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

Buell Forum » Old School Buell » Xb motor in an S1 frame? « Previous Next »

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

Doz
Posted on Wednesday, December 06, 2017 - 10:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I may have the chance to score a nice S1 and I happen to have a fairly fresh xb9 motor. Anyone ever attempt this?
Top of pagePrevious messageNext messageBottom of page Link to this message

Red93stang
Posted on Wednesday, December 06, 2017 - 11:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes itís been done.
Top of pagePrevious messageNext messageBottom of page Link to this message

S1owner
Posted on Thursday, December 07, 2017 - 03:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes been done
This guy is in the Neatherlands and has done it several times







Top of pagePrevious messageNext messageBottom of page Link to this message

Upthemaiden
Posted on Thursday, December 07, 2017 - 07:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just one thing to note, that bike in the picture appears to be an M2 frame, and the exhaust header is able to squeak under the right side of the frame. Your S1 would have a lower frame and you might not be able to fit the XB header on the bike. I'm not sure if the S1 header would fit onto the XB engine, but even if it does you'd be looking at a custom arrangement for an exhaust, or you could use the XB exhaust and may have to get your headers rewelded to fit.
Top of pagePrevious messageNext messageBottom of page Link to this message

Doz
Posted on Thursday, December 07, 2017 - 09:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for the input. I've yet to purchase the bike but was just wondering about the combination since I've already got the xb motor and the s1 motor needs a total rebuild. Don't know if there is any real benefit. The header issue is a cakewalk, other than mounting points I'm thinking the fuel delivery system would be the biggest difference between the two.
Top of pagePrevious messageNext messageBottom of page Link to this message

Upthemaiden
Posted on Thursday, December 07, 2017 - 09:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

As far as benefits, like you said you'd be switching from the carb to FI, which would be a plus if you prefer FI. I think even though you're switching from a 1203cc motor to a 984cc motor, with the better heads on the XB I think you still end up with pretty much the same HP. I used to have an XB9 and I don't know that I really remember the engines feeling THAT different.

Other than that, I'm sure there are a few other upgrades inside the XB motor just based on it being a slightly newer design.

Downsides, are that you're ending up with a more complicated bike, and engine that doesn't share as many parts with a sportster, so eventually little pieces will be harder to track down.

Also keep in mind you'll need to track down some extra parts to make it all come together like the XB swingarm, oil lines, weld a mount on the frame for the rear shock, front engine mount for the XB motor to tube frame, XB rear wheel.... and are you really gonna do all of that without swapping to an XB front end while you're at it??

In the end the only parts you're gonna be left with off of the S1 are the frame, tank, tail, seat, and footpegs. If you're in it just for the project, then absolutely go for it. If you were debating it because you assumed sliding that XB motor into the S1 frame would be a practical alternative to rebuilding the S1 motor, I think you'd probably be better rebuilding the S1 motor and saving the XB motor for someday when someone sells an xb with a blown motor for $1000. I feel like personally if I had the money to spend, I'd just spend the money and time rebuilding the S1 motor with a 1450 kit and a bunch of top end work. Just my opinion, I'd be very interested in following along with your project regardless of which way you go with it.
Top of pagePrevious messageNext messageBottom of page Link to this message

Phelan
Posted on Thursday, December 07, 2017 - 10:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What are you talking about? Over 75% of an XB motor is shared with the same year XL1200 Sportster. Gaskets, cylinders, heads (machining is slightly different between the two but only an hour or so work to make either work on the other), pushrods (but not the covers), rockerboxes (except rocker covers), oil pump (03-07, fittings are different but swappable, pump itself is the same), entire transmission, primary drive is the same except the clutch basket.

That said, putting an XB motor in a tuber is a shit ton of fabrication. Much cheaper to build an XB so everything bolts together. I love fabrication and do a lot of it, but there's a reason I never did a project like this. Cheaper and more fun to rebuild or just buy an S1 and an XB than to make a hybrid of the 2, and not rake/trail figures to keep an eye on to keep it safe.

(Message edited by phelan on December 07, 2017)
Top of pagePrevious messageNext messageBottom of page Link to this message

S1owner
Posted on Friday, December 08, 2017 - 04:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I will say this
I put an XB swingarm and fronyvend on.
It was literally 10 times more work then I was prepared for.
If will not do another large mod again!!!!!
Top of pagePrevious messageNext messageBottom of page Link to this message

Doz
Posted on Friday, December 08, 2017 - 07:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ok, ok. I got it. Maybe a cool idea but not worth the trouble...or the time. But I may use xb wheels or a laced set. Or just focus on doing a chrome frame and blacked out engine. Lots to consider during the winter months
Top of pagePrevious messageNext messageBottom of page Link to this message

Upthemaiden
Posted on Friday, December 08, 2017 - 08:06 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"What are you talking about? Over 75% of an XB motor is shared with the same year XL1200 Sportster."

I said they don't share AS many parts, I didn't say they don't share any. As far as I had always heard, tuber engines were sportster engines with different top ends, but by the time the XBs came around they started making some of their own parts for the bottom end too.
Top of pagePrevious messageNext messageBottom of page Link to this message

Kc_zombie
Posted on Friday, December 08, 2017 - 11:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you are planning to use a complete example of an S1 for you're chop, er, mod job, then please reconsider. A rebuild would be a better choice. IMHO

I have a nice S1 frame with title I'll sell ya...
Top of pagePrevious messageNext messageBottom of page Link to this message

Phelan
Posted on Friday, December 08, 2017 - 12:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sorry, I read that wrong. 96-up Tubers also got different cams and lightened cranks, except M2 didn't get cams and S2 didn't get anything (bone stock Sportster motor).
Top of pagePrevious messageNext messageBottom of page Link to this message

Doz
Posted on Friday, December 08, 2017 - 02:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks Kc, but the bike is fairly complete. I'm not a fan of chopping- especially a buell. Currently I'm leaning toward a restore. Just keep tripping over this spare xb motor.
Top of pagePrevious messageNext messageBottom of page Link to this message

S1owner
Posted on Friday, December 08, 2017 - 03:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Laced wheels would be cool!
Top of pagePrevious messageNext messageBottom of page Link to this message

Ratbuell
Posted on Friday, December 08, 2017 - 03:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The other thing you give up on an XB motor is the trap door transmission. Blow a gear in an XB? Time to split the cases...
Top of pagePrevious messageNext messageBottom of page Link to this message

Brother_in_buells
Posted on Friday, December 08, 2017 - 04:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It is doable to put a xb engine in a tuber frame without cutting and welding on the frame.
You could even keep with the under slung suspension ,but especially for a S1 you better stay with a tuber/sportster engine.

I know what you mean with tripping over the xb engine ,keep that or sell it to put that money in the S1 restore!
Or find a known good tuber engine from someone on here.
Top of pagePrevious messageNext messageBottom of page Link to this message

S1owner
Posted on Friday, December 08, 2017 - 04:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Buy a cheap old xs650 or something and cram that xb power plant in it



Top of pagePrevious messageNext messageBottom of page Link to this message

Oopezoo
Posted on Friday, December 08, 2017 - 05:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

hell yeah......wow, that looks sweet

If the S1 is even close to being a usable bike, I would sell that XB9 motor and sink the cash into the S1. It won't take long to spend it......trust me. Mechanically, my S1 ran pretty well when I traded for it, but it had been through years of neglect. I stopped keeping track of receipts, but I think I have spent more on repairs and updates on it than I originally acquired it for. Looking back, I could have bought a pristine X1 or a really nicely sorted S1 for what I have wrapped up in mine, but its been a fun adventure and I don't regret it.
« 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