39mm PWK's too big?

[Building my First]

I got a good deal on some PWK's, they were suposed to be 35's. Just got them in the mail and they are 39mm! I know how to measure, they are 39mm inside bore on the engine side.

 

I am putting me engine together soon:

-.060 over Wiseco Pro-Lites

-The cylinders were already ported, had to get them cleaned up. They are aggresive trail/ dune port.

-Cool Head w/ 19 or 20 cc domes, I don't know yet.

-V Force II Reeds, I might try some Carbon Tech Reeds, hear they are good

-Pro Circuit Platinum Pipes, although I hear CPI is the way to go.

-I have an adjustable timing plate, not sure if I should mess with that.

 

Do you guy think I could run the 39's? I do have a Vito's +4 crank that needs to be rebuilt, but I am not a big fan of Vito's so I will probably use the new oem crank I have. I need some help with a few decisions.

[fasstbanshee]

I got a good deal on some PWK's, they were suposed to be 35's. Just got them in the mail and they are 39mm! I know how to measure, they are 39mm inside bore on the engine side.

 

I am putting me engine together soon:

-.060 over Wiseco Pro-Lites

-The cylinders were already ported, had to get them cleaned up. They are aggresive trail/ dune port.

-Cool Head w/ 19 or 20 cc domes, I don't know yet.

-V Force II Reeds, I might try some Carbon Tech Reeds, hear they are good

-Pro Circuit Platinum Pipes, although I hear CPI is the way to go.

-I have an adjustable timing plate, not sure if I should mess with that.

 

Do you guy think I could run the 39's? I do have a Vito's +4 crank that needs to be rebuilt, but I am not a big fan of Vito's so I will probably use the new oem crank I have. I need some help with a few decisions.

 

you'd want 35mm but maybe 39mm will work if you are primarily drag racing.....see what other people s opinions are too

Edited February 14, 2009 by fasstbanshee

[rubberneck]

With a trail/dune port and procircuits, i am thinking you are going to want 33s. My guess is it would be a kick ass motor with 28s. I think 39s are too much for you. I run 39s on my cub and am not sure if I would be better off with 35's

[88bansheebitch]

39s are way big for them mods

[Tedder]

Maybe we should talk about a trade. I've got a real nice pair of gas 35 PWK Air Strikers with billet bowls and intakes.

We ran them on our asphalt bike until switching to alcohol.

PM me if interested.

[05.Banshee.SE]

Set your timing to +4 when you get that head and domes on, that's the most common "best running setting."

[locogato11283]

i would trade them off for some 33's or 35's.

[Building my First]

Hopefully Tedder will get back to me so we can work something out. I didn't realize how Scottish ( me Engine ) sounds!

[Snopczynski]

35mm-39mm is too big for the pro circuits. The pipes wont pull a high enough rpm to benefit from a carb that big.