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Wossner


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prelude2.2
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Wossner

Thu May 19, 2022 9:08 pm » Post: #1 » Download Post

Anyone ever used Wossner Pistons?? These seem to be NSR250 specifically made pistons. https://mmgracingstore.com/en/home/5383-602-piston-wossner-honda-nsr250-mc21mc28.html
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prelude2.2
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Sat May 21, 2022 12:03 am » Post: #2 » Download Post

Im half thinking about taking one for the team and testing out these pistons. Any chance of a go fund me Laughing
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bushman
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Sat May 21, 2022 3:08 pm » Post: #3 » Download Post

Why not O.E.M.?
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prelude2.2
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Sat May 21, 2022 3:13 pm » Post: #4 » Download Post

Id like to test them in my MC21. I haven't seen a post here about them yet, apart from a few from over 10 years ago, but those weren't the purpose made NSR ones. I don't mind being the guinea pig. Although if anyone has No mark pistons for my B cylinders I'll take them.
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Andy
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Sun May 22, 2022 12:35 am » Post: #5 » Download Post

bushman wrote:
Why not O.E.M.?

Agreed. I'd take the OEM pistons every time.

Appreciate the "take one for the team" sentiment (it doesn't happen often!), but the genuine ART pistons are second to none.
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prelude2.2
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Sun May 22, 2022 12:42 am » Post: #6 » Download Post

I also agree I would take the OEM pistons everytime. But curiosity is gonna kill the cat. (cat = my MC21 engine)
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Fri Jun 03, 2022 2:56 pm » Post: #7 » Download Post

Look tidy but a single ring piston. Is this for track/race bike? I've been running single ring wiseco pistons in my MC28SP and have been on the cautious side of rebuilds and have been replacing every 10-12 hours. The pistons and rings have always been to spec but with that run time, I'm getting blowby on piston wall. Bike also has NF5 porting.

Take one for the team!
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prelude2.2
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Fri Jun 03, 2022 7:05 pm » Post: #8 » Download Post

This is for my track bike. Although Im not the best track driver so I usually don't wring the neck out of my bikes. Nor do I look for every last drop of bhp.

ooof 10 - 12 hours per piston. that's a terrible return right? But yes I will be taking this one for the team as I have already bought them and it should be all together next weekend (if everything arrives on time).
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Andy
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Fri Jun 03, 2022 8:29 pm » Post: #9 » Download Post

It's not that bad... you'll probably get 3-4 15-20 minute sessions in a morning, and the same in the afternoon on most track days (with 3 groups).

You'll get 4-5 track days to a set of pistons, if you really push it. I guess it depends if you're a real track junkie?

I would however strongly recommend pulling the barrels after every track day, and inspecting the ring grooves and piston thrust faces. You can get the barrels off without removing the heads, to save the excessive cost of head gasket replacement every time.
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prelude2.2
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Fri Jun 03, 2022 8:37 pm » Post: #10 » Download Post

yeah I suppose its not that bad when I think about. especially because you have an NX5. well hopefully these Wossners are decent. i'll keep ye updated with pictures etc
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Sun Jun 05, 2022 1:43 pm » Post: #11 » Download Post

I also usually remove barrel and head together when doing top end.

If possible, measure the weight of these pistons. Go team!
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prelude2.2
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Sun Jun 05, 2022 1:49 pm » Post: #12 » Download Post

I'll try to weigh them when they arrive. Apparently they are 16% lighter than OEM but I guess we'll see about that. GO TEAM!!!
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