Valve Lapping or Grinding - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
» Main Menu

Discussion Forums
 » Twins
 » Tiger
 » General
 » RAT

Features
 » Blogs

Motorcycle.com Links

Contribute
 » Photo

Motorcycle Forums
» Insurance
» Sponsors
» Our Partners
»ATV Reviews
»Motorcycle Games

Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

Reply
 
LinkBack Thread Tools Display Modes
Old 12-13-2012, 06:47 AM   #11 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: 2009 Black Bonneville A1
 
m2MQP's Avatar
 
Join Date: Sep 2010
Location: Bristol, England
Posts: 551
I'd be temted to recommend anyone with a Serdi head cutter which can be seen here...

http://cylinderheadshop.com/bespoke-...ers/serdi-100/


http://cylinderheadshop.com/serdi-race-shops/
__________________
Ric
.
Riding a modern motorcycle because I eventually got tired of remembering what the good old days were really like.


Last edited by m2MQP; 12-13-2012 at 07:04 AM. Reason: extra link added
m2MQP is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-13-2012, 07:16 AM   #12 (permalink)
Senior Member
SOTP Vintage Series
Main Motorcycle: 03 T100
 
mikeinva's Avatar
 
Join Date: Mar 2007
Location: richmond va
Posts: 7,787
With that many miles you wont be able to just use rings the bores will more then likely be out some what.Theres nothing wrong with the 904 kits though in fact they have better pistons then the stock triumph pistons.Or you can just do the head and maybe you will be lucky.Keep in mind you may have worn oil rings causeing all your troubles.Its kind of a crap shoot with that many miles.
__________________
Why do I feel young on my bike
mikeinva is online now   Reply With Quote Quick reply to this message
Old 12-13-2012, 07:18 AM   #13 (permalink)
Senior Member
SOTP Vintage Series
Main Motorcycle: 03 T100
 
mikeinva's Avatar
 
Join Date: Mar 2007
Location: richmond va
Posts: 7,787
Quote:
Originally Posted by m2MQP View Post
I'd be temted to recommend anyone with a Serdi head cutter which can be seen here...

http://cylinderheadshop.com/bespoke-...ers/serdi-100/


http://cylinderheadshop.com/serdi-race-shops/
Yep thats the tool for the job but you still need someone that knows how to use it and understands the cam setup on these bikes.Also they have to have the right cutters for these heads if they have to buy cutters you wont want to pay there bill lol.
__________________
Why do I feel young on my bike

Last edited by mikeinva; 12-13-2012 at 07:20 AM.
mikeinva is online now   Reply With Quote Quick reply to this message
Old 12-13-2012, 07:32 AM   #14 (permalink)
Senior Member
Powerbike
Main Motorcycle: 2001 Bonnie
 
Join Date: Sep 2008
Location: Wokingham, Berks, UK
Posts: 341
Other Motorcycle: 2002 Bonnie
Extra Motorcycle: 1250 K8 Suzuki Bandit
Yep a Serdi is the machine for the job. Can't imagine thata half-decent operator won't have the correct cutter inserts to do the Triumph seats. As for resetting the installed valve height, should be no problem either it won't be the first OHC head they have seen. Is there a standard specification for this, I don't have my manual to hand. If the Serdi operator knows what they are doing they can lightly throat the port entrance to, giving a nice consistant size and shape, all with one set up. To be fair I think the top of the line Kwikway machine can do similar good work, its just that I have plenty of experience with the Serdi and so favour it.
Phil
fullplat1 is offline   Reply With Quote Quick reply to this message
Old 12-13-2012, 08:23 AM   #15 (permalink)
Senior Member
Formula Extreme
 
Join Date: Aug 2006
Location: augusta ks.
Posts: 744
with the head off, the shims are very easy. I have done valve jobs on my Alfa's and had them done. The first alfa I had blew a head gasket, and I took the head to a ferrari dealer to do the valves while it was off,. while the head is off, check for a ridge around the top of the cylinder, where the rings stop going up. that, and checking for scoreing or scratches in the cylinder, should tell you if the rings are ok, and whether you need to have the culinder bored or not.
cliff
__________________
2006 Bonnie Black
1980 Yamaha xs650 sold 4-30-2011
alfacliff is offline   Reply With Quote Quick reply to this message
Old 12-13-2012, 10:18 AM   #16 (permalink)
Senior Member
SuperBike
Main Motorcycle: '06 T100
 
Bron-Yr-Aur's Avatar
 
Join Date: Oct 2011
Location: Windber, PA (formerly Jax FL)
Posts: 1,666
Other Motorcycle: Kawasaki KXdirtshredder
Quote:
Originally Posted by conchscooter View Post
i am wondering about the rings but they seem fine. I had thought about a revote but then I wonder how much more stuff do I disturb? I am not into no note kits. I try to get high miles by keeping things standard.
Conch, an easy, familiar comparison would be a chain/sprocket combo. If you replace a chain and mate it to a worn sprocket, things don't match up and your chain won't even have half the life of one paired with a new sprocket, even though the chain is new. So Mikes point is, you may or may not just have to to minimal work at a small investment, but since, like the chain, the piston, rings, and bore all work together, even a bigger (non-stock) bore kit will most likely be more cost effective. It will last the longest. Yes a stock motor lasts a long time, but probably not with new and old parts mixed in there. And if a motor doesn't smoke, that doesn't necessarily mean there's not serious wear on the rings
__________________
(The artist formerly known as kreemsicleT100)

