if fuel too.

Cheers
Luke

Probably gunk caught under the needle and seat

Is it easy to get in there and clean it out?

youtube is your friend
.
http://www.youtube.com/watch?v=rl1Nkuk99Pc 

Hi mate, I believe I sold you these carbs years ago... My name on here at the time would have been bajamick or 1916baja... I did tell you they needed an air leak fixed on the butterfly shafts. If you have not had this fixed they won't run properly. Then they'll need to be jetted to suit your motor. They were jetted to suit my 1916cc.

Hope this helps.
Mick.

Quote:

Originally posted by baja burley Hi lads, I've just pulled my bug out of the shed again after about 5 years of neglect Went and did a quick tune on the carbs ( twin 40IDF) and just cannot get the thing to run nicely, 1600dp btw. It's running 50 idles, so jetting is not an issue. I did notice a dribble from the accel pump jet? The little grey one that pokes out the side of the barrel. It's the one that squirts when you pump throttle, just not sure what the 'jet' is called.. Is this a problem seen much before? What needs fixing? This thing uses a ridiculous amount if fuel too. Cheers Luke

If they have been sitting for 5 years then you really should pull them down for a freshen up. Old fuel can leave a varnish like residue in carbs that can easily block passages and cause you grief.

Oxidisation of the housings etc can also cause problems with blockages, and O rings will deteriorate.

Its worth taking the hour or so to do a pull down and clean

Really Mick? I vaguely remember the 1916 chat! Far out that was a long time ago. It seems I should pull them down and rebuild anyway. I cant remember any chat about air leaks, was too long ago. When you say it was in the shaft, do you remember if it was a damaged butterfly or something else?

I did check the idle jets - 50 jets. Surely the others can wait until its idling and running sweet to be swapped and dialed in yeah?

Fuel pressure is whatever is coming from the factory pump

The air leak was behind the linkage on the left hand carbie I believe... Between the carb body and the butterfly shaft. ( the shaft the butterflies are bolted to) I did explain this, that's why they were so cheap! It's why I could never get them to run right .. Always had an erratic idle. I went to kadrons and sold the whole kit with linkage and manifolds for like $200... Spray some wd40 or something like that on the 2 throttle linkages when it's running like crap and watch the revs change. They need rebuilding including that seal.