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Is it worth the time and money to go the bigbore kit on the xs1100 79 special? seen seller on flea bay selling pistons rings wrist pins n head gasket for $150 plus s+h??
Till then
Mr.Bill
Till then
Mr.Bill
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79 XS1100 SPECIAL (2) 1100 wings- 82 HONDA CX 500 TURBO (2)77 GOLDWING 86 HONDA NIGHT HAWK 84 HONDA 700 83 nighthawk 650 SC-INTERCEPTOR 2 1975 RUPP CENTAURS VW TRIKE (2) 77 YAMAHA 750 TRIPLE 84 YAMAHA 600 83 GS 750 SUZUKI 70? CB350 Honda scrambler- THATS ALL THIS WEEK MR.BILL -
Based-on discussion here, not unless you have a reason to.1979 XS1100F
2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights. -
You don't really gain any power from it. So unless you need to bore the cylinders for some reason, it is not really worth it.Nathan
KD9ARL
μολὼν λαβέ
1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters
Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner
In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.
Theodore RooseveltComment
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No reason except I want it to be faster I'm old but not dead..Originally posted by IanDMacDonald View Post
usually more cc creates more HP and torque.
Till then Thanks Mr.Bill
79 XS1100 SPECIAL (2) 1100 wings- 82 HONDA CX 500 TURBO (2)77 GOLDWING 86 HONDA NIGHT HAWK 84 HONDA 700 83 nighthawk 650 SC-INTERCEPTOR 2 1975 RUPP CENTAURS VW TRIKE (2) 77 YAMAHA 750 TRIPLE 84 YAMAHA 600 83 GS 750 SUZUKI 70? CB350 Honda scrambler- THATS ALL THIS WEEK MR.BILLComment
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And changing to a K&N filter adds 10 hp......Originally posted by mrbsyammy View PostNo reason except I want it to be faster I'm old but not dead..
usually more cc creates more HP and torque.
Till then Thanks Mr.BillNathan
KD9ARL
μολὼν λαβέ
1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters
Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner
In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.
Theodore RooseveltComment
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My $.02
You are gaining decent displacement, but doing nothing to the intake or exhaust to make it breathe/flow better, raise compression or headwork. You are not gonna get more in or out of the cylinders than stock unless you increase flow in from the carbs or out through the exhaust. Larger displacement in the case of the XS is not gonna do much, if anything.
I would suspect any gains are from the fact it is a fresh engine build and feels new under the butt dyno.
Example: And Yes, I love the ZRX....My ZRX 1200 has a totally stock internal engine. Stock pistons, stock cams, stock compression. By upping the ability to breathe with a jet kit, header system and exhaust slip-on, I have raised power from stock 110hp/79 ft/lbs to a current 125hp/83 ft/lbs. These numbers are even better now (but not dyno'd yet) with adaptation of larger carbs from the ZZR1200. It's not so much the overall numbers but the fact the power is from way down low all the way to the top. This engine carries 70ft/lbs from 3k rpm up to 9500 rpm with a peak of 83 ft/lbs. 66ft/lbs at 2500 rpm... As much as the XS1100 is rated at the crankshaft by the factory on its best day... All because of making it breathe better.Howard
ZRX1200
BTW, ZRX carbs have the same spacing as the XS11... http://www.xs11.com/forum/showthread.php?t=35462Comment
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The smart money says enjoy the XS11 for what it is. If you wanna go faster, buy something else.
Last edited by jetmechmarty; 09-03-2014, 08:08 AM.Marty (in Mississippi)
XS1100SG
XS650SK
XS650SH
XS650G
XS6502F
XS650EComment
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already did that soon as I bought it but thanksOriginally posted by natemoen View Post79 XS1100 SPECIAL (2) 1100 wings- 82 HONDA CX 500 TURBO (2)77 GOLDWING 86 HONDA NIGHT HAWK 84 HONDA 700 83 nighthawk 650 SC-INTERCEPTOR 2 1975 RUPP CENTAURS VW TRIKE (2) 77 YAMAHA 750 TRIPLE 84 YAMAHA 600 83 GS 750 SUZUKI 70? CB350 Honda scrambler- THATS ALL THIS WEEK MR.BILLComment
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Nice bikes. Well the only way I would get a another bike is if someone bought it being disabled and getting $800 per month does not allow for new toys.Originally posted by jetmechmarty View PostThe smart money says enjoy the XS11 for what it is. If you wanna go faster, buy something else.
