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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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View Poll Results: Have you converted your 883 to a 1200?
883/1200 conversion is done 536 38.07%
I haven't done the conversion, but plan on it 531 37.71%
I plan on leaving my 883 as it is 150 10.65%
I am still undecided 191 13.57%
Voters: 1408. You may not vote on this poll

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  #391  
Old 3rd December 2019
npaisnel npaisnel is offline
Chief Master Mechanic
 
Join Date: Apr 2016
Location: Jersey, Channel Islands, UK
Posts: 495
Sportster/Buell Model: XL883 now 1200
Sportster/Buell Year: 2004
Sportster/Buell Model #2: XLH883
Sportster/Buell Year #2: 1993
Reputation: 241044
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Default

Yes,
first I did with a V-Twin manufacturing kit.

Avoid that shit like the plague.

The oil return from the head rocker box down the barrel through an internal bore leaked oil. yes the outer casing was ..I don't know..cracked/split..what ever..it let oil out 2 fins down form the head, rear pot, back LHS,

It was a brand new kit I had, all boxed up ..but i was not original purchaser..so they washed their hands of any involvement..even though it was a manufacturing fault. It leaked from the first day.

I at first assumed I had mucked up and ballsed up the head gasket or O ring. so i stripped and rebuilt he rear cylinder.only to find it was still leaking. Only then did I notice the oil was coming from a fin or two below the head..and it was then i spotted the crack ...

Ignore that V-Twin Manufacturing shit at all cost.


All ripped off now and a Hammer 1275 kit on there now instead
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  #392  
Old 26th January 2020
Nibelungen's Avatar
Nibelungen Nibelungen is offline
Custom Bike Builder
 
Join Date: Aug 2016
Location: Emilia, Italy
Posts: 2,393
Sportster/Buell Model: xl883n Iron (2019 engine)
Sportster/Buell Year: 2017
Sportster/Buell Model #2: xl Hugger (sold)
Sportster/Buell Year #2: 2001
Reputation: 8591471
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i could have her rebuilt as a 1200 after the engine was totalled this late spring
i choose instead to have her back like a stock 883...
overhere authorithies and insurance companies have not a light hand about converted bike...

also in this way she keeps her value better overtime... like my previous ride did...

besides
it's not for power i bought a Sporty

this summer crossed my mind to buy again a Superbike
rode also for some time one (Kawa z900)

then now... i have my bike back and i'm quite satisfied with the way she deliver the power
i think now to keep her and change rather my car with a more powerful one
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Last edited by Nibelungen; 26th January 2020 at 21:28..
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  #393  
Old 23rd February 2020
fafcpa fafcpa is online now
XL FORUM TEAM MEMBER
 
Join Date: Sep 2005
Location: Connecticut
Posts: 935
Sportster/Buell Model: 883 XLH
Sportster/Buell Year: 2003
Other Motorcycle Model: Dyna Street Bob
Other Motorcycle Year: 2008
Reputation: 447056
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No need to do it, enjoy the bike the way it is.
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  #394  
Old 23rd February 2020
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Folkie Folkie is offline
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Location: Western Weald
Posts: 46,415
Sportster/Buell Model: XL1200CB
Sportster/Buell Year: 2015
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There's a lot to be said for that.
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  #395  
Old 23rd February 2020
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Highly-Dangerous Highly-Dangerous is offline
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Join Date: Apr 2019
Location: 17130 Spain
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Sportster/Buell Model: XL 883 ₪ 1275
Sportster/Buell Year: 2006
Other Motorcycle Model: Big Dog K9
Other Motorcycle Year: 2006
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1275

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  #396  
Old 23rd February 2020
npaisnel npaisnel is offline
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Join Date: Apr 2016
Location: Jersey, Channel Islands, UK
Posts: 495
Sportster/Buell Model: XL883 now 1200
Sportster/Buell Year: 2004
Sportster/Buell Model #2: XLH883
Sportster/Buell Year #2: 1993
Reputation: 241044
npaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant futurenpaisnel has a brilliant future
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Quote:
Originally Posted by fafcpa View Post
No need to do it, enjoy the bike the way it is.
I fully understand that
Just picked up a 1993 XL883
Only 2504 miles.
Bit rusty in places, but other than that it is perfect.

Yes, my 04 1275 XL that sticks out near on 90HP and 97 ftlbs torque is fun, but really too loud, and for blipping around the lanes here in Jersey with 40 Max MPH, and 20 & 30 around a lot of town, the 883 with standard pipes is just perfect

I’ll not be changing it either. Most I’ll do is relocate the rear indicators and fit some Ghost Brackets for panniers
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  #397  
Old 1 Day Ago
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FiftySixer FiftySixer is offline
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Default Poor Man Conversion I Hope

Greetings Fellow Forum Member

Well it looks like I'll be picking up my (new to me) 1999 883 Sportster Custom tomorrow.

I'm pretty excited and looking forward to going through the conversion process again. My last bike took me quite a bit of time to get all the parts collected but it really came out right.

I bought used 05XB12 heads had them refurbished and used 05 883 cylinders bored to stock 1203cc. Then added stock Buell XB pistons. I already had an amazing 2 into 1 on the bike. I wish I could find that pipe again...Added an N4 cam and a Mikuni 42 with a NRHS Hurricane AC using a 3" K&N filter. Then added a DynaTech 2000 programmable nose cone ignition. I had the add a Pingle drag race petcock because the bike was starved with the stock petcock.

That bike ripped. Last dyno on that bike that I remember was about 78hp at the wheel, and (i laugh now) but I was disappointed that was all it had back then. But seat of the pants feel was exhilarating and it pulled like a locomotive.

I put in a picture of it incase someone recognizes the header pipe. Best looking one I've ever seen too.

I am poor as a roach and this time around it may be way more spartan than the one before and probably a lot slower.

I'll be doing cosmetics first since they are cheap. I know a real crackerjack painter and I'll be bringing him the tank and fender within a few weeks of getting it home.

I posted some old pics hoping someone will recognize the header pipe.

My Old Bike from 2014



Closeup of header

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  #398  
Old 1 Day Ago
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rokytnji rokytnji is offline
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Looks good. Bet the springer got comments.
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  #399  
Old 1 Day Ago
Hellbent_4 Hellbent_4 is online now
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Sportster/Buell Model: XLH883 Hugger
Sportster/Buell Year: 2002
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Just installed my Hammer kit and have 174 miles on break-in so far.
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