|
Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
|
Thread Tools | Display Modes |
#1
|
||||
|
||||
125 compression
i had an off on the weekend and cracked the ignition cover, so i took that off and discovered that i could turn the engine over very easily with my hand by turning the ignition
is this normal for a 125? it feels like it has very little compression, is it supposed to be like that to mellow out the power? or do i need new rings? any ideas would be appreciated its an 07 ec 125 btw |
#2
|
||||
|
||||
Quote:
Anyone can conferm this?
__________________
2002 Gasgas EC250 (gone not forgotten) 2012 Ktm 300xc 2001 Gasgas EC300 Lifes journey is not to arrive safely at the grave in a well preserved body, But rather to skid in sideways totally worn out shouting holy cow what a ride !!!! |
#3
|
||||
|
||||
Turning a 2-stroke over slow by hand allows compression leakage through the rings, thats why you kick it fast for a check with a guage which is what you should do.
|
#4
|
||||
|
||||
Silly thought - as you whacked that side - the crank is turning as well as the flywheel? You haven't broken the key in the impact? As GMP says you can turn it slowly but you should feel considerable resistance until the air leaks past.
|
#5
|
||||
|
||||
Quote:
|
#6
|
||||
|
||||
Quote:
so yes the flywheel is still connected to the crank, unless it broke on the way home while sitting on the trailer |
#7
|
||||
|
||||
Quote:
is that ok? |
#8
|
||||
|
||||
I don't know for a 125, you'd expect more for a 250 /300 but it sounds enough to start it to me.
|
#9
|
||||
|
||||
That may be a little low for sea level or it may just be the gauge, they can and will vary quite a bit I cant tell you spec because I dont know exactly what a healthy tiddler should be at, somebody will chime in I'm sure, If it starts ok your prob fine. Keep in mind that a worn piston can still give you good comp numbers. I did a leak down test on my mc and it showed zero leakage but the piston to bore clearance way, way out of spec.
|
#10
|
||||
|
||||
i have been reading around and it seems that your supposed to hold the throttle at WOT and kick the sh*t out of it to get a correct comp. reading, is this right?
i did nothing with the throttle, and i was only kicking it like i would to start it, not like trying to start a hot xr 600 or anything |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
300 compression | stay_upright | Enduro Engine - 2 stroke | 13 | 08-27-2009 05:24 PM |
EC200 compression | Bearman | Enduro Engine - 2 stroke | 8 | 02-22-2009 04:03 AM |
too low compression? | welle | Enduro Engine - 2 stroke | 13 | 04-02-2008 04:30 PM |
160lb compression on my EC 300 | FFRDave | Enduro Engine - 2 stroke | 18 | 02-28-2008 09:40 PM |
Compression low? | Wellsy | Enduro Engine - 2 stroke | 10 | 11-28-2007 07:05 AM |