79 XS1100 SPECIAL (2) 1100 wings- 82 HONDA CX 500 TURBO (2)77 GOLDWING 86 HONDA NIGHT HAWK 84 HONDA 700 83 nighthawk 650 SC-INTERCEPTOR 2 1975 RUPP CENTAURS VW TRIKE (2) 77 YAMAHA 750 TRIPLE 84 YAMAHA 600 83 GS 750 SUZUKI 70? CB350 Honda scrambler- THATS ALL THIS WEEK MR.BILLComment
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I was told that the xj has bigger valves and just a better top end is this true and would this be the way to go keep in mind I am on a limited income being disabled and getting $800 per month. I do have an extra 1100 xs engine so I would do whatever mods to it since I want to be able to go back to original if I ever decide to sell it.Originally posted by Bonz View Post
Till then thanks Mr.Bill
79 XS1100 SPECIAL (2) 1100 wings- 82 HONDA CX 500 TURBO (2)77 GOLDWING 86 HONDA NIGHT HAWK 84 HONDA 700 83 nighthawk 650 SC-INTERCEPTOR 2 1975 RUPP CENTAURS VW TRIKE (2) 77 YAMAHA 750 TRIPLE 84 YAMAHA 600 83 GS 750 SUZUKI 70? CB350 Honda scrambler- THATS ALL THIS WEEK MR.BILLComment
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Are you doing all of the work yourself? Otherwise, your mechanic bill for doing any engine work will eat a big chunk of that fixed income. My bike is faster than many, and I love it! However, the work did not come cheap.1979 XS1100F
2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.Comment
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Is that Pee Wee's bike?Originally posted by mrbsyammy View PostNice bikes. Well the only way I would get a another bike is if someone bought it being disabled and getting $800 per month does not allow for new toys.1979 XS1100F
2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.Comment
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Yamaha detuned the XS/XJ motor over the course of production, with 'improvements' being attempts to regain power lost due to emission factors. As designed, Yamaha didn't really leave anything on the table.
The XJ head does have larger valves, but also has a larger combustion chamber, so the loss of compression is only partially offset by the larger valves. The XJ also has milder cams (another reason for the larger valves) that helps with the midrange but hurts top-end power.
So as a power-adder, a big-bore really won't add much power (a few HP) unless you also improve the breathing, and things like a professional ported head and aftermarket cams are definitely not lo-buck. Very careful tuning is the best path to power on a budget, with particular attention paid to ignition timing, both initial timing and the timing curve.
Search for posts by Dan Hodges for more info.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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Burnt orange and white gave me a HP boost!
No seriously - the '81 Navy bike has a big bore kit and has a noticeable increase in seat of the pants power over stock - that being said - my 78 was very close.
JohnJohn is in an anonymous city with an Alamo (N29.519227,W-98.678980)
Go ahead, click on the bikes - you know you want to...the electrons are ready.
'81 XS1100H - "Enterprise"
Bob Jones Custom Navy bike: Tkat brace, EBC floating rotors & SS lines, ROX pivot risers, Geezer rectifier, new 3H3 engine
"Not all treasure is silver and gold"Comment
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The 78 and 79 engines are quicker than the 80 - 83 and they have smaller valves.Originally posted by mrbsyammy View PostI was told that the xj has bigger valves and just a better top end is this true and would this be the way to go keep in mind I am on a limited income being disabled and getting $800 per month. I do have an extra 1100 xs engine so I would do whatever mods to it since I want to be able to go back to original if I ever decide to sell it.
Till then thanks Mr.Bill
That engine doesn't run any better than the stock 79 engine in my bike. I rode with Russ a lot when he was on that bike. 97cc doesn't make much difference in the grand scheme. The Navy Bike has also been converted to the 2H7 TCI and has a centrifugal advance. It would run a lot better with a good exhaust on it I thinkOriginally posted by jwhughes3 View PostGreg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.
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