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Very Active Member
 Originally Posted by 2dogs
and I can still read the lettering on the center rib of my rear tire. 
Not while you’re riding I hope, 2dogs?
Pete
Harrington, Australia
2021 RT Limited
Setup for Tall & Big.... 200cm/6'7", 140kg/300lbs, 37"inleg.
HeliBars Handlebars
Brake rubber removed to lower pedal for easier long leg/Size 15 EEEEW boot access.
Ikon (Aussie) shocks all round.
Russell Daylong seat 2” taller than stock (in Sunbrella for Aussie heat & water resistance)
Goodyear Duragrip 165/60 fronts (18psi) - provides extra 1/2” ground clearance.
Kenda Kanine rear.
2021 RT Limited , Brake pedal rubber removed for ease of accessing pedal with size 15 boots. Red
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Once in a while...
Open it up a bit. Keeping the RPM's below 4K ALL the time is not desirable according to several techs I talked to. Especially on low mile engines. I know rebuilding car engines they get a "lip" in the cylinder where the top of the rings stop in the cylinder. The tech said same thing happens in all engines. So once in a while when engine is hot I'll open it up and shift higher, cruise at 6K for a mile or two. He basically said if I ran at 4K or less all the time, that one time I need to open it up and get outta dodge the pistons reach a tad higher (microinches, but still) and the rings hit this lip and crack.
May or may be a thing, maybe someone here can confirm or deny. I like to open it up anyways, shift high around 5K once in a while, like getting on the highway. Holy cow this 1330 engine is awesome! 
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Floating Your Goat.jpg
You don't need excuses to rev it up a bit: it's your bike! 
BYW: that's all ancient history based upon technology long forgotten...
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Very Active Member
Originally Posted by stevencovert
Open it up a bit. Keeping the RPM's below 4K ALL the time is not desirable according to several techs I talked to. Especially on low mile engines. I know rebuilding car engines they get a "lip" in the cylinder where the top of the rings stop in the cylinder. The tech said same thing happens in all engines. So once in a while when engine is hot I'll open it up and shift higher, cruise at 6K for a mile or two. He basically said if I ran at 4K or less all the time, that one time I need to open it up and get outta dodge the pistons reach a tad higher (microinches, but still) and the rings hit this lip and crack.
May or may be a thing, maybe someone here can confirm or deny. I like to open it up anyways, shift high around 5K once in a while, like getting on the highway. Holy cow this 1330 engine is awesome!
See if you can find out if the Spyder 1330 cylinders are Nik A Sil. I beleive they are. The likelyhood to wear a ridge is almost nil in that case.
Old school iron liners will form a ridge.
Much of this is based on ring technology.
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Originally Posted by PMK
See if you can find out if the Spyder 1330 cylinders are Nik A Sil. I beleive they are. The likelyhood to wear a ridge is almost nil in that case.
Old school iron liners will form a ridge.
Much of this is based on ring technology.
Well I learned something! Love this forum! Showing my age worrying about ridges...
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