Wiseco Forged pistons

[2strokespirit]

A lot of builders i know says, stay away from a forged piston in a 2 stroke motor, they seize up for nothing?. Is that true? I am a builder myself, never use wiseco although i like them, ever other builder in SA wil tell u to stay away from a wiseco forged piston (or any forged piston). What is your experience, cause i want to rebuil and try them out.

Thanks

[differentstrokes]

I have forged wiseco's right now (Vito's), and I've heard something similar about forged. I think the problem was that they expand and it causes the rings to wear really fast. The top ring can become pretty much useless in as little as 5 hours of run time from what I understand. :shrug: I'll just continue to run my pistons until something else happens I guess, I just can't justify swapping them because of "what if's".

[Tim C]

I've run a couple sets of forged pistons without any problems. I think the problem is that you can cold seize them alot easier then a cast piston - you have to warm them up properly. You also have to run more clearence then with cast piston - that is where alot of people make the mistake of thinking they can bore the cylinders and run regular piston clearence (Yamaha specs).

 

If you run the proper clearence and warm it up properly before driving you should not have any problems with forged pistons

[jbooker82]

A lot of builders i know says, stay away from a forged piston in a 2 stroke motor, they seize up for nothing?

 

If your builder tells you that, then I say you need to switch to a different builder.

 

Why would they tell you to run a piston that is weaker? That makes no sence. The reason shy the would seize is because of wrong clearance, lean jetting, or not letting them fully warm up. Any builder that makes real horsepower is going to run forged pistons.

 

Cast VS. Forged

[lowriderb]

9 times out of 10 if the motor seized then it was probably operator error by either not tuning the motor or letting the motor warm up to operating temp before tearing off on it..

 

ive ran wiseco pistons in all of my motors and havent had one seize on me, though i have melted through a couple.. but thats a different story..

[Lethaface]

9 times out of 10 if the motor seized then it was probably operator error by either not tuning the motor or letting the motor warm up to operating temp before tearing off on it..

 

ive ran wiseco pistons in all of my motors and havent had one seize on me, though i have melted through a couple.. but thats a different story..

 

 

Does that story involve a bug in a main jet?? :laugh:

[lowriderb]

a nat in the inlet side of the float valve on one mikuni carb will drive you nuts..

 

 

 

i got own3d by a nat for like 150 bucks worth of 795 series pistons.. ::

[Animalman294]

That sucks, how did the nat get by the filter............... :beer:

[lowriderb]

im not entirely sure, till i found it the motor wouldnt run or would lean out till it got progressivly worse till it wouldnt run at all past idle.. it did it since i got the carbs so thats the only explanation of it that i could think of, found the nat and then ran great..now i dont need the carbs (go figure..) guess you can say the banshee's dont like the "nat mod" to the carbs..lol