"Ya can't have 'no' in your heart. Life's a garden. Dig it." - Joe Dirt
"If y'ain't first, yer last." - Ricky Bobby
Bron-Yr-Aur Garage

Last edited by Bron-Yr-Aur; 12-13-2012 at 06:11 PM.
Bron-Yr-Aur is offline   Reply With Quote Quick reply to this message
Old 12-13-2012, 12:40 PM   #17 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: 01 Bonneville
 
Join Date: May 2011
Location: xxxxxxxxxx
Posts: 707
At anytime please feel free to comment...but just my 2 cents. I am assuming the bike ran fine and burned NO OIL PRIOR to the valve adjustment. Who did the valve adjustment? If the timing was not set properly the valves would make contact with the piston (interference engine) damaging the valve. Any scars on the piston? Do you have any photos of the damage?
DUCKMAN is offline   Reply With Quote Quick reply to this message
Old 12-13-2012, 03:40 PM   #18 (permalink)
Senior Member
SOTP Vintage Series
Main Motorcycle: 03 T100
 
mikeinva's Avatar
 
Join Date: Mar 2007
Location: richmond va
Posts: 7,787
Quote:
Originally Posted by fullplat1 View Post
Yep a Serdi is the machine for the job. Can't imagine thata half-decent operator won't have the correct cutter inserts to do the Triumph seats. As for resetting the installed valve height, should be no problem either it won't be the first OHC head they have seen. Is there a standard specification for this, I don't have my manual to hand. If the Serdi operator knows what they are doing they can lightly throat the port entrance to, giving a nice consistant size and shape, all with one set up. To be fair I think the top of the line Kwikway machine can do similar good work, its just that I have plenty of experience with the Serdi and so favour it.
Phil
I think there most be a spec allthough I have never seen one.But its easy to measure before removeing the old valves.depth gauge from spring seat to top of stem.Or to make sure its right put the cams in with buckets and shims then take some off the stem untill its right.but there are some not so good machine guys out there that if you give them the head and dont say anything they wont do that for you.The other thing is have the springs set up right allso,some of the young guys out there dont have a clue to setting up spring pressure.On the other alot of auto shops would not know what any of this should be ,thats why its better to have someone that has these motors figured out.
__________________
Why do I feel young on my bike
mikeinva is online now   Reply With Quote Quick reply to this message
Old 12-13-2012, 03:43 PM   #19 (permalink)
Senior Member
SOTP Vintage Series
Main Motorcycle: 03 T100
 
mikeinva's Avatar
 
Join Date: Mar 2007
Location: richmond va
Posts: 7,787
Quote:
Originally Posted by alfacliff View Post
with the head off, the shims are very easy. I have done valve jobs on my Alfa's and had them done. The first alfa I had blew a head gasket, and I took the head to a ferrari dealer to do the valves while it was off,. while the head is off, check for a ridge around the top of the cylinder, where the rings stop going up. that, and checking for scoreing or scratches in the cylinder, should tell you if the rings are ok, and whether you need to have the culinder bored or not.
cliff
you cant tell much about how the bore is by looking at it with your eye unless its real bad .It needs to be checked with a dial bore gauge to know what shape its in .
__________________
Why do I feel young on my bike
mikeinva is online now   Reply With Quote Quick reply to this message
Old 12-13-2012, 03:49 PM   #20 (permalink)
Senior Member
SOTP Vintage Series
Main Motorcycle: 03 T100
 
mikeinva's Avatar
 
Join Date: Mar 2007
Location: richmond va
Posts: 7,787
Not saying it will happen but what can happen to the rings with valves leaking they dont have as much stress on them as they do once you seal the valves up you put more compression on the old rings.If they are near worn out they can blow by.I know alot of these bikes go 100,000 miles but 70,000miles
is alot on a air cooled motor
__________________
Why do I feel young on my bike
mikeinva is online now   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Bedding/Lapping Piston Rings. Mr.Pete Vintage Technical Tips & Tricks 15 06-03-2014 03:01 PM
Valve cutting/grinding on T140 Aircool Classic, Vintage & Veteran 4 10-19-2012 08:51 PM
lapping valves. jimmy bush Vintage Technical Tips & Tricks 1 04-27-2009 04:51 PM
breaking(lapping) in a new engine dolson Maintenance Tips and Tricks for your Sprint 71 03-26-2009 04:04 PM
Grinding the pegs yes but grinding the exhaust? tazwolf Hinckley Classic Triples 17 10-01-2005 08:34 AM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 10:12 AM.



Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

Search Engine Optimization by vBSEO 3.6.0