G oog le BadWeB | Login/out | Topics | Search | Custodians | Register | Edit Profile


Buell Forum » XBoard » Buell XBoard Archives » Archive through November 12, 2009 » XB9 pistons in XB12 daily drivable? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

The4ork
Posted on Wednesday, November 11, 2009 - 02:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

just looking at the option as i have sourced a set of 9 pistons for dirt cheap, and im getting ready to do a tear down of the motor anyways.

i drive around daily usually with about 1/4 tank of 100 octane low-lead and the rest 91. mine is on an older S1 motor, but i figure you guys prably do this mod often, just looking for some insight.

of course i cant do computer tuning so im a little bit limited, but i can keep the mixture fat and back the timing off a few degrees if i need to
Top of pagePrevious messageNext messageBottom of page Link to this message

Nillaice
Posted on Wednesday, November 11, 2009 - 04:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

i thought the pistons were the same.

since 9's crank is a shorter stroke, they have longer connecting rods
Top of pagePrevious messageNext messageBottom of page Link to this message

Puddlepirate
Posted on Wednesday, November 11, 2009 - 06:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Pistons aren't the same. The 9 pistons are domed while the 12 pistons are nearly flat.
Top of pagePrevious messageNext messageBottom of page Link to this message

Glitch
Posted on Wednesday, November 11, 2009 - 06:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

i thought the pistons were the same.

since 9's crank is a shorter stroke, they have longer connecting rods


Nope, and Nope...

The pistons are different.
9 pistons in a 12 will raise compression.
The con rods are the same size, it's the crank that is different.

XB9 pistons in XB12 daily drivable?
As far as I've read, yes.
Top of pagePrevious messageNext messageBottom of page Link to this message

Hogs
Posted on Wednesday, November 11, 2009 - 07:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Yes, I believe many have done this and drive them daily, with no worries,I think some have just adjusted their timing abit , but not sure on that, all else being stock like... except the basic mods everyone does...
Top of pagePrevious messageNext messageBottom of page Link to this message

Bads1
Posted on Wednesday, November 11, 2009 - 07:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

No unless your running race gas.
Top of pagePrevious messageNext messageBottom of page Link to this message

Fast1075
Posted on Wednesday, November 11, 2009 - 08:18 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Will XB pistons work with S1 heads??? Aren't S1 heads open chamber....and XB heads bathtub chambers?...

(Message edited by fast1075 on November 11, 2009)
Top of pagePrevious messageNext messageBottom of page Link to this message

Vagelis46
Posted on Wednesday, November 11, 2009 - 09:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I use XB9 pistons in my XB12.

Firstly I thought it was great with 98-100 octane gas, more power no "pinging". Then one pretty hot day about 25-28Celsius I pushed the bike hard and there was some serious "pinging".

After that happened, each time I go for a "fast" ride or to the track I use octane boosters and I am very happy. The bike is flying and no "pinging"...
Top of pagePrevious messageNext messageBottom of page Link to this message

Barker
Posted on Wednesday, November 11, 2009 - 11:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Fuell becomes an issue at 14:1 ish compression ratio.
Top of pagePrevious messageNext messageBottom of page Link to this message

Rocketsprink
Posted on Wednesday, November 11, 2009 - 02:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Paul James ran his 12 race bike with 9 pistons on pump gas. However, the ecm was reprogrammed which I'm sure stop the "pinging"

(Message edited by rocketsprink on November 11, 2009)
Top of pagePrevious messageNext messageBottom of page Link to this message

Fast1075
Posted on Wednesday, November 11, 2009 - 04:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If I were you, I would call Cycle Rama and ask them if XB pistons will work in an S1 engine....the heads ARE NOT the same on an S1 and XB...For what little I know, the pistons have to match the heads.
Top of pagePrevious messageNext messageBottom of page Link to this message

The4ork
Posted on Wednesday, November 11, 2009 - 09:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

sorry i should have specified... i have nrhs stg3 XB heads and xb12 cylinders
Top of pagePrevious messageNext messageBottom of page Link to this message

Hogs
Posted on Wednesday, November 11, 2009 - 09:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The4ork,
Sorry they won`t Work..But I know someone that will take em off your hands... j/k
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a private posting area. Only registered users and custodians may post messages here.
Password:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration