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Old 09-28-2012, 06:35 PM   #1
jaredtowne OP
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Best place to send off for valve seat replacement?

Hello all,, I purchased a 87 XR600 kind of blindly, the price was right, I was dieing for a street legal bike, have a NY MCY title for it.. Why so cheap? Motor wouldnt turn - period.

I certainly wasnt afraid, I figured for $150 I could rebuild the whole dang motor and still be alright.

I tore it down, popped the head off, and theres the problem, a chunk of exhaust valve seat sitting ontop the dome.

amazingly the bore is still great, nice crosshatching, no scores.,, shiny wiseco piston, some minor imbedding into the head from the chunk, but nothing to write home about.

Now I have never had valve seats replaced - nor had them fail like this, So I am not sure where / how to fix?

I am quite sure no-one in this po-dunk town is going to be able to perform this for me. we have to ship two towns over just to get a bore job!

Some searching referred me to xrsonly... they list "remove and valve seat - each - $60

I assume thats what I need? I tried contacting them, but have yet to hear back yet.

My question for you guys is... Who do you refer? whats the going rate? should I replace all of them or just the damaged one?

thanks!!
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Old 09-28-2012, 09:21 PM   #2
Walterxr650l
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Quote:
Originally Posted by jaredtowne View Post
Hello all,, I purchased a 87 XR600 kind of blindly, the price was right, I was dieing for a street legal bike, have a NY MCY title for it.. Why so cheap? Motor wouldnt turn - period.

I certainly wasnt afraid, I figured for $150 I could rebuild the whole dang motor and still be alright.

I tore it down, popped the head off, and theres the problem, a chunk of exhaust valve seat sitting ontop the dome.

amazingly the bore is still great, nice crosshatching, no scores.,, shiny wiseco piston, some minor imbedding into the head from the chunk, but nothing to write home about.

Now I have never had valve seats replaced - nor had them fail like this, So I am not sure where / how to fix?

I am quite sure no-one in this po-dunk town is going to be able to perform this for me. we have to ship two towns over just to get a bore job!

Some searching referred me to xrsonly... they list "remove and valve seat - each - $60

I assume thats what I need? I tried contacting them, but have yet to hear back yet.

My question for you guys is... Who do you refer? whats the going rate? should I replace all of them or just the damaged one?

thanks!!
Send a PM to cyclewizard and see if he does them. If he doesn't then XRsonly my be your only option. Honda doesn't sell replacement seats, so anybody that does it will have to be able to manufacture the seat themselves.

Walter
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Old 09-29-2012, 07:37 PM   #3
jaredtowne OP
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thanks for the response, I sent xrsonly a email asking about prices and turn around time,... This is the response I recieved ; (exact copy & paste)


Quote:
R&r VALVE SEAT IS 60.00 EACH..20.00 A HOLE FOR A 3-ANGLE VALVE JOB.

My email I sent ;

Quote:
Hello, I am interested in having some work done on an 87 xr600 head. one of the exhaust valve seats has cracked and lost a chip. I have no place locally who can do this for me, and was referred to you from a forum.

All I am interested in is shipping the head to you and having that seat taken out, and a new one pressed in. You would receive the bare head, no valves or springs.

What would the price be for the one, or if I had you do all of them (4) .

And what is the turn-around time?

Thank you!

Not a good start, I guess they answered one of my questions,, I didnt ask about the 3 angle job...

I replied asking if there was a phone number I could call to speak with someone.. Hopefully that works better..
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Old 09-29-2012, 09:26 PM   #4
Walterxr650l
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Quote:
Originally Posted by jaredtowne View Post
This is the response I recieved ; (exact copy & paste)


R&r VALVE SEAT IS 60.00 EACH..20.00 A HOLE FOR A 3-ANGLE VALVE JOB.


Not a good start, I guess they answered one of my questions,, I didnt ask about the 3 angle job...

I replied asking if there was a phone number I could call to speak with someone.. Hopefully that works better..
Stop and think about it for a minute. How much good will a new valve seat do you if you don't get the seat cut?

