compression problems 400

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Feb 17, 2008 | 07:42 PM

pssmith

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Weekend Warrior

Joined: Feb 2008

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compression problems 400

i baught a 400 and only have 30 lb of press what should it be it has set up for 2 years

Feb 17, 2008 | 07:45 PM

RickRitter

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Joined: Oct 1999

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compression problems 400

In good condition you should 120 lbs .

The engine will likely not run at all at anything under 95 .

Feb 17, 2008 | 07:56 PM

pssmith

Thread Starter

Weekend Warrior

Joined: Feb 2008

Posts: 6

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compression problems 400

think rings are just stuck

Feb 17, 2008 | 08:35 PM

ftwflh

Quad Patrol
Don't let the hp numbers fool you. Its all in how you get it to the ground. Clutching clutching clutching!

Joined: Apr 2000

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compression problems 400

Best bet is a new piston and bore job

Feb 17, 2008 | 09:18 PM

stendori

Super Quad Patrol
I'm watching you!

Joined: Jul 2003

Posts: 14,269

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From: central maine

compression problems 400

i wouldnt even try to unstick them, just replace and bore it if it needs it.

Feb 17, 2008 | 11:59 PM

RickRitter

Pro Rider

Joined: Oct 1999

Posts: 1,268

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compression problems 400

https://atvconnection.com/D...h/Cylinder-Boring.cfm

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