Help & FAQs    Search BCF    Members    Groups    Events Calendar
Resend my activation email : Register : Log in 
BCF: Bike Chat Forums


Does it mater which year engine i get piston rings for?

 Reply to topic
Bike Chat Forums Index -> The Workshop
View previous topic : View next topic  
Author Message

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 21:34 - 01 Jul 2011    Post subject: Does it mater which year engine i get piston rings for? Reply with quote
TS250 engine, old style but i cant identify the year, would it matter if i just bought a set of like 1979 piston rings?
Im just working on the basis that a 250 piston is a 250 piston lol...

Plus.. Whats the item i have pointed to in the attached photo?


thanks.
 Back to top
View user's profile Send private message You must be logged in to rate posts

Frost
World Chat Champion



Joined: 26 May 2004
Karma :
PostPosted: 21:44 - 01 Jul 2011    Post subject: Reply with quote
Depends on the bore and stroke of the engine. So you can get some 250 pistons that are twice as wide as others.
Often they'll be lasted as say:
1979, 1983, 1988 etc where the year means the first year that engine were used, so if your bike is a 1980 you'd want the 1979 rings.

It's best to actually get the piston out and look at it before buying the rings as you have no way of knowing if it's running a standard size piston or an oversized one. Also it might need a new piston or a rebore so you might need to go a size up on rings and piston anyway
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

MarJay
But it's British!



Joined: 15 Sep 2003
Karma :
PostPosted: 21:45 - 01 Jul 2011    Post subject: Re: Does it mater which year engine i get piston rings for? Reply with quote
sandman1976 wrote:
TS250 engine, old style but i cant identify the year, would it matter if i just bought a set of like 1979 piston rings?
Im just working on the basis that a 250 piston is a 250 piston lol...

Plus.. Whats the item i have pointed to in the attached photo?


thanks.


Different year engines sometimes have a different bore and stroke. Also some might be liquid cooled and some might be air cooled which affects the tolerances. Different piston sizes are sometimes fitted to different bikes from the same year *at the factory* because of different maching tolerances.

Basically, I'd be very surprised if they fitted. Why not just buy the correct rings?

The 'thing' in your photo is a reed valve.
____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 21:57 - 01 Jul 2011    Post subject: Reply with quote
I would buy the rings but i dont know what im buying, no idea what year the engine is or anything, i posted a photo of the engine and asked a few days ago but no replies.

What does the reed valve do? i have only ever seen them on the inlet from a carb before...
Pic of the engine is attached if anyone can date it for me.

thanks.
 Back to top
View user's profile Send private message You must be logged in to rate posts
Blau Zedong This post is not being displayed because the poster is banned. Unhide this post / all posts.

BigGeeking
Scooby Slapper



Joined: 07 Jun 2011
Karma :
PostPosted: 03:10 - 02 Jul 2011    Post subject: Reply with quote
think its called a reed valve Very Happy
____________________
Bendy "Flip front. I can filter down the M4 while shoving a Twix in my face."
honda CG 125 2001 SOLD-- current Bandit 400--SOLD. current SV650s 2000
MOD 1 ON 20/7/2011**passed** MOD 2 ON 17/10/2011***passed***,,
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

temeluchus
World Chat Champion



Joined: 01 Oct 2008
Karma :
PostPosted: 07:32 - 02 Jul 2011    Post subject: Reply with quote
Just dont get confused and buy rings for an MZ ts250 X-)
____________________
Some shite cruiser. Now with guns and FREEDOM!
 Back to top
View user's profile Send private message Visit poster's website You must be logged in to rate posts

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 10:51 - 02 Jul 2011    Post subject: Reply with quote
Yea i was nearly taken in by the mz ts250 stuff!
I have the piston out but there are no numbers on it at all which i was hoping there would be, im trying to pickup on something that would distinguish the engine from other years at the moment.

What does that perticular reed valve do? as its not carb fed i cant figure its use..

Thanks.
 Back to top
View user's profile Send private message You must be logged in to rate posts

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 20:40 - 02 Jul 2011    Post subject: Reply with quote
Can you buy piston rings of just a measured size? Rather than trying to figure the date of the engine?
 Back to top
View user's profile Send private message You must be logged in to rate posts

nowhere.elysium
The Pork Lord



Joined: 02 Mar 2009
Karma :
PostPosted: 21:08 - 02 Jul 2011    Post subject: Reply with quote
There's an engraved number on the far side of the engine, that's obscured in the photo. What's the number? It may be possible to identify the year of manufacture from that.
____________________
'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project
 Back to top
View user's profile Send private message You must be logged in to rate posts

Blue_SV650S
World Chat Champion



Joined: 27 Nov 2008
Karma :
PostPosted: 21:18 - 02 Jul 2011    Post subject: Reply with quote
sandman1976 wrote:


What does that perticular reed valve do? as its not carb fed i cant figure its use..

Thanks.


It is exactly the same as one that sits on an inlet manifold behind the carb, this one is just further 'downstream'!

It purpose is to stop fuel charge from being blown back out of the carb.
____________________
The purpose of life is to fight maturity.
 Back to top
View user's profile Send private message You must be logged in to rate posts

kal9001
Trackday Trickster



Joined: 14 Aug 2005
Karma :
PostPosted: 00:06 - 03 Jul 2011    Post subject: Reply with quote
Blue_SV650S wrote:
sandman1976 wrote:


What does that perticular reed valve do? as its not carb fed i cