cubby port timing numbers

[burleybanshee]

I am thinking about going to 421 cubby. I know i need to upgrade the clutch and pipes to fit the new power.

 

Question is, what is the stock out of box exhaust numbers on a cub. Trying to compare with what my stockers have. I know they are a drag port and make a lot more power, no comparision. Just want to know blow down and exhaust numbers on stock none touched 4mil cub cylinder.

[No Limit Powersports]

68x58 comes around 197* ex 130* tf they also have 3 transfers per side and triple exhaust ports

[dajogejr]

Clutch, pipes, intakes and carbs...to be honest.

 

And it is my advice if you plan on shifting it....get a dunable override as well.

 

Then you just have to worry about a longer swingarm, longer chain, better tires and more gear..