Question about engine size.

[FIDOSOL]

I imagine so, all this depends on my wife learning to ride, I've mandated that she learn to ride if for no other reason than I think she needs to know how, hell everyone NEEDS TO KNOW HOW TO RIDE A MOTORCYCLE! That aside, if she enjoys riding she can have my bike, and I'm getting a new one. If she doesn't like riding, then I just have an excuse to have two bikes because she already said I could get a new one. [smirk]

 

[bad juju]

my old buell instructer said you can put xb 9 pistons in the xb 12 motor higher compression!never seen it done.but i suppose the theory is sound!

 

[RHYNOXB9R]

Hey FIDO,check out www.halspa.com they race the xb and have rippen big bore kits for them as well.

 

[FIDOSOL]

Good link man. That is probably the best I can get without spending more than I have any right to.

 

[dave_xb12r]

So Fido, what happened to buying a 12? Are you just gonna make your SX a 12 instead? I think you should get the CR. Has anyone on here bought a CR yet? You could be the first!! Hurry and buy it now!!

 

[FIDOSOL]

LoL, I will have to wait on a new bike until I get to germany, now the issue I have is that I can ship my motorcycle with my household goods, but, it adds to my overall weight, and there is a limit to how much weight the gov't will ship for free, I'm not sure if I would be able to ship around 850lbs worth of motorcycles (and motorcycle gear) and all my other stuff without going over, still would have to be cheaper than shipping it seperate. Just another battle to win against the wife... I will have to ride the CR first and the 1125R and the Benelli 1130 Cafe Racer...

Someone on one of the posts said I shouldn't get two of the same bike, and my question is this...why not? If you have 1 dollar and you see another dollar, you want it right?

 

[dave_xb12r]

That Benelli is pretty cool, but I think service and parts are going to be hard to come across. Stick with the buells! Why dont you try to restore a REAL cafe racer while you are over there? Something like a BSA or a Norton. Is the wife going with you to germany?

 

[FIDOSOL]

Yes she is, I already hae a restoration project. 78' Chevy Cheyenne 4X4..

 

[LeFox]

my old buell instructer said you can put xb 9 pistons in the xb 12 motor higher compression!never seen it done.but i suppose the theory is sound!

yea, that works, but the engine can't handle the compression without further mods...atleast not for too long.

 

[FIDOSOL]

What other mods would it need?

 

[LeFox]

other valves, springs, crank, ecm tuning, etc...

 

[TMC]

He won't need a crank. unless he want's to lighten it or put some carillo rods on it. but yes you will have to put it on dyno and have it tuned or you'll burn it up in a flash

 

[LeFox]

the original cranck will go crooked with that type of compression.

 

[TMC]

nah not at 10:5:1 I've built a many of 88" motors with stock cranks. He should have any probs what so ever

 

[LeFox]

ahm...you'll get about 12:1 when placing XB9 pistons in a XB12

 

[dave_xb12r]

wow.... thats crazy compression!

 

[sinpieces]

I know a company who made a bigbore. They found crooked cranks in a 07 model which had been running all original and low miles. Lousy!
So, for bigbore you probably need fatter and/ or hardened cranks. Bigbore would be cool. Just wish i could afford ported heads, new cams and a remapp. That is the smarter move for longivity of engine.

 

[Bill2]

A simple way to answer is a xb9 and xb12 both have 3&1/2 dia. pistons, the xb12 gets its larger displacement from longer rods. You could say its a factory stroker.

 

[big b]

Rod length will not change displacement. Just bore and stroke.

 

[Bill2]

Does'nt longer rods give you a longer stroke?