Built2Last wrote on 09/10/11 at 01:16:58:

Are you talking about the one almost everyone agrees never needs replaced ?

I gots lots of people telling me about their problems,

I gots lots of problems "done gone away" once Raptorized.

Verslagen is aware

You are aware

Ain't no mystery to it any more.

And yes, take a stock air filter (new clean one preferably) and try to suck some air through it with your lips -- there is some resistance you can feel even when brand new and clean.    Some taste, too -- yuck

When you go to a low resistance air filter, you decrease the intake tract suction level accordingly.

Fuel amount when you become a real engine modding wicker can change from high 50's mph to high 30's for mpg, which is a significant enough change but can be explained logically as "the extra power had to come from somewhere, so you had to burn more gas to make that extra power".

Plus, high HP engines aren't always noted for highly gas efficient usage.  

Jetting alone isn't the entire story to high performance -- for example I still use the stock jets in my carburetor but I just use a lot more RPMs to make a lot more HP since I have a cam that allows that to happen now.

Routy, you putt putt around on a stock bike (that's fine, BTW).

Verslagen has a carefully custom modded vac petcock on a high performance engine (that's fine too).

Verslagen is likely gonna bite the bullet again before you do (again, that is -- he has already done bit the bullet and done rebuilds, etc already)

Now, could all of these fine normal bike engine people who have Raptorized have FIXED their vac petcocks?   Yup, Verslagen can even teach you how to fix it to flow enough gas even after you run a cone air filter and you lower your intake suction levels.  He knows how to do it.

But why would you bother to do all that and still have to watch it all the time for signs of impending screw up?

A Raptorization is a bit like having your tonsils or your appendix or your wisdom teeth removed.  

You CAN wait until you have acute appendicitis and you are in the hospital knocking on death's door before you do anything.

Or you can get it removed at the first tell tale signs of trouble ....





Vac sucker is the same thing, once it starts to show itself -- pluck it out.

I'll change the o ring when i change the oil but thanks for the reminder.