Their phone number is right at the top of their web page. http://www.xrsonly.com/

Walter
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Old 09-29-2012, 11:04 PM   #5
The Letter J
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Personally, I would at the bare minimum replace the 1 bad seat and all 4 valves along with cutting all 4 seats at the same time. It's not like pulling the head off is routine maintenance on the big XR's so it makes sense to me to do it all now and forget about it for a few years. My local machine shop charged me $40 to cut 4 seats.
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Old 10-01-2012, 11:20 AM   #6
Mongle
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Quote:
Originally Posted by jaredtowne View Post
thanks for the response, I sent xrsonly a email asking about prices and turn around time,... This is the response I recieved ; (exact copy & paste)





My email I sent ;




Not a good start, I guess they answered one of my questions,, I didnt ask about the 3 angle job...

I replied asking if there was a phone number I could call to speak with someone.. Hopefully that works better..

Removing and installing a seat is one operation. That doesn't mean it is ready to run. The seat then needs to be cut for the 3 angles and fit to the valves. I don't do motorcycle heads but their prices seem kind of high. I get $30 a seat to remove and replace and $18 a seat for 3 angle valve job (which includes resurfacing valves). I don't think I have cutters small enough for a motorcycle head. What size is the exhaust valve head?
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Old 10-01-2012, 11:39 AM   #7
cyclewizard
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Quote:
Originally Posted by Walterxr650l View Post
Send a PM to cyclewizard and see if he does them. If he doesn't then XRsonly my be your only option. Honda doesn't sell replacement seats, so anybody that does it will have to be able to manufacture the seat themselves.

Walter

I have bronze and powered metal seats for the XR's.......if one fell out the others will follow.
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Old 10-01-2012, 11:45 AM   #8
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Quote:
Originally Posted by Mongle View Post
Removing and installing a seat is one operation. That doesn't mean it is ready to run. The seat then needs to be cut for the 3 angles and fit to the valves. I don't do motorcycle heads but their prices seem kind of high. I get $30 a seat to remove and replace and $18 a seat for 3 angle valve job (which includes resurfacing valves). I don't think I have cutters small enough for a motorcycle head. What size is the exhaust valve head?

31mm's and the stem is 6.6mm's
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Old 10-01-2012, 12:05 PM   #9
Mongle
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Quote:
Originally Posted by cyclewizard View Post
31mm's and the stem is 6.6mm's
Yep, no cutters that small. Probably takes a 32 or 33 mm seat.

Cyclewizard,

I think he said a piece boke off it-not fell out. But, if it did fall out i'm with you. That would be a sign of overheat and would mean the seats lost their press fit.
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Old 10-02-2012, 05:34 AM   #10
cyclewizard
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Quote:
Originally Posted by Mongle View Post
Yep, no cutters that small. Probably takes a 32 or 33 mm seat.

Cyclewizard,

I think he said a piece boke off it-not fell out. But, if it did fall out i'm with you. That would be a sign of overheat and would mean the seats lost their press fit.
Yeah you're right, usualy they fall out....I would replace them all though just to be safe.
.0055 or even better .007 fit..
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Old 12-10-2012, 07:56 PM   #11
jaredtowne OP
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cyclewizard, the seat is still in place, a small chunk of the seat actually broke and fell out, the rest of the seat is still firmly in place.

Here is a photo
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Old 12-10-2012, 08:02 PM   #12
jaredtowne OP
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I guess I was just confused is all, I am new to all this valves and head work. typically never had to mess with em. I didnt realized they had to be cut for any reason.

The valves look okay? they should be replaced?

cyclewizard, what are your rates for solving this issue for me? If i send you the head (and whatever else I needed.. maybe valves so you can lap them??) or whatever needs to be done.

Just like most people, this is on a fixed income.. So I dont want to replace stuff just because "i have it apart". Most likely if I decide to keep the bike another season more extensive engine work will follow next winter just to open it up.

XRS couldnt really give me a turn around time, and the guy I talked to on the phone really didnt want to take any time to figure out the best solution. Not trying to bad mouth anyone, I know they are a busy shop...
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Old 12-10-2012, 09:37 PM   #13
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Take it to the local auto machine shop and get a list of what they need.
Order the parts on line, if it Japanese do a search for cheap parts, you will need seals, guides and seats(worst case), probably the valves will go another time, your rebuilder will tell you what it is.

Don't take in any bullshit or get robbed, a valve is valve, Chevy or motorcycle,
any tech in an auto rebuilder's shop can do your work. It's just a valve to them.

They will need to know if you are air cooled or water cooled.
bill
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