small hole in the barrel

[kevin iddon]

ec 250 on a 2008 just stripped bike yesterday and was wondering what the small hole above the exhaust port is for in barrel
thanks kevin

 

[dzhitshard]

ec 250 on a 2008 just stripped bike yesterday and was wondering what the small hole above the exhaust port is for in barrel
thanks kevin

Compression release to aid in starting.

 

[gasgasman]

I think only the 300s have the hole.

 

[Jakobi]

I think only the 300s have the hole.

Yep. All my 250 jugs dont have the bleed. The 300's do!

 

[(F5)]

So just of interest If you hold a ruler next to the bore does it read 72mm?

 

[Jakobi]

...or 66.4mm