EC 250 to 300
Hello everyone
I got an EC 250 2011 and I must replace the cylinder. I'm thinking to use a 300 cc kit, but the cylinder head comes without support for the brackets. Do you think that I will have problem? Thanks a lot |
The 250 and 300 heads use the same support brackets.
The cylinders use the same powervalve assembly. |
The cylinder head that I found is without support.I think that is from 2014 or later. Do you think that this will be a problem?
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Get the right cylinder head. The support brackets are there for a reason...
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A couple more options: 1) rechrome your cylinder and keep it a 250. 2) Have your cylinder bored to a 265cc (they will weld and cut your head to match the larger bore. 3) Get the 300 cylinder and have your head welded and cut to match the 300 cylinder.
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Quote:
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https://www.millennium-tech.net/
or https://www.usnicom.com/DirtBike/CylinderPlating You should double check to see if either of those two places can weld and cut your original 250 cylinder head to work with the 300 cylinder. That is a common service for big bore kits. |
Quote:
Thank you. Sorry for confusion. I doing opposite here. Going from a 300 to a 250 since my 300 overheated. See pics below. I’m actually thinking I’ll install the brand new 250 cylinder on my 300. This way I can ride for the summer. And I’ll send my 300 cylinder in to see if fixable. Since I have a 250 “A” cylinder. I need: ? Anything I’m missing? 250 head 250 “A” piston Gaskets You think my Lectron will still work on the 250?https://uploads.tapatalk-cdn.com/202...61397034a5.jpg Sent from my iPhone using Tapatalk |
Lectron should work fine. Just will probably have to retune it richer for the 250. That cylinder can be fixed by Millennium. I've seen them fix worse.
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