50 replies to this topic

[Spark]

Alrighty my Gas Gas Racing model arrived last week with the PWK 28 carb. The bike runs amazing with this carb on! The bike runs so crisp, not a hint of richness. I cannot feel a loss in bottom end, and the bike picks up revs much quicker with more power as well. The odd pinging I used to get with the Dellorto is not there and I am getting better economy as well.To say I'm pleased would be an understatement.

[Neo]

copemech, on 14 February 2011 - 06:35 AM, said:

Dum de dum de dum!!!!!!!!!!!

Try solder and a drill!

Sorry Cope the penny didn't drop on this one

What drill sizes correlate to what jet sizes?

Best of balance.
Neo

[Neo]

Hey Cope ... any update on this?

Best of balance.
Neo

[copemech]

Neo, on 29 April 2011 - 06:21 AM, said:

Hey Cope ... any update on this?

Best of balance.
Neo

Seems they are metric standard, so a 50 would be 0.5mm as I get it.
I did a bit of sweep on this today and does seem impossible at the pilot sizes.

I have small drills down to .5mm, and plan to take my choke jet out to .70 by this method of drilling, yet a look at the scales suggest at even #80 on the smallest standard drills would be at near a 40 pilot. And not in a good work range for experimentation.

Seems to me on the carbs, one needs to go about 5 points in either direction to get the screw in range, then go half that to fine tune and let the screw do the rest. A point here or there makes little difference.

Edited by copemech, 30 April 2011 - 03:58 AM.

[copemech]

Spark, on 26 April 2011 - 07:50 AM, said:

Alrighty my Gas Gas Racing model arrived last week with the PWK 28 carb. The bike runs amazing with this carb on! The bike runs so crisp, not a hint of richness. I cannot feel a loss in bottom end, and the bike picks up revs much quicker with more power as well. The odd pinging I used to get with the Dellorto is not there and I am getting better economy as well.To say I'm pleased would be an understatement.

The PWK is a good carb,and appropriate to the bike. They got some stick for thos that want it! Yet smooth within the range.

Last I heard, Caby has gone back to it on the Sherco. ? As well as others. Not sure here,, but ?

Wait and see what shows at SSDT!

[Neo]

copemech, on 30 April 2011 - 03:54 AM, said:

Seems they are metric standard, so a 50 would be 0.5mm as I get it.
I did a bit of sweep on this today and does seem impossible at the pilot sizes.

I have small drills down to .5mm, and plan to take my choke jet out to .70 by this method of drilling, yet a look at the scales suggest at even #80 on the smallest standard drills would be at near a 40 pilot. And not in a good work range for experimentation.

Seems to me on the carbs, one needs to go about 5 points in either direction to get the screw in range, then go half that to fine tune and let the screw do the rest. A point here or there makes little difference.

Hmmm ... lots of confusing information on this on the web so I have just ordered a set of bits (0.3 to 1mm) and will try the good old fashion "trial and error" method ... got nothing to loose really

Best of balance.
Neo