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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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#1
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High Compression Head
I just picked up GG brand high compression head(part# ME25-30916000). Anybody out there have any experience with these?
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#2
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Not with that particular head, but my stock head had a couple thousandths shaved off of it and it works pretty good. Has more bottom and hits a little harder.
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Blanco Current ride: 2009 WR450 Previously owned: 12 Gas Gas XC300R, 06 WR450, 06 YZ250, 05 Gas Gas EC250, 05 KTM 450EXC, 02 KX250 w/EG310 kit, 03 YZ250F |
#3
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Quote:
Ron |
#4
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I'm pretty sure mine is ME25-30'8'16000 vs. ME25-30'9'16000. Hope I haven't been duped! They claimed it was from dealer edition motorcycles offered by Don Knight and that it differed from the stock heads.
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#5
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Hi gasIdaho,
I am not really sure about the numbers my self. A long time ago I wrote the numbers that were on a gasgas 250 head that I was working on (thinking that there were different numbers between the 250 and 300's, but not so). Every time I do head work on the gasgas, I will compare the numbers. Each time they read ME25-3091600 and it does not matter if it was a 250 or a 300. I have always assumed that the cast in number was just that, a casting mold number. The 250 and 300 heads are the same casting as far as I can tell, they are naturally machined differently. It will be nice to hear how the new head works. Ron |
#6
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Ron is correct. I have an '07 250 and an extra head from a '02 XC250. The '07 has slightly different machining on the top of the head for clearance using 13mm hex bolts rather than cap screws. Both heads are ME25-30916000, its the same casting. There are high compression heads, and likely yours is one. Measure the squish band width, I was told the the hi comp heads are cut narrower than the standard EC heads, on the 250s anyway.
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#7
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My 2001 SE250 was supposed to have a high compression head on it.
Which it didn't. After having Ron machine it, it ran 10 times better. |
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