vitos superstock piston review

[WINDYCITYJOHN400]

ive heard about the rings catching on exhaust ports, and due to the short skirts they wear out faster..... just what ive heard....

 

 

We "Hear" alot. But it's never a guy willing to admit he had a leaky air filter connection that let a boatload of dirt into the motor. Or the guy who runs cheap old gas station 2-stroke oil in his mix. Or the guy who put a piston in that would increase performance, yet he never re-jetted.

80 hours now, on Vito's pro stock pistons with a good synthetic oil and we can still see the cross hatching on the cylinder as well as the machining grooves on the piston skirts. (We just pulled that motor for his bike make over, and I looked at the pistons yesterday. MINT)

I'd highly recommend the pistons for a re-build if you want a quick boost in power without the cost and effort to get porting.

[jbooker82]

I just do a mexican bore job. Run it with out any air filters until I can fit the next size piston.

[supersider]

We "Hear" alot. But it's never a guy willing to admit he had a leaky air filter connection that let a boatload of dirt into the motor. Or the guy who runs cheap old gas station 2-stroke oil in his mix. Or the guy who put a piston in that would increase performance, yet he never re-jetted.

80 hours now, on Vito's pro stock pistons with a good synthetic oil and we can still see the cross hatching on the cylinder as well as the machining grooves on the piston skirts. (We just pulled that motor for his bike make over, and I looked at the pistons yesterday. MINT)

I'd highly recommend the pistons for a re-build if you want a quick boost in power without the cost and effort to get porting.

x2!

[guns4children]

I wouldn’t want my pistons to fail but I wouldn’t feel too bad about it. If I could do it all over again I would have just gone with the 4mill servile. I wish I would have found this site before I did my top end.

[WINDYCITYJOHN400]

I wouldn’t want my pistons to fail but I wouldn’t feel too bad about it. If I could do it all over again I would have just gone with the 4mill servile. I wish I would have found this site before I did my top end.

 

X2 on your Serval comment.

But that's ALOT more money than just 2 pistons for under $200. Alot of guys don't have that kind of cash. (Don't forget Servals require carbs/intakes and pipes, etc.) That's why the prostock pistons are a nice deal for a rebuild. You get added performance, for a standard piston price.

[guns4children]

Damn. I always thought that you could just use a good set of pipes and your stocker carbs. I was thing I spent about 170 bucks on the top end kit from eBay. And then I got fucked and spent another 50 for some bitch to mill my head .20 and another 150 to bore my cylinders. (I know I took a fucking) so that’s 370 hell I would have loved to throw and extra 8 or 9 on top of that and have one of the best trail coal hill setups. I know like you said it’s a lot more money but I’m sure I’m going to have one or something very similar to that when the time comes for another build I would have just saved 370 in the long run.

[WINDYCITYJOHN400]

No, the Serval kit needs some 35 PWK's for carbs. (That will require different intakes than stock) Then your going to want CPI's or SHEARERS for a pipe. So costs add up quick. That's why every choice you make in a build has to fit into an overall plan. I personally think that the new Serval cylinder has eliminated the reason to port a stocker. You can get awesome HP and Massive torque from the Serval compared to a ported 4mill stock cylinder set-up. If your on a budget, the Vito's Pro Stock pistons act like a 1/2 port job and sell for less than $200.00. So in my view, the step cost wise from stock with a piston change to Serval is kind of large, but the only thing that I think fits price wise between those two choices, is to buy an already built ported set-up or an already built 4 mil combo from someone who is upgrading. Others will disagree I'm sure, but for the money, why would anyone build 370 Long rod motors or ported stock cylinder 4mill dune motors, when you can get all that Serval power in a bolt on kit that runs on pump gas and makes 80HP and 50Ft Lbs. of torque?

[too_fazt]

could the serval benefit from bigger carbs...yes......do they NEED them to run better then the stock setup.....NO!.....if ur going to rebuild and are debating upgrading....JUST DO IT!. best money youll spend, and when you want to go faster, or ur clutch starts slipping, or u cant shift worth a damn....UPGRADE SOME MORE. thats what im doing, just with a cub. by far the funnest money iv spent on this bike.

[dsimo]

Vitos pistons are good pistons, but be careful if you are running a long rod setup! I ran these in my banshee, along with a 4mill long rod and space plate and stock pipes (Yes stock pipes) and plus 4 on the timing I noticed a huge power difference I went from 200 mains to 270 and its did not seem to be running rich at all! My banshee was a total sleeper I would consistently win races with piped banshees, that was the good. The bad was my motor only made it about five hours. the pistons held up just fine until they broke off the rod. My crank had maybe 40 hours or less on it, and the general theory is that the combination of the extra weight of the piston and the long rod may have had something to do with it. that being said, maybe I had a weak rod or maybe it had a crack in that I did not see when i rebuilt it. I am not entirely blaming the pistons I am just putting the warning out there. I would have never thought that the little bit of extra weight would make a difference but my buddy who is a 2 stroke engineer seems to think that had a lot to do with it. The piston rod could have broke for a number of reason but it does seem a little weird that I got 40 hours of reliable operation out of the crank then five hours with vitos piston the rod broke .

[WINDYCITYJOHN400]

I'm not aware of all your details...but I've got a 4mill long rod with a 72mm piston swinging on that same type of rod and the weight isn't an issue.

I've also got a stock stroke long rod motor with a 66.75 blaster piston too. Also the 4mill 65 bore 385 motor with the Vito's "Super Stock" piston that had 80 hours.

Now if your running the Vito's stcok replacement piston.....I don't like those at all!

But I can't say enough about the "Super Stock" pistons.

[armyvet]

just like anything else results will vary.Putting new pistons in worn out bores is going to cause problems regardless of make.Hell i had a set of namura pistons in a banshee a few yrs back that never gave me problems.Cant cut corners because one doesnt want their banshee down and avoid bore jobs.