Bare will tell you PWK are easy and very forgiving to jet, i have them i went with the advice on here and when muts dyno’d it he only changed a pilot one size pwk has a spigot you can use for the oil pipe
I believe its more to do with the experience you have with jetting the carbs. A standard carb for our bikes has more bits you can alter or adjust compared to a PWK. I would go with the carb you feel more at home with, unless you want a specific trait which one carb displays more than others you can choose from.
Got my Pwk 28's from Mutts, who drilled and fitted the oil line spigots for me and also sorted a base line jetting to start off with - may need tweaking for the 400 engine, but no 2 bikes are the same anyway. He said the Pwk's are good for mid 70's bhp. Go too big and you could have driveability issues. Billet intakes may mean lining carbs up with the airbox could be difficult. Whenever I've used billet intakes, I've used pod filters, by choice rather than necessity, but they do seem to sit the carbs at a different angle to stock. My intakes were also drilled and spigots fitted - I've blanked off the carbs and the oil pipes run to the intakes so you wont need to upset them if the carbs come off for jetting changes. I had to trim the outer cable cover to allow the inner cables on the throttle to work properly with the Pwk's - simple enough to do
If i can remember correctly Yazza had big problems trying to jet his TMX carbs together with Mutts. They then made a quick swap over to the PWK's and they found it much easier to jet and gave more constant results.
Last Edit: Apr 11, 2021 12:56:57 GMT 1 by Tobyjugs
Post by tony2stroke on Apr 11, 2021 12:57:19 GMT 1
I have put some knock off 30mm PWK powerjet carbs on my standard porting 250LC with RAMAIR filters, initial results are good, starts and runs nice up down back lane, ticks over great too, early days to say for sure yet, most likely need to re-visit the jetting, I have heard of a few people now using them, just with the knock off you need to do your own quality control, also put gen Keihin jets in.
Had to cut down the angled cable guide and tap the end to screw in to carb top, but no problem really.
Wales where the men are men and the sheep are beautiful
Or remove the metal angled bits entirely ? As I found My cables (albeit Bespoke DIY ones from good grade Bicycle bits) Did the bend into the carb top, far more smoothly / less friction than the metal bits allowed.