Re-doin Valve Seats

Floki · February 1st, 2016, 09:46 AM

Is 160 to get them done a good deal?

Also, the clutch cover gasket gets replaced everytime the clutch cover comes off right?

bruce71198 · February 1st, 2016, 06:22 PM

are the replacing the seats or cutting them? I'll check what our local guy charges in the morning. If the gasket isn't ripped use it again.

Motofool · February 1st, 2016, 06:26 PM

Quote:

Originally Posted by Floki

Is 160 to get them done a good deal?

Also, the clutch cover gasket gets replaced everytime the clutch cover comes off right?

Are you fully opening the throttle during the compression tests?

Did you do a leak-down test?

http://www.dansmc.com/compression_test.htm

[url]http://www.dansmc.com/leakdown.htm[/url

Are you sure your low pressure comes from leaky valves?
Leaky rings or/and guides of valves?

Yes, the gasket gets ruined each time, unless you put grease on both sides of the gasket and it does not take too long to remove the cover again.

Floki · February 1st, 2016, 06:31 PM

Cutting them. And I'm pretty sure that's where the fault is. One of my intake valves on the faulty cylinder was .012in

choneofakind · February 1st, 2016, 08:21 PM

I mean... I've never looked into that because mine were in good shape, but that doesn't seem too bad for someone to do that work that has the proper reamers and setup for it.

You taking the head off and bringing it to them or are you delivering the bike and they're doing all the work?

Floki · February 1st, 2016, 08:34 PM

Already have the head off and boxed about. About to send it to HFD1 in Georgia

choneofakind · February 1st, 2016, 09:17 PM

Well look at it this way: most machine shops and motorcycle shops charge somewhere from 75-100 dollars per hour. That means your valve seat cutting job is expected to take somewhere around 1.5-2 hours. Does this seem fair to you? If so, then it's a good price.

That seems fair to me, considering that they're cutting multiple angles and they're doing 8 valve seats in about 2 hours. That's just me.

As for the clutch cover gasket: that's a paper gasket yes? If it's in good shape, get some good RTV (Yamabond or Threebond are two of the best for staying set up really well under oil and not getting gooey) and dress the gasket a little in RTV on assembly. Be careful not to goober it up in the case. If the gasket tears at all, replace it. Not worth the money to have to deal with drips.

bruce71198 · February 2nd, 2016, 04:45 PM

Our local guy charges $175 to do a single cylinder, 4 valve MX head. that includes setting the valve lash when done so $160 sounds real fare.

mgentz · February 3rd, 2016, 11:42 AM

APE Racing has decent prices as well....

APEmike · February 10th, 2016, 01:40 PM

Quote:

Originally Posted by mgentz

APE Racing has decent prices as well....

Thanks! lol

Just a heads up, angles aren't cut one at a time. The cutters are set up to cut them all in 1 go. The pain in the behind part is just getting everything lined up right. Thats why there isint a huge gap between a 4 valve head, and a 16 valve head. You can do all 8 on one side of a 4 cylinder nearly as fast as a 4 valve single because once you get the machine set up its a simple process of sliding over to the next hole. But the setup is the tricky, time consuming part...

And DONT get me started on the stupid Honda thing where they have 4 valves in a chamber all pointing different directions!!!

RacinNinja · February 10th, 2016, 01:41 PM

Quote:

Originally Posted by APEmike

Thanks! lol

Just a heads up, angles aren't cut one at a time. The cutters are set up to cut them all in 1 go. The pain in the behind part is just getting everything lined up right. Thats why there isint a huge gap between a 4 valve head, and a 16 valve head. You can do all 8 on one side of a 4 cylinder nearly as fast as a 4 valve single because once you get the machine set up its a simple process of sliding over to the next hole. But the setup is the tricky, time consuming part...

And DONT get me started on the stupid Honda thing where they have 4 valves in a chamber all pointing different directions!!!

RFVC heads.....ah, the 80's were good years, no?

