BannedCR500Riders.com

As the title states, my 500's cylinder needs to be honed. That and there is no scallop between the exhaust ports. Does anyone know where I might take the jug?

Thank you all!

JT

If it just needs a quick hone for a new set of rings, just pick up a ball hone and spin her yourself, nothing to it. just go easy and brake the glaze.

I do have to put a new piston in it as the old one was cracked on the intake side. So I'm not sure if a bore will be necessary yet.

Thanks for the advice!

JT

DOHCFOX wrote:So I'm not sure if a bore will be necessary yet.
JT

So how do you thing the piston got a crack in it in the first place?

Hint; honing is not the answer.

im in the same boat. mine was cracked. bore is about $60. i dont recomend a cast piston replacement. call GSS for a wiseco, he might still have some the old wisecos with the wrist pin cutouts. or rockymountain for a new wiseco boat anchor for $100

GSS is as close as your nearest UPS depot.

Send it to a place where you KNOW its going to be done correctly ...
( i.e. Torque Plated)

iggys-amsoil wrote:

DOHCFOX wrote:So I'm not sure if a bore will be necessary yet.
JT

So how do you thing the piston got a crack in it in the first place?

Hint; honing is not the answer.

Eh... piston slap? I really don't know.

What I might do (and this could turn into a sticky, maybe ) is document this process and call it, "Engine Rebuilding for the Newbie Retard".

AlisoBob wrote:GSS is as close as your nearest UPS depot.

Send it to a place where you KNOW its going to be done correctly ...
( i.e. Torque Plated)

I'll likely do that! Thank you! Does GSS have a website?

DOHCFOX wrote:

AlisoBob wrote:GSS is as close as your nearest UPS depot.

Send it to a place where you KNOW its going to be done correctly ...
( i.e. Torque Plated)

I'll likely do that! Thank you! Does GSS have a website?

Give glen a call, he did the motor in my 2000 and its a screamer!!!!

http://www.gssraceporting.bravehost.com/

Definatly recommended.

DOHCFOX wrote:[

Eh... piston slap? I really don't know.

BINGO!

Honing will only make it worse..

Time to freshen it up, the right way...

AlisoBob wrote:

DOHCFOX wrote:[

Eh... piston slap? I really don't know.

BINGO!

Honing will only make it worse..

Time to freshen it up, the right way...

How can I identify the piston that came out of the motor? Are there any telltale ways to know if the piston is stock versus aftermarket, oversized, things of this nature?

Toss a photo up, and lets see what it looks like..

You need to physically measure it for its size.

AlisoBob wrote:Toss a photo up, and lets see what it looks like..

You need to physically measure it for its size.

I'll get some photos up shortly.

AlisoBob wrote:
You need to physically measure it for its size.

If stock and oversize it will have have the amount over stamped on the crown, if aftermarket you sometimes have to match up part numbers that are also stamped on the crown.

The right way to do it as bob mentioned is measure it.

Here are a couple of shots of the cylinder and piston:

http://picasaweb.google.com/dohcfox/CR5 ... 9719580690

http://picasaweb.google.com/dohcfox/CR5 ... 4014548002

http://picasaweb.google.com/dohcfox/CR5 ... 6899449906

http://picasaweb.google.com/dohcfox/CR5 ... 1194417218

http://picasaweb.google.com/dohcfox/CR5 ... 9784351826

JT

You need to post a pic of the piston crown (looking directly down on the top of the piston) with the carbon cleaned off (scotbrite pad) so we can work out what size it is.

It looks like a stocker to me.

DOHCFOX wrote: How can I identify the piston that came out of the motor? Are there any telltale ways to know if the piston is stock versus aftermarket, oversized, things of this nature?

See the "ART" marking? This identifies it as a cast piston, it is probably the original from judging by the appearance of the compression releif scallops.

The dark discoloration on the piston bottom shows that the jetting is correct, and the motor has been making some power! ( heat)

Ship it off to Glen for a proper ( torque plated) bore and hone job.

You'll be "good to go" for a few more years...

britincali wrote:You need to post a pic of the piston crown (looking directly down on the top of the piston) with the carbon cleaned off (scotbrite pad) so we can work out what size it is.

It looks like a stocker to me.

I'll clean her off tomoorow and post some pics! Thank you for the advice.
JT

AlisoBob wrote:

DOHCFOX wrote: How can I identify the piston that came out of the motor? Are there any telltale ways to know if the piston is stock versus aftermarket, oversized, things of this nature?

The dark discoloration on the piston bottom shows that the jetting is correct, and the motor has been making some power! ( heat)

Would this mean that the piston crown was getting hot enough to cook the premix and stain the metal black? You can see clearly how the heated area of the piston stretches more towards the exhaust side than the intake side. Very neat indeed.

I just got off the phone with Glen and all I have to say is, WOW! What a supremely generous guy! I asked me all sorts of questions about my riding style and then instructed me on exactly what I need for my 500. Best of all, he really sounded like he enjoyed talking CR500's.

Because I am a pretty relaxed trail rider, he suggested that a torquey combination might consist of:

A Pro Circuit pipe or similar expansion chamber (because I do need a new pipe)
Two stage reeds with my stock reed cage
Cast piston
Proper exhaust port reliefs

I'm excited!

JT

DOHCFOX wrote:I just got off the phone with Glen and all I have to say is, WOW! What a supremely generous guy! I asked me all sorts of questions about my riding style and then instructed me on exactly what I need for my 500. Best of all, he really sounded like he enjoyed talking CR500's.



JT

He really is a cool ass guy