compression specs

Got questions? We got answers....
Post Reply
User avatar
frankenschwinn
Supporting Member II
Supporting Member II
Posts: 482
Joined: 01:20 pm Nov 28 2009
Country:

compression specs

Post by frankenschwinn »

What should compression test yield. mine is at 155.

Got the bike running though
User avatar
Indawoods
Creator and Founder
Creator and Founder
Posts: 9951
Joined: 09:59 am Jun 12 2003
Country:
Location: Midwest

Post by Indawoods »

155 is real good!. . . . . proceed!
*** Administrator //***
****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
User avatar
rbates9
Supporting Member II
Supporting Member II
Posts: 3164
Joined: 06:07 pm Apr 27 2010
Country:
Location: UPSTATE New York

Post by rbates9 »

My book says 95-150 is good.
bmiller
Member
Posts: 154
Joined: 09:31 pm Sep 01 2010
Country:

Post by bmiller »

95-150 seems to be a massive range in "acceptable".

I'm assuming this is a scale with 'wear-n-tear' in mind.

would a 95 mean "you'll need a new top-end soon"

and

a 150 mean "it's pretty fresh?"
User avatar
Indawoods
Creator and Founder
Creator and Founder
Posts: 9951
Joined: 09:59 am Jun 12 2003
Country:
Location: Midwest

Post by Indawoods »

That's the way I would interpet it...
*** Administrator //***
****'95 KDX 200/****

"People ate cows a thousand years ago for the same reason we eat them now. Cause they are easy to catch.We're not savages,we're just lazy. A cheetah could taste like chocolate heroin. But will never know. Those bastards are fast!!! "
bmiller
Member
Posts: 154
Joined: 09:31 pm Sep 01 2010
Country:

Post by bmiller »

>|<>QBB<
Indawoods wrote:That's the way I would interpet it...

Sounds like a good "sticky"....
User avatar
rbates9
Supporting Member II
Supporting Member II
Posts: 3164
Joined: 06:07 pm Apr 27 2010
Country:
Location: UPSTATE New York

Post by rbates9 »

Personally, I would probably do a top end when it got down around 120 but to each there own. And the wide spec is probably just a range that it will still run at?
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Post by Julien D »

My 89 manual says 119 - 185psi. I had about 170 immediately after my last top end.
Image
User avatar
rbates9
Supporting Member II
Supporting Member II
Posts: 3164
Joined: 06:07 pm Apr 27 2010
Country:
Location: UPSTATE New York

Post by rbates9 »

>|<>QBB<
rbates9 wrote:My book says 95-150 is good.
That is from a 97 kdx 200 book.
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Post by Julien D »

Yeah, for some reason the H series had lower compression specs than the E's.
Image
User avatar
rbates9
Supporting Member II
Supporting Member II
Posts: 3164
Joined: 06:07 pm Apr 27 2010
Country:
Location: UPSTATE New York

Post by rbates9 »

What is the lowest anybody has had on a "running" bike? How low can you get and still have it run? :hmm:
User avatar
fuzzy
KDXRider.net
KDXRider.net
Posts: 3437
Joined: 01:29 pm Jun 18 2003
Country:
Location: Fredneck, MD

Post by fuzzy »

They will continue to run for a long time...to the point that the bike is unrideable because the engine will only run in the upper 50% of it's range, and be down on power at that (of course).
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
User avatar
Mr. Wibbens
KDXRider.net
KDXRider.net
Posts: 4884
Joined: 02:57 am Nov 07 2004
Country:
Location: Playing in the Poison Oak
Contact:

Post by Mr. Wibbens »

I think mine was still around 155 around the time I did the topend. +6 years and thousands of miles
Warning! This member tends to use sarcasm as a regular form of communication. If a post seems offensive, before you panic and fly off the handle, re-read the post and imagine it being said with a sideways grin.
((Bike Profile))
((Pics))
FIVE OUT OF FOUR PEOPLE DONUT UNDERSTAND FRACTIONS
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Post by Julien D »

Not sure what mine was when i tore it down. But from a visual of the piston and cylinder, it couldn't have been much. Still ran good though, lol.
Image
Post Reply