Anyone have any reviews on these Aluminum kits???
If you ride one, how do you like it? Other peoples opinion on it?
Should I just stick with a cast iron?
KRS Aluminum Big Bore Kit?
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- Spree
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KRS Aluminum Big Bore Kit?
'07 Honda Goldwing 1800.
07' Honda CBR 600rr
'97 Honda Elite- parts bike
98' Honda Elite SA50 SR(85cc plus all bells and whistles)
00' Honda Elite SA50p S
83' Honda PAII (not running)
07' Honda CBR 600rr
'97 Honda Elite- parts bike
98' Honda Elite SA50 SR(85cc plus all bells and whistles)
00' Honda Elite SA50p S
83' Honda PAII (not running)
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- CBR1000RR
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- Wheelman-111
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Nicasil
Greetings:
I see a KRH bore kit on Daywot's store. I have NO experience with this specific setup. The price is attractive. The story reads that this is a Nikasil-lined bore. I do know a thing or two about that.
Compared to many other alloys, Aluminum is a great heat condutor. That's a useful in a high-output engine application, as it runs cooler than an iron sleeve. However raw Al has poor abrasion resistance, making for a short service life as a cylinder.
In 1967 a patent was granted for a hard Nickel/Silicon - Nikasil - coating plated inside cylinders. This stuff wears longer than iron. It reduces friction - and associated parasitic power loss - considerably. Furthermore the thinness of the lining does not interfere with the cooling properties of the aluminum. Thus the engine can be tuned for higher output with less risk of a meltdown.
Read all about it: http://en.wikipedia.org/wiki/Nikasil
One downside is that a Nikasil cylinder cannot easily be rebored or even honed in the event of a piston-related catastrophe. Another is that a poor piston/cylinder size match will not last very long, and cannot be adjusted by boring the cylinder to match an oversize piston.
I see a KRH bore kit on Daywot's store. I have NO experience with this specific setup. The price is attractive. The story reads that this is a Nikasil-lined bore. I do know a thing or two about that.
Compared to many other alloys, Aluminum is a great heat condutor. That's a useful in a high-output engine application, as it runs cooler than an iron sleeve. However raw Al has poor abrasion resistance, making for a short service life as a cylinder.
In 1967 a patent was granted for a hard Nickel/Silicon - Nikasil - coating plated inside cylinders. This stuff wears longer than iron. It reduces friction - and associated parasitic power loss - considerably. Furthermore the thinness of the lining does not interfere with the cooling properties of the aluminum. Thus the engine can be tuned for higher output with less risk of a meltdown.
Read all about it: http://en.wikipedia.org/wiki/Nikasil
One downside is that a Nikasil cylinder cannot easily be rebored or even honed in the event of a piston-related catastrophe. Another is that a poor piston/cylinder size match will not last very long, and cannot be adjusted by boring the cylinder to match an oversize piston.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
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- CBR1000RR
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- Location: Southern Michigan
- Wheelman-111
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Replating Nikasil
Greetings:
Several shops popped up for a Google search of "Nikasil Replate". Easily done for $165-$195./single cylinder.
Several shops popped up for a Google search of "Nikasil Replate". Easily done for $165-$195./single cylinder.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
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- Spree
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- burnt_toast
- Veteran OG
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No experiance with the KRS, but I've ran Airsal T6 aluminum 70cc in my jog style bikes, three of these bores in total and had good success with each setup but one, where piston clip cause failure.
Besides that, aluminum bores do run much cooler, are lighter and can be pretty mean when ported.
Besides that, aluminum bores do run much cooler, are lighter and can be pretty mean when ported.
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