Truly converting a 17 EC250 to a EC300

[flatout111]

Hey guys, so I am contemplating getting a 2017 EC250. When I planned on getting a pre-owned second bike I said my 2 per-requisites were e start and it be a 300. Check on the e start. So I worked out a great deal for this bike but it is a 250 which, I know, are great, but I do prefer the more lugging capibility of the 300. I also think it is better for the extremely technical.

So my question. To truly convert it to being the exact same as a EC300 what has to be done? I want it to be just like the 300 in all aspects, with the exception of paperwork, of course. I need to factor this conversion, if can be done, in on the final costs to make my decision.

Any help would be appreciated. Thanks.

 

[Jacob 'Berg]

To my knowledge, you will need the 300 cylinder, piston, and head.

 

[risk74]

Yup, just the cylinder, head and piston. I've turned several 250s into 300s. If you're in the market, I have a replated cylinder, piston and S3 head for sale with low hours for sale. PM me for details and pictures.

 

[Gasser Nate]

As above and obviously jetting, but do a check on the cdi as well. I think they are the same on gassers though.

 

[Jacob 'Berg]

As above and obviously jetting, but do a check on the cdi as well. I think they are the same on gassers though.

I know the CDI is the same for the 18+ gassers. The dealer let me use a 300 CDI while the CDI from my 250 was sent off to be re-flashed.

 

[flatout111]

Ended up getting a like new 300 cylinder from Jeff at Hall's Cycles plus a new piston and gaskets. This 300 cylinder was from a guy who wanted to do the opposite. He wanted to go from a 300 to a 250 so this will be perfect and about same year, too.

My mechanic wanted to know if the manual has torque values or assembly tolerances but I don't have a manual.

Can anyone assist with this. Jeff said it should bolt right on with no issues but I think my mechanic just wants to be sure.

Thanks for any assistance.

 

[gasgasman]

Torque specs are the same in the '18 manual.

https://www.dropbox.com/s/i93vw77r9kuszxs/gasgas%20workshop%20manual.pdf?dl=0

 

[H0msey]

Have any of you guys done a 125 to 200 conversation? What all would I need to do this? Its an 08 125ec what years parts can use?

 

[Anders]

Have any of you guys done a 125 to 200 conversation? What all would I need to do this? Its an 08 125ec what years parts can use?

The 125 and 200 motors are quite different. The 200 is a scaled down 250/300 with a short stroke crank and smaller bore. None of these parts will fit the 125 cases, I believe.

People have converted their 125s into 144 with great success, but I presume that's how big it gets.