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anyone out there have oversized pistons for sale i need to bore and cant find pistons less than 500.00 i could care less if they are used...but in good shape
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windjammer gump
bikes now own
1981xs1100sh special
1971 cb 350
mini chopper project
bikes use to own
1978 750/four..
1983kz1100 ltd -
They are SUPER RARE. You would be better off getting a used engine if the cylinders.fees are that bad. Have you pulled the head to actually see what the cylinders look like?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 Roosevelt -
How big ya want to go? I have a set I picked up from Crazcnuk that look huge with domes on em. Would have to measure them to see what size they are.2-79 XS1100 SF
2-78 XS1100 E Best bike Ever
80 XS 1100 SG Big bore kit but not fully running yet.
Couple of more parts bikes of which 2 more will live!Comment
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wasn't he the one that had the 80mm pistons?Originally posted by Rasputin View PostNathan
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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Do you NEED to bore or just WANT to bore?
If your cylinders look like they can be honed to a nice cross hatch and you are still within tolerance, say around 2.815" +/- measured in several places in the cylinder after you hone and your pistons measure around 2.813" +/- just above the skirt then you can still get a piston/cylinder wall clearance of .002" +/-. That is on the edge of the tolerance but there is probably no need to re-bore.
Believe me, its worth checking all this our first as replacement or after market stuff for this motor is rare and quite expensive.Mike Giroir
79 XS-1100 Special
Once you un-can a can of worms, the only way to re-can them is with a bigger can.Comment
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I can measure them and take some pics sometime today. I seem to remember the number 74mm, but will have to check.2-79 XS1100 SF
2-78 XS1100 E Best bike Ever
80 XS 1100 SG Big bore kit but not fully running yet.
Couple of more parts bikes of which 2 more will live!Comment
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Soooo while were on this subject. How often are people buy pistons for there bikes? I have been thinking about making a new set for my bike. Making them from 7075 and then having them cryo treated and then ceramic coated. We use to do that back in my race days with VW and porsches 10+ years ago.
I was planning on making 74mm pistons and boring out my motor but im doing research right now on if a 1978 block has enough meat to do it. I hear rumor that the 1980 had more meat than the 78
anyway thought i would throw that out there.1978 E XS1100 purchased for =$600.00
crap load of time spent modifying it = Priceless
My bike has the XS motor but can't really call it XS11
(or at least it still looks like the XS motor)
it has about 50% of the frame left from the XS bikeComment
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1 top ring is missing in this set. I have no idea if they can be found. Some kind of fancy wrist pins that have buttons and floating pins. RCE 75mm cast inside. The jugs are not useable, but man are they hogged out compared to the stock one.
2-79 XS1100 SF
2-78 XS1100 E Best bike Ever
80 XS 1100 SG Big bore kit but not fully running yet.
Couple of more parts bikes of which 2 more will live!Comment
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wiseco kit being installed
went ahead an found a 1179 kit and just bought new stuff ....pistons are rare so if anyone has any they better hold on to themwindjammer gump
bikes now own
1981xs1100sh special
1971 cb 350
mini chopper project
bikes use to own
1978 750/four..
1983kz1100 ltdComment
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I have the 80mm pistons...no rings or wrist pins. Brand new. Racing pistons, forged Alcoa aluminum. 11:1 compression ratio. Venolia brand, they are still in business. $50.00 + shipping if you are interested.
Stock bore for an XJ is 71.5mm (stroke is 68mm) These forged pistons are 79.325 mm by means of a friend's dial caliper, meaning they would - probably - fit an 80mm bore. Would make the XS engine out to be about 1232CCs.Jerry Fields
'82 XJ 'Sojourn'
'06 Concours
My Galleries Page.
My Blog Page.
"... life is just a honky-tonk show." Cherry Poppin' Daddy StrutComment
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Hey Jerry. My Yamaha manual says the stroke on the XS is 68.6mm. Now I dont know if the XJ is any different but I ran the numbers on a displacement calculator for yours and wow!
Bowling's Engine Displacement Calculator
Input Parameters Are the Following:
Number of Cylinders are = 4 to 1
Piston Diameter = 80.000 Millimeters
Piston Oversize = 0.000 Millimeters
Engine Stroke = 68.600 Millimeters
Computation Results:
Computed Engine Displacement (CID) is 84
Computed Engine Displacement (Litres) is 1.4
Computed Engine Displacement (CC) is 1379.32-79 XS1100 SF
2-78 XS1100 E Best bike Ever
80 XS 1100 SG Big bore kit but not fully running yet.
Couple of more parts bikes of which 2 more will live!Comment
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