Namura Pistons

[automan]

I heard they were junk, they are great...

What's the real story?

Not a cast vs. forged discussion, just Namura.

thanx

cliff

[m in sc]

i had one fail out of the box years ago. nope.

theres so many options these days, no point in using them. .02

[rodneya]

You could buy a set on ebay a few years ago for $14. That should tell you all you need to know about the quality

[Vintagetz]

I heard you could read the Budwiser label on some of them.... 

[automan]

Not much info here.

cliff

[Vintagetz]

The reputation of the Namura brand is they are weak and poor quality.  Quite a few years ago I remember reports of the skirts failing.  I have had great service out of the  Vertex brand in my race bike.  I have never had one failure in spite of the abuse

[jradnich]

 I did a search on them and there is a lot of talk about them on Thumpertalk. Mostly positive, so I bought one for my DT125. But, on advise from members here, I never used it. It still sits on my shop bench. When it comes down to it, I trust the advice of people on this forum. If you're looking for inexpensive pistons, I used Cruzinimage pistons in my RD400 with no problems with a couple of thousand miles on them.

[m in sc]

agreed in the cruzin image pistons. have them in my t500, zero issues for the past.. 5? years.

[Striker1423]

Cruzinimage pistons will be going into my GT750.

[automan]

 
Finally some feedback other the beer cans.

Do you know the cans are of the best and purist aluminum?

How else can they extrude a 5/1 profile?

Spices in the mix makes the alloy's, boys.

cliff

[Vintagetz]

Virtually all Aluminum is "best and purest"  based on the application.  One of the issues with Namura RD pistons is the skirt and window profile. 

[m in sc]

mine was a casting flaw. I have a picture somewhere but you can see the inclusion where it broke. oddly they seem to be (more?) popular with the banshee guys.

[Evans Ward]

A few years back, I used a Namura piston/ rings in one of the Polaris Trailblazer 250 2 Stroke ATVs we owned. That TB250 was beat on and the engine ran great. It wasn't my choice of piston but was able to purchase it at a great price which mattered as we owned 5 different ATVs then. (3 TB 250's, a Polaris Scrambler 400, and a Banshee 350) Personally, I wouldn't put one in one of my bikes though..

[automan]

Same news. Good/Bad.

Getting nowhere.

If bad, why and how?

cliff

[m in sc]

shitty casting in my experience and hit and miss quality control.  what info are you exactly looking for?