Building a motor. 4 mil stock cylinder or cub?

[joey83]

I was just about to contact Fast or Passion and send my cylinders off for porting and starting thinking about some cub cylinders... The price of stock cylinders is about $200. Port job plus shipping $425 ish. I'm going to have at least $600 in stock cylinders. I've been looking around at 68mm 421cc cubs but I don't know much about building them. What other costs would I see when building a cub compared to stock cylinder bike?

 

So far for my build I have

Complete bottom end with 4mil Hotrods stroker crank

cylinder spacer plate (but didn't want to use it)

Stock bore clean virgin cylinders

Cool head with 20cc domes

34mm mikuni carbs (want to ditch these for some PWK?)

 

I need

Port my cylinders or get cubs

ditch my carbs for some PWK's

Pistons rings and gasket and seal kit

 

 

What other costs are involved with a cub build? And I want some custom domes to eliminate the spacer. What carbs should I get? Just wanting to get some ideas before I start throwing money out for parts. Any ideas or suggestions? Thanks

 

These are the original cylinders for this motor next to a set of virgin cylinders. The originals were pretty heavily ported but need resleeved.

[SuperMex]

I was just about to contact Fast or Passion and send my cylinders off for porting and starting thinking about some cub cylinders... The price of stock cylinders is about $200. Port job plus shipping $425 ish. I'm going to have at least $600 in stock cylinders. I've been looking around at 68mm 421cc cubs but I don't know much about building them. What other costs would I see when building a cub compared to stock cylinder bike?

 

So far for my build I have

Complete bottom end with 4mil Hotrods stroker crank

cylinder spacer plate (but didn't want to use it)

Stock bore clean virgin cylinders

Cool head with 20cc domes

34mm mikuni carbs (want to ditch these for some PWK?)

 

I need

Port my cylinders or get cubs

ditch my carbs for some PWK's

Pistons rings and gasket and seal kit

 

 

What other costs are involved with a cub build? And I want some custom domes to eliminate the spacer. What carbs should I get? Just wanting to get some ideas before I start throwing money out for parts. Any ideas or suggestions? Thanks

 

These are the original cylinders for this motor next to a set of virgin cylinders. The originals were pretty heavily ported but need resleeved.

Buy these for a good all around motor. http://bansheehq.com/forums/index.php?showtopic=159372

[joey83]

Maybe a serval would be a better fit. I ride the trails quite a bit.. So now my comparison would be stock cylinder vs serval top end. Those ported cylinders are trashed. They were on the bike when the rod let go too.

[rjdgriff]

Serval all the way

[joey83]

The bike has a set of cpi in frame super clean pipes already on it. I know theyre a top end pipe but how much will the affect my bottom end? I really want to have it together before the BHQ ride at Little Sahara but my wife would get all kinds of crazy if I spent $2000 in like 2 days. So it looks like I will be rolling pretty stock at the ride. I just melted my other banshee last week so the plan is to put cylinders pistons and rings in that motor then just putting it this bike for the ride. Wheres the best place to get a serval top end? FAST? Passion is 1 hr from me too. What about a clutch set up for trails mx and dunes? How about side cut gears too? Thanks for all the info!!!!

[joey83]

What pistons in serval with my 4 mil hot rods crank?

[BigRed350x]

Give Kevin @ HJR a call! He can answer all of your questions for you and get you the engine you really want AND get it to you faster than the other builders you mentioned! Don't waste your time sitting around waiting! You said you want to be ready for the HQ ride...

 

-Jared