Carb Tuning lessons learned.

[Crazcnuk]

Another mod I've seen mentioned is drilling out the air hole in the slide?

The DynaJet kits come with a drill bit for this purpose.

Anyone tried that mod, or know what it is supposed to do?

I assume it's to make the slides more responsive.

[Ivan]

I have seen this too. On a Harley site none the less. I dont remember what size the drill is on the Dynojet kit. For some reason #63 sticks in my head.

Only thing I can figure is that it would lift the needle sooner, I dont know for sure though.

[Crazcnuk]

That is what I am thinking it does. With a larger 'excape' hole, vacuum should be able to lift the skides quicker, maybe adding throttle response.

Now, on smaller bikes this may be good, on ours, maybe not so good!

[Ivan]

I rode home from work with the #41 size hole in the pilot air jet. Much better. I think this dog finally found the scent.

More to come...

[petejw]

Ive got the DJ kits fitted to my bike,
the drill bit used to enlarge the slide hole is listed as DD#39.
measured with vernier callipers the bit is 2.50mm.

What difference did it make, cant really say, i never tried the kit without
drilling the slide, i figure by enlarging the hole it would slow down the rate of lift.

[oseaghdha]

We Need

I think we need a carbs only section to catch all this stuff.