APEmike · February 10th, 2016, 01:45 PM

Yeah, them... I forgot the acronym. Yeah, the bike was designed and first build in the 80s but its still produced. XR650. The TRX400ex uses the same design.

RacinNinja · February 10th, 2016, 01:47 PM

Quote:

Originally Posted by APEmike

Yeah, them... I forgot the acronym. Yeah, the bike was designed and first build in the 80s but its still produced. XR650. The TRX400ex uses the same design.

Really? That's surprising....I haven't torn in to a modern XR650 or 400EX. Figured they'd all have gone pentroof by now.

APEmike · February 10th, 2016, 02:13 PM

Yeah the XR has only changed plastics in the last 30 years. Maybe some minor bits here and there but most stuff is unchanged or interchangeable.

Case in point...http://www.partspitstop.com/oemparts...6-670/cylinder

Btw, save that site to your favorites. OEM Parts fiche for nearly every bike made in the last 40 years, including our ninjette. I never buy from there but it helps figuring out whats what, what to call something, where its located, or just to look at the inner workings of stuff.

RacinNinja · February 10th, 2016, 02:25 PM

Quote:

Originally Posted by APEmike

Yeah the XR has only changed plastics in the last 30 years. Maybe some minor bits here and there but most stuff is unchanged or interchangeable.

Case in point...http://www.partspitstop.com/oemparts...6-670/cylinder

Btw, save that site to your favorites. OEM Parts fiche for nearly every bike made in the last 40 years, including our ninjette. I never buy from there but it helps figuring out whats what, what to call something, where its located, or just to look at the inner workings of stuff.

Thanks! I also use Bikebandit.com which has fiches for everything (Including my 1972 XL250 race bike) as well as Ronayers.com. The problem with Bikebandit is they don't use factory part numbers but their fiches are super easy to navigate if you just need a blown up diagram.

bruce71198 · February 10th, 2016, 03:22 PM

Quote:

Originally Posted by APEmike

Thanks! lol

Just a heads up, angles aren't cut one at a time. The cutters are set up to cut them all in 1 go. The pain in the behind part is just getting everything lined up right. Thats why there isint a huge gap between a 4 valve head, and a 16 valve head. You can do all 8 on one side of a 4 cylinder nearly as fast as a 4 valve single because once you get the machine set up its a simple process of sliding over to the next hole. But the setup is the tricky, time consuming part...

And DONT get me started on the stupid Honda thing where they have 4 valves in a chamber all pointing different directions!!!

Don't leave out the 5 valve Yamaha's

RacinNinja · February 10th, 2016, 03:27 PM

Quote:

Originally Posted by bruce71198

Don't leave out the 5 valve Yamaha's

Eh, still not as bad as a Honda. Yamaha only requires three set ups for the three different planes. Honda is 4 planes no matter how you slice it.

APEmike · February 10th, 2016, 05:30 PM

Quote:

Originally Posted by bruce71198

Don't leave out the 5 valve Yamaha's

What I dont get about Yamaha Titanium valve engines is how they can get away with 20k valve lash intervals when other Titanium or steel engines (like ours) are all under 10k... Titanium is VERY soft and its only a hard coating that keeps them alive for any time at all. Must be coated in Unobtanium!

hfd1 tuner · February 10th, 2016, 08:00 PM

because they break before 20k.....I hate ti valves....great for short term sucks when it is time to do service work. Suzuki 1200.00 for just valves just stupid if you ask me.....

February 1st, 2016, 09:46 AM	#1
Floki Motorcycle Nurse? Name: Jacques Location: Gulf Coast Join Date: Sep 2013 Motorcycle(s): 2010 250R, 1998 Ducati 748L #77/100 Posts: 606	Re-doin Valve Seats Is 160 to get them done a good deal? Also, the clutch cover gasket gets replaced everytime the clutch cover comes off right?

February 10th, 2016, 01:45 PM	#12
APEmike ninjette.org member Name: Michael Location: Tehachapi, CA Join Date: Oct 2014 Motorcycle(s): 2014 Ninja 300 Posts: 160	Yeah, them... I forgot the acronym. Yeah, the bike was designed and first build in the 80s but its still produced. XR650. The TRX400ex uses the same design. __________________________________________________ I ride because therapy is too expensive, and less fun.

