Cubs

[JasonGOSU]

I was told by my builder that the cubs are great cylinders for drag racing but not for duning. He says the reason being is that the cubs a nikasil lined and the stock cylinders have a steel sleeve. The nikasil lined cylinders cool down quick and that means you have to warm up your bike everytime you shut it down for a few minutes. The steel sleeves keep more heat it and that's why it's better for duning, because most of the time you scream around and then stop to talk to your buddies. Any truth to this?

[rsheppick]

I have not heard that.

[DIRTMAN350]

I was told by my builder that the cubs are great cylinders for drag racing but not for duning.  He says the reason being is that the cubs a nikasil lined and the stock cylinders have a steel sleeve.  The nikasil lined cylinders cool down quick and that means you have to warm up your bike everytime you shut it down for a few minutes.  The steel sleeves keep more heat it and that's why it's better for duning, because most of the time you scream around and then stop to talk to your buddies.  Any truth to this?

516674[/snapback]

 

I would get a second opinion on that. PM Jeff with Fast and he can give you the correct

info. Not to say that your builder is wrong just on something as that expensive i would want a second opinion that's all.

[chase@miamiatv.com]

who cares let the bike warm up and then still fly by ure friends later =-D cubs overall will make you more hp for less $

[RNBRAD]

Honestlly, if a builder told me that kind of crap, I'd be finding another one real quick. A banshee's motor needs to cool better, especially with porting, pipes, cub and other mods we do. That's why the aftermarket has cool heads, better impellers, larger radiators, Nikasil plated cylinders, and special coolants to combat heat. Anyone tells you that dissipating heat quicker is a bad thing, you tell them to go jump off a cliff. That has to be one of the lamest reasons for not to use a nakisil plated cylinder I've ever heard, really it's the only one. Cubs make outstanding dune motors. I've had every level of modification inbetween from stock cylinder to a 4mil cub and the cub is the best dune motor I've ever ridden bar none!! You tell your builder to find a tree with better shade cause the sun has fried his brain.

[Fireroad Express]

most snowmobile manufacturers are using nikasil lined cylinders now and have been for a while. i don't think there is any issues with nikasil lined bores except they are expensive to replate when you squeak a piston and damage the aluminum underneath the nikasil. they make more power,run cooler, disapate heat better and (im guessing on this one) heat up quicker than iron cylinders. in very cold climates you have to warm up your machine to avoid a cold seizure but i can't see it being a problem in the desert. your builder has either misunderstood your question or has been "touched by the sun god"

[csrmel]

many oem's use nikasil including porsche, bmw motorcycles etc. if there was the slightest problem with nikasil and warming up you can bet that no oem's would be using it at all for fear of warranty problems.

[dajogejr]

ALL SX/MX bikes use Nikasil, and if they don't abuse the hell out of their bikes, I don't know who does. Wide open for a 1/2 hour outdoors...each moto, plus supercross.

 

Granted, never rip off on any bike cold. Good idea to warm up anything, I don't care what it is...

 

Dunes need horsepower, Sand sucks power, Cubs make power. It's that simple!!

[Animalman294]

I too have never heard anyone say that, well until now. But think about it, even if it were true, which I say is crap, but the worst thing is you would let it cool down and warm up gradually. Which technically, is a good thing anyway, but I do not think that it is a neccesity. I think you need to look for a more knowledgable builder, or explain your question better to your existing one.

 

The cub will be a lot faster, but hey, listen to your builder and then look for me at Sand Mountain NV. Dumont or Glamis. I'd love to race your alternatively build Shee.

 

Good luck man...............

[rocketboy]

my opinion is the guy is partially correct i nthat they are different rates of thermal expansion , but the tempetaure coeffecient of the 2 sleeves isnt so drastic as to rule one is better for a certain type of riding over another , Nikasil is superior in many ways but has its problems.. especially if theres a leak int othe cylinder the rapid tempeture change wil l flake the nickle right off the bore and cause severe damage .keep in mind weather it be a iron sleeve or a nikasil lined bore it is surrounded by same 190 degree tempeture coolant ,so i cant imagine theres gonan be a huge issue ,also the clearance for the 2 are different and already accounts for these expansions of each setup ...so theres much to consider ,but i wouldnt say a cub would be a poor duner over a oem type jug .maintenance and proper setup are whats gonna determine the reliabilty and longevity regardless .

[No Limit Powersports]

Because the cubs are nickel plated there isnt as much need to warm up the cylinder as the steel the cubs are plated but still aluminum just like the pistons therefore they expand at the same rate, the steel liner expands at a slower rate than the aluminum piston, thats why you hear of guys cold seizing motors because the piston expanded faster than the cylinder. Ive been to alot of drags with Calvin and I gaurantee you he never breaks in anything or warms anything up, on his nickel cylinders of course. He just dont believe in it. Not by any means saying not to warm up a bike I do it everytime but thats what the man that built the cylinders do??