by Warkton Tornado No.1 » Wed Apr 17, 2019 10:17 pm
Despite the current trend to fit ever smaller carburettors, a mate ordered a 32 mm PWK but got a 34 mm supplied. It was about a tenner or so, brand new & was checked out but required no blue-printing to match the OKO's etc. This has been fitted to his new build running a standardish 200 engine with a Scoot RS expansion chamber. Fitted with an ample sized elbow & foam filter, it has been a delight to set up, now that the power-jet is blanked off (for now…) & a 32 pilot fitted, it has not flooded @ all.
That is almost certainly because the float chamber incorporates an overflow, unlike the “PHBH much better carb” which has no such thing. In fact, the design is superior & why some European motorcycle manufacturers fit them as standard. Any good two stroke tuning book will explain why the guillotine slide is better than the four-stroke derived round slide as Amal’s & PH range Dell’Orto’s have.
Jets (such as Stage6) are available in sets of ten or so @ a fraction of the cost required to achieve a similar range with the Dell‘Orto.
The only downside to the PWK’s that I can think of (apart from the PWK spawning so many poor copies) is the lack of a built-in fuel filter. However, that has yet to be an issue….