February 10th, 2016, 02:13 PM	#14
APEmike ninjette.org member Name: Michael Location: Tehachapi, CA Join Date: Oct 2014 Motorcycle(s): 2014 Ninja 300 Posts: 160	Yeah the XR has only changed plastics in the last 30 years. Maybe some minor bits here and there but most stuff is unchanged or interchangeable. Case in point...http://www.partspitstop.com/oemparts...6-670/cylinder Btw, save that site to your favorites. OEM Parts fiche for nearly every bike made in the last 40 years, including our ninjette. I never buy from there but it helps figuring out whats what, what to call something, where its located, or just to look at the inner workings of stuff. __________________________________________________ I ride because therapy is too expensive, and less fun.

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February 1st, 2016, 06:22 PM	#2
bruce71198 ninjette.org sage Name: bruce Location: northern illinois Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999	are the replacing the seats or cutting them? I'll check what our local guy charges in the morning. If the gasket isn't ripped use it again.

February 1st, 2016, 06:31 PM	#4
Floki Motorcycle Nurse? Name: Jacques Location: Gulf Coast Join Date: Sep 2013 Motorcycle(s): 2010 250R, 1998 Ducati 748L #77/100 Posts: 606	Cutting them. And I'm pretty sure that's where the fault is. One of my intake valves on the faulty cylinder was .012in

February 1st, 2016, 08:21 PM	#5
choneofakind ninjette.org certified postwhore Name: . Location: . Join Date: Feb 2011 Motorcycle(s): . Posts: Too much. MOTM - Feb '13, Feb '14	I mean... I've never looked into that because mine were in good shape, but that doesn't seem too bad for someone to do that work that has the proper reamers and setup for it. You taking the head off and bringing it to them or are you delivering the bike and they're doing all the work?

February 1st, 2016, 08:34 PM	#6
Floki Motorcycle Nurse? Name: Jacques Location: Gulf Coast Join Date: Sep 2013 Motorcycle(s): 2010 250R, 1998 Ducati 748L #77/100 Posts: 606	Already have the head off and boxed about. About to send it to HFD1 in Georgia

February 1st, 2016, 09:17 PM	#7
choneofakind ninjette.org certified postwhore Name: . Location: . Join Date: Feb 2011 Motorcycle(s): . Posts: Too much. MOTM - Feb '13, Feb '14	Well look at it this way: most machine shops and motorcycle shops charge somewhere from 75-100 dollars per hour. That means your valve seat cutting job is expected to take somewhere around 1.5-2 hours. Does this seem fair to you? If so, then it's a good price. That seems fair to me, considering that they're cutting multiple angles and they're doing 8 valve seats in about 2 hours. That's just me. As for the clutch cover gasket: that's a paper gasket yes? If it's in good shape, get some good RTV (Yamabond or Threebond are two of the best for staying set up really well under oil and not getting gooey) and dress the gasket a little in RTV on assembly. Be careful not to goober it up in the case. If the gasket tears at all, replace it. Not worth the money to have to deal with drips.

February 2nd, 2016, 04:45 PM	#8
bruce71198 ninjette.org sage Name: bruce Location: northern illinois Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999	Our local guy charges $175 to do a single cylinder, 4 valve MX head. that includes setting the valve lash when done so $160 sounds real fare.

February 3rd, 2016, 11:42 AM	#9
mgentz Board Member Name: ... Location: WI Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.	APE Racing has decent prices as well....

February 10th, 2016, 08:00 PM	#19
hfd1 tuner ninjette.org member Name: charles Location: Sugar Hill GA. Join Date: Feb 2016 Motorcycle(s): many mostly racebikes cbr565 fzr490 ex250ish Posts: 40	because they break before 20k.....I hate ti valves....great for short term sucks when it is time to do service work. Suzuki 1200.00 for just valves just stupid if you ask me.....