Rip Baby Viff.... - Page 2

RedRider2k2 · 07-01-2011, 01:22 AM

You're going to give up on a running bike because someone told you to?

At least run your own compression test.

Porkchop · 07-01-2011, 01:52 AM

Quote:

Originally Posted by RedRider2k2

You're going to give up on a running bike because someone told you to?

At least run your own compression test.

It wasn't running when it left my house. It had what I thought was carb problems, which apparently are compression problems. Its been running and non running, running and non running for a year now.

Wait.... didn't you sell one of these because you wanted something that was more reliable???

askmrjesus · 07-01-2011, 11:05 AM

Quote:

Originally Posted by Porkchop

We don't even know what is wrong yet. He was just guessing. That is why I'm going in tomorrow to talk to them in person and look through stuff.

Though, I already have a guy wanting to take the engine and cosmetics, another guy to take the rolling chassis and title, and another to take the carbs.

It's the "just guessing" part that bothers me.

I ran my own shop for several years, and I can't tell you how many guys would show up with a bike that was pronounced D.O.A by a dealership, only to find out that I could have it running in two days.

The thing is, a lot of shops don't want to fuck with old bikes. Partly, because they don't think you're going to want (or be able to) spend what it will take to fix the thing at a shop rate of $45.00 an hour or more. The other reason? They're lazy, and it's a hell of a lot easier to do brake jobs and oil changes, than it is to actually fix something. Profit, of course, also figures into this equation.

So, back to your bike- Lack of compression is caused one or two reasons (or a combination of one and two) bad rings or bad valves.

The first thing I would ask, would be the results of the compression test. What's the spec compression supposed to be, vs. was the reading was? If it's within 25% of where it's supposed to be, that's usually just normal wear.

Bad rings, as previously noted, is not too big of a deal, unless the cylinders are so far gone that they need to be re-bored. Unfortunately, there's no way to know that without tearing it down, inspecting for pits, and mic-ing the bore to see if it falls within spec. You probably don't have a micrometer that will do that, but a local machine shop could do the measuring for you, for not much dough.

Checking the valves is actually relatively simple. Pull the heads off, and yank the camshafts. All the valves are now, or should be, in the closed position. Place the head on a bench and level it with the combustion chambers upward. Fill the chambers with alcohol. Go to bed. Wake up, and see if the alcohol is still there. Yes? Good. No? Bad. 50% of the valve issues I've dealt with, were caused by carbon build up (caused by putting around at low RPM's). Simply cleaning up the valves and the seats will cure this. If the valves still leak after cleaning, you have bigger issues.

So, all that said, it's easy for some of us to just say "Hey man just, blah, blah,blah" because it's easy for us. It may not be easy for you, I don't know where your skill/comfort level lies, so that's something you obviously have to judge for yourself.

For what it's worth, the symptoms you descried sound more like carb issues (i.e, clogged pilot jets or out of sync) than compression issues, but without knowing the numbers, I can't say either way.

Out of curiosity, how many miles are on this thing?

JC

OneSickPsycho · 07-01-2011, 02:45 PM

Best post I've ever seen from you JC... you should post more on topic content...

Particle Man · 07-01-2011, 03:39 PM

Quote:

Originally Posted by OneSickPsycho

Best post I've ever seen from you JC... you should post more on topic content...

For all the flippant comments, the dude is seriously fuckin' smart

smileyman · 07-01-2011, 03:51 PM

Quote:

Originally Posted by OneSickPsycho

Best post I've ever seen from you JC... you should post more on topic content...

Word!

askmrjesus · 07-01-2011, 04:25 PM

Quote:

Originally Posted by OneSickPsycho

Best post I've ever seen from you JC... you should post more on topic content...

Thanks, but the thing is, up until a year ago, I was (as douche-bags like to say) in the "motorcycle industry". After fielding 20 -30 calls a day, from dudes who just want to blah,blah,blah about the first bike they ever had, where they rode it, etc...I got to the point where I would pretty much rather talk about anything BUT bikes.

Apparently, I'm starting to recover from that...

Porky, one thing I forgot to ask. You said the mechanic mentioned rust on the heads? The heads are aluminum, which I believe is mostly rust free, so....WTF is he talking about? Where is this rust coming from?

JC

RedRider2k2 · 07-02-2011, 12:43 AM

Quote:

Originally Posted by Porkchop

Wait.... didn't you sell one of these because you wanted something that was more reliable???

Mine was bullet proof. It just had soggy suspension and square tires. I bought it for my Girlfriend and it's condition was holding back the progression of her learning to ride. So, instead of spending the money to spruce it up, I sold it for a profit and replaced it with a newer one. But, I did these things based on things that I knew to be true. Not someone else's opinion. That's why I recommend doing your own inspection on it. Dont just take someone's word for it.

The engine in my CBR crapped out on me last fall too. Before I had even rolled to a stop I was already pretty sure what was wrong with it. By the time I got it home I was already going over the process of rebuilding the engine in my head. When it comes to Bikes, I have a hard time affording a lot of repairs on a lemon but I REALLY cant afford to just bail on one and totally lose out.

Rangerscott · 07-01-2011, 06:43 PM

Unless the rust spot is really a hole.

Particle Man · 07-01-2011, 06:43 PM

did you just call him an a-hole?

07-01-2011, 01:22 AM	#1
RedRider2k2 Holier Than Thou Join Date: Nov 2008 Location: N.B, Canada Moto: 06 ZX10R, 18 400 Ninja, 11 KLX250s Posts: 463	You're going to give up on a running bike because someone told you to? At least run your own compression test. __________________ Good judgement is the product of experience...Experience is the product of bad judgement. Sometimes The Faster It Gets, The Less You Need To Know. But You Gotta Remember The Smarter It Gets, The Furthur It's Gonna Go.

07-01-2011, 06:43 PM	#10
Particle Man Custom User Title Join Date: Nov 2008 Location: Central NY Moto: 2003 SV650S Posts: 14,959	did you just call him an a-hole? __________________ I'm not "fat." I'm "Enlarged to show texture." Handle every stressful situation like a DOG: If you can't eat it or hump it, pi$$ on it & walk away.

07-01-2011, 02:45 PM	#4
OneSickPsycho Ride Like an Asshole Join Date: Feb 2008 Moto: nothing... Posts: 11,254	Best post I've ever seen from you JC... you should post more on topic content...

07-01-2011, 06:43 PM	#9
Rangerscott Viff6N Mutated Warrior Join Date: Mar 2009 Location: Texas Moto: '01 Honda VFR 800 & '09 ER-6N Posts: 8,704	Unless the rust spot is really a hole.