TRX250R.ORG
Workshop => Engine and Bottom End => Topic started by: Brett on February 19, 2014, 03:30:35 AM
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Well I was perusing esr250.com today and just happened to be looking at their two plug head and it hit me: "Holy poop on a stick, I could run a compression release on my R!" So I jumped on google and after about 10 minutes of searching I found myself the release I wanted and couldn't be more happy. I remember being younger riding my dads 71 Yamaha HT-90 and that was my first experience with one. I remember it being awesome on steep hills and any slippery situation. I'll let you guys know how it goes, I'm sure most will call me dumb for installing one but in some situations they are better than brakes and no they don't suck in dirt.
-Brett-
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Is that compression release the cable & small lever on the handle bars type.
That is the type most of us used years ago flat tracking, kinda like a jake brake for going into the corner.
Was on e bay the other day, looking salvage dirt bike parts & seen one of the old types we used. Popped right up first thing on the page & I wasnt even looking for it.
Neil
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Is that compression release the cable & small lever on the handle bars type.
That is the type most of us used years ago flat tracking, kinda like a jake brake for going into the corner.
Was on e bay the other day, looking salvage dirt bike parts & seen one of the old types we used. Popped right up first thing on the page & I wasnt even looking for it.
Neil
Yes sir it is! I always used to hit it on my dads dirtbike accidentally
-Brett-
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Yes sir it is! I always used to hit it on my dads dirtbike accidentally
-Brett-
So, maybe pops might have done some flat tracking years ago, cause that is what those compression release were made for, best as I can remember.
If you flat tracked & had a two plug hole head on your enging, it had a compression release in that extra hole.
When you backed off the throttle going into a corner & pull the lever, you could feel a drag on the engine slowing you down just a bit.
Years later though & thinking about the design, wonder how much raw air being sucked back into the cylinder when its opened. Because its not a check valve, its open when the piston going up & then when its going down & sucking in air.
I had a 74 Yamaha 360MX set up flat track I used. That was the meanest bike I ever throwed a leg across in all my life, specially when I first got it & in the MX set up. New low flat track pipe tamed it down just a bit, but that lite switch coming out of a corner was still there.
Neil