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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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  #1  
Old 20th December 2004
chieftd's Avatar
chieftd chieftd is offline
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Join Date: Nov 2004
Location: Kapolei Hawaii
Posts: 135
Sportster/Buell Model: XLH Sportster 883/1200
Sportster/Buell Year: 1989
Reputation: 88
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Default Have a 1200 conversion now, is a 1250 or 1340 conversion worth the trouble and $$$?

Hey folks, just wondering from those in the know if this is a worthwhile endeavor? Here's my set up so far:

Thunderstorm Heads
Buell Pistons
SE bolt in cams
SE performance ignition
SE performance coil
SE air breather kit
Dynajet kit for the carb, new jets
V&H 2-1 Pro pipe

putting out 82 hp and 72 ft lbs as set up.

I got some cash burning a hole in my pocket and was contemplating MORE HP!

If I went with either upgrade could I leave everything else the same and still be compatible?

Are the bolt on kits the way to go?

Would the HP gain be worth the $$$ spent?

Which would you recommend to do or should I just leave it alone and buy some shiny shit for the bike?

Many thanks in advance. regards, chieftd
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  #2  
Old 20th December 2004
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gwcrim gwcrim is offline
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Join Date: Nov 2004
Location: Steubenville, Ohio
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Sportster/Buell Model: 1200 Sport
Sportster/Buell Year: 1999
Sportster/Buell Model #2: Cafe el Roadkill
Sportster/Buell Year #2: 199?
Other Motorcycle Model: KX520
Other Motorcycle Year: 1989
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More cubic inches is always a good modification. But going to 1250 now is a waste of money. But anything larger requires splitting the cases and boring the spigots to accept BIG jugs. If you're going that route, you'll want to go with an 88" kit.
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  #3  
Old 20th December 2004
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dmraco dmraco is offline
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NOS or supercharger. a 6 speed would be cool to
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  #4  
Old 21st December 2004
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heads flowed and a nitrous kit will make your bike 110 hp and 100 lbs...whats your compression? My 80/80 engine hits 113hp/108 tq on juice.
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  #5  
Old 21st December 2004
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chieftd chieftd is offline
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Sportster/Buell Model: XLH Sportster 883/1200
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Default Narley, I don't know the compression numbers

unfortunately, I'm not mechanically inclined at all. I had a friend of a friend do the work and he didn't tell me much about it in terms of compression. I bought TS heads and Buell pistons and then had the jugs bored. It runs fine but I don't know the specifics. I know....I'm a dumbass, but thats me!

I still have my heart set on doing a street tracker conversion so I guess the curent power output is sufficient. I just got in touch with a guy today that said he would do the work so I plan on talking to him this week to get some ideas and prices.

Thanks for your inputs, hell I might find a way to rig a nitrous bottle on it but I'm a bit leary of them things simply because I have never used it and don't want to blow the motor up or hurt myself!

We'll see how it goes. Later, chieftd
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  #6  
Old 21st December 2004
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Got money burning a hole in your pocket?

NALLIN RACING

NEW! 1430cc BIG BORE KITS FOR THE 2004 & UP SPORTSTER

http://www.nallinracing.com/index.shtml

From $1195

Turn your new XL into the absolute nastiest hot-rod around! Just introduced, these kits take your Sporty out to the maximum bore size you can get in your stock cases. Of course, this engine kit comes with the finest quality components money can buy: all-aluminum nik-a-sil plated cylinders from Axtell, matching forged Hurricane pistons with tool steel wrist pins, Total Seal rings, and Cometic EST gaskets!

Note: case boring is required for installation. $275

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  #7  
Old 21st December 2004
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Holy S#$T a 87 cubic inch sporty. That sure would be fun and just think of it those BT wouldn't have jack on you with that power to weight ratio.
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  #8  
Old 22nd December 2004
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Sportster/Buell Model: XL883 w/NRHS Stage 3 1250
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Sportster/Buell Model #2: XB9SX CityX
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WTF? I am sorry, but I sufficiently scare myself every day with 76ci.

--Sean
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  #9  
Old 22nd December 2004
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Sportster/Buell Model: 883C/1250
Sportster/Buell Year: 2003
Sportster/Buell Model #2: 1200C/1450
Sportster/Buell Year #2: 2004
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I think I'm just an adrenline junky, cuz I want one. Sure I scare the piss out of myself on a regular basis, but I could still use an extra 11 cubic inches . You just cant have a bike with too many Cubes
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