What year(s) is the GG 2 stroke the strongest?
 

From what I've read some years have better CDI's than others. Some have worse tolerances, better pipes, silencers, lighter ignitions etc , etc. When jetted correctly, is there a year that stands out stronger than others? What is your experience with the bikes EC, MC, DE, XC 97'-13' and why is it stronger? Or are they all within a horse or two of one another?

The 2013 euro r has a new cylinder which makes it a stronger performer than my 2011 with s3 high high head, which was much stronger than stock and that stocker was much stronger than a 2007 I've ridden.

The older XCs ('99 - '02)were strong runners, with high comp MC heads and more aggressive CDIs.
IMO, '03 and '04 were the softest, full euro spec bikes. After that it got better again. My '07 was easily the strongest running GG I've had or ridden. I knew this from the first spin around the dealers lot when I picked it up, it's just plain fast and still is. The '12 is fast too just took more time to get there. I can't say if and what any porting changes were, but there is enough slop in the sand cast cases to allow plenty of variability. My '00 XC had some evidence of casting cleanup with a porting tool from the factory.

Noah,

Your bike should be a strong running 250 if it started life as an '00 XC. If you have the 2k-2 ignition you most certainly have the hotter MC CDI, or CDI from a 200 that uses a more aggressive curve. Thats the way Don Knight had them set up. If it has the 2k-3 then maybe it started life as an EC spec bike. Back in '00 there were some ECs as well, as XCs. If you want a little more, there are ways without going crazy. Have the head modded to correct the squish and maximize compression. Replace the RAD valve with a VForce, this was a biggie on my '03. You have to smooth the cases in the reed block area for this. They also benefit from a slight timing advance if running the EC CDI. The JD Blue needle rips in the old carbs.



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My 2013 is a monster, must strong than the 2011. It could be the 50T rear that is on the 13, which I like better now that I have gone down to a 48T rear.

I'm very happy with how my bike runs, not saying I won't do the head at some point. Mine is the EC with the 2k-3 ignition. I had a chance to ride a bone stock 04' EC250 and the 04' does feel light on power in comparison. I was just curious as to how the engine has evolved over the years. BTW I wasn't overly impressed with the power of my buddy's new 300 orange bike:confused:

Is it better to modify the MC than the EC head? or will they both end up with the same specs after the RB mod?

Just start off with a .5mm base gasket, measure squish and compression and send him your current head.

I will have a spare 2K-2 ignition system and 200 CDI for sale once my bikes are gone. That will make it really rip.:D

how much difference is there between an mc and an ec head ?

just wondering as mine is an mc..

The squish band in more narrow and compression higher. Can't say for sure how much though. My '00 had the MC head as well. All else being equal it should just give a bit more torque. Nothing is as good as a proper mod like done by RBD.


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