What other year/model engines fit into a 80SG? I am looking to swap engines because this one died on me and I am not going to spend the money to rebuild it when I can find engines and titleless bikes with less than 10k miles for under $400.
80 SG engine compatibility
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If you don't want to have to move the ignition stuff under the left side cover on the engine, then anything 80 or older will swap in. If your willing to swap in your ignition components, then anything up to an XJ1100 engine will swap in, you just have to put the SG's ignition timing and pickup components and covers on (for the XJ the cover as well, for an 81 engine just the components). I've got an 81 engine in my 80G with my original timing and pickup components and it works just like original.Cy
1980 XS1100G (Brutus) w/81H Engine
Duplicolor Mirage Paint Job (Purple/Green)
Vetter Windjammer IV
Vetter hard bags & Trunk
OEM Luggage Rack
Jardine Spaghetti 4-2 exhaust system
Spade Fuse Box
Turn Signal Auto Cancel Mod
750 FD Mod
TC Spin on Oil Filter Adapter (temp removed)
XJ1100 Front Footpegs
XJ1100 Shocks
I was always taught to respect my elders, but it keeps getting harder to find one. -
If you swap the heads with the engines from a 78, 79, or 80, it will be plug and play. 81's have different black boxes and pick-up coil systems and no ballast resistors.Skids (Sid Hansen)
Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.Comment
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IIRC all the xs11 engines will swap into. (with some ignition mod on the newer ones) Once I get some extra money I to will be getting a new to me engine for my 78. I have to replace the valves on my 80 (Now that I have a title I will be rebuilding it from ground up).Ty
78 XS1100E - Now in Minnesota
80 XS1100LG - The Punisher
82 XJ1100 - Current project - The Twins
82 XJ1100 - Wife's Bike - The Twins
82 XJ1100 - Daughter's Bike
72 Suzuki TS125 - Daughter's Bike
72 Yamaha Mini JT2 - Youngest Daughter's bike (She wants a bigger one now)Comment
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No head swap needed as the heads have nothing to do with it, it's the ignition components under the left cover on the engine. The 80 and 81 have the same heads, just different timing systems and different ignition boxes. Oh, and you can plug 81 coils into an 80 or earlier bike, just bypass the ballast resistor and your good, just like doing an aftermarket there, except you still don't have replaceable wires or higher spark voltage.Cy
1980 XS1100G (Brutus) w/81H Engine
Duplicolor Mirage Paint Job (Purple/Green)
Vetter Windjammer IV
Vetter hard bags & Trunk
OEM Luggage Rack
Jardine Spaghetti 4-2 exhaust system
Spade Fuse Box
Turn Signal Auto Cancel Mod
750 FD Mod
TC Spin on Oil Filter Adapter (temp removed)
XJ1100 Front Footpegs
XJ1100 Shocks
I was always taught to respect my elders, but it keeps getting harder to find one.Comment
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Cy is correct, except on the XJ motors there are a few additional differences that need to be addressed. The big one is the YICS system the XJ used, which complicates carb syncs. Next, the XJ has a different alternator (a bit more output, but harder to find parts for) that uses a different regulator. Last, the XJ uses a low oil sensor, not pressure. You can swap the earlier parts for all of this except the YICS; well, you can swap for this too, but you need to change the barrels/head, so it's easier to just block it off. A member here sells the fix for this...Fast, Cheap, Reliable... Pick any two
'78E original owner - resto project
'78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
'82 XJ rebuild project
'80SG restified, red SOLD
'79F parts...
'81H more parts...
Other current bikes:
'93 XL1200 Anniversary Sportster 85RWHP
'86 XL883/1200 Chopper
'82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
Cage: '13 Mustang GT/CS with a few 'custom' touches
Yep, can't leave nuthin' alone...Comment
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engine
Hey Bottle:
Where are you in the badger?
I've got a great running 79 sf engine 70,000 mi, plus a low (16000) mi 80g
engine that doesn't run. you can have them both for $100.00
I'm at the border just South of Broadhead Wi
PM if interestedTom Clisham
Age is relative YOU WON"T GET OLD TIL YOU SELL THE BIKE
_____________________________________________
'78xs1100E ,all stock & original GONE TO WISCONSIN
'80 SG Vetter fairing,hard bags,trunk,fork brace,
stock headers with fishtail mufflers,black & beautiful GONE TO ARIZONA
79SF lowered,jardine 4/2 exhaust,pod filters,drilled rotors,fork brace, bar hopper
79SF 1 owner,8000 miles, restoring to completely original ( I hope) GONE TO FRANCEComment
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Skids (Sid Hansen)
Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.Comment
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Steve has a good point. Any of the XS motors will swap with nothing more than making sure you keep the same ignition timing gear that your engine had, the XJ engine can also be swapped in, but there are additional issues. My understanding though is taht while the charging system is different, the reg/rect is the same, but the connectors are different, so it's just changing of connectors to make it work.Cy
1980 XS1100G (Brutus) w/81H Engine
Duplicolor Mirage Paint Job (Purple/Green)
Vetter Windjammer IV
Vetter hard bags & Trunk
OEM Luggage Rack
Jardine Spaghetti 4-2 exhaust system
Spade Fuse Box
Turn Signal Auto Cancel Mod
750 FD Mod
TC Spin on Oil Filter Adapter (temp removed)
XJ1100 Front Footpegs
XJ1100 Shocks
I was always taught to respect my elders, but it keeps getting harder to find one.Comment
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That's what I thought too, but the parts fiche shows a different part number; seems odd that they'd change the connectors only...Fast, Cheap, Reliable... Pick any two
'78E original owner - resto project
'78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
'82 XJ rebuild project
'80SG restified, red SOLD
'79F parts...
'81H more parts...
Other current bikes:
'93 XL1200 Anniversary Sportster 85RWHP
'86 XL883/1200 Chopper
'82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
Cage: '13 Mustang GT/CS with a few 'custom' touches
Yep, can't leave nuthin' alone...Comment
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Think about it, since it comes with the connectors on it, it would be a different part number. If it was different, they wouldn't be able to use a geezer regulator by just changing the connectors on it. Any time a part/assy includes the connectors as part of it, that would change the part number.Cy
1980 XS1100G (Brutus) w/81H Engine
Duplicolor Mirage Paint Job (Purple/Green)
Vetter Windjammer IV
Vetter hard bags & Trunk
OEM Luggage Rack
Jardine Spaghetti 4-2 exhaust system
Spade Fuse Box
Turn Signal Auto Cancel Mod
750 FD Mod
TC Spin on Oil Filter Adapter (temp removed)
XJ1100 Front Footpegs
XJ1100 Shocks
I was always taught to respect my elders, but it keeps getting harder to find one.Comment
Comment