Don't know or have any real techy stuff to add but, there is probably a realy good reason why they stopped making them one way for the other
Maybe in dirtbikes, but every sportbike I have ever overhauled has had steel liners. Even my 2005 SV1000 had steel.There is a reason every high performance dirt bike runs nikasil.... or are they crazy..... even the XRR runs a nikasil bore.
Read on…nikasil is much toughter then untreated iron liners. if we didnt have nikasil we would be boring our cylinders every couple piston changes. kind like we did in the old days. nikasil resist wear allowing the use of hardend crome rings
I think you mean Galling. http://en.wikipedia.org/wiki/Gallingif serviced regularly nikasil will last much longer than steel bore.steel liner wont resist gaulding like nikasil will
What are the piston dimensions on your gsxr's. What is the oil capacity? (600-750cc)Exactly! I am wondering the same thing!!! My bike lives in the 40-60% rpm range.
Why is it that my low compression nikasil bike will most likely last way less than half as long as your high performance sport bike? Is it because of where it lives in the rpms?
Model: XR650R
Engine Type: 649cc liquid-cooled dry-sump single-cylinder four-stroke
Bore and Stroke: 100mm x 82.6mm
Compression Ratio: 10.0:1
Valve Train: SOHC; four-valve
Exactly! I am wondering the same thing!!! My bike lives in the 40-60% rpm range.
the only thing I would question is the steel in sportbike cylinders as I could sware they have neen nikasiled since the early 90's. Then again the last cylinder I saw was off an 08 F6.
More like, watch a 1 legged 40lb dog walk next to a 4 legged 40lb dog, lol.A single cylinder engine uses more energy to get to and maintain 65mph than a 4cylinder. Therefore there is more stress and wear on the internal engine parts. Watch a small dog try and walk next to a large dog and notice that the small dog uses 16-20 steps for every 1 step of the larger dog.
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My 05 SV was steel, my 1990 Katana was steel, and my 1993 through 2001 GSXRs are steel. My dirtbikes are ALL steel. In fact I have owned just under 30 motorcycles in the last 10 years. Every single one, Except an 89 KTM250 (which ended up costing me over $1000 in cylinder work) is steel.
Some will say, "oh dan... you've never had a new bike in your life!" And you would be rightI live in the 90's