Jump to content

250 sxf piston?

Recommended Posts

Looking for a piston for my 250sxf, I highly hesitate between Vertex and Wossner pistons(cylinder needs recoating). The Vertex one is cheaper but I can't find an oversize for the bike. IIRC, wossner makes oversized pistons in .025" increment for that bike so here are my choice

1- Get The cylinder recoated and install a Vertex piston

2- Get an oversized Wossner piston and get the cylinder honed

What do you think? 1 or 2? Of course, the second option would be cheaper but what about the reliability of the honed cylinder vs the freshly recoated one?

Share this post


Link to post
Share on other sites

Option 1. Or buy a new cylinder and run an OEM piston. Also OEM has a slightly larger piston option. Possibly use one of those and don’t need to do anything to piston.

Share this post


Link to post
Share on other sites

You can't hone the cylinder a complete piston size. The nikisil will be entirely gone. Just call millennium and do a core exchange with an oem piston which is better then either of those vendors. Even if you use the same vendor as the maker of the oem part , if it isn't an actual oem piston it won't have oem propriety work.

  • Like 1

Share this post


Link to post
Share on other sites

So you highly recommend that I use an oem piston? Because here in Canada they are pricey and as far as I know Vertex make really good piston

Share this post


Link to post
Share on other sites
You can't hone the cylinder a complete piston size. The nikisil will be entirely gone. Just call millennium and do a core exchange with an oem piston which is better then either of those vendors. Even if you use the same vendor as the maker of the oem part , if it isn't an actual oem piston it won't have oem propriety work.

 

I actually have the same opinion as you when it's for my cr250 I only buy oem parts but for that bike I just dont want to put as much money in the engine as I did with my cr after all that's just a 4 stroke...

 

  • Like 1

Share this post


Link to post
Share on other sites
 
I actually have the same opinion as you when it's for my cr250 I only buy oem parts but for that bike I just dont want to put as much money in the engine as I did with my cr after all that's just a 4 stroke...
 

Well, I get it. I just think the newer engines are more advanced and are all so very potent and adjustable it's worth paying more. It's a works bike compared to a cr250....and I love cr250s

Share this post


Link to post
Share on other sites

Well, I get it. I just think the newer engines are more advanced and are all so very potent and adjustable it's worth paying more. It's a works bike compared to a cr250....and I love cr250s

 

That's probably true though. Another option is to get a big bore kit like a 280cc as I plan to use that bike as a wood bike/everyday bike. With a bbk I would get the bottom end power that I need for wood riding but the reliability might get hurt with a kit like that. Btw that's a 2010 250sxf that bike doesn't compare to the newer ones

 

Share this post


Link to post
Share on other sites
The 2010 era one ran hot as a big bore

Thanks for the input! I might consider keeping it as a 250cc do you have any numbers for the temperature?

Share this post


Link to post
Share on other sites

I don't sorry, but as a Mx bike they were fine ,off road enduro etc you needed a fan etc to keep them reliable

Share this post


Link to post
Share on other sites
I don't sorry, but as a Mx bike they were fine ,off road enduro etc you needed a fan etc to keep them reliable


Well good to know thank you! I'll keep an eye on that!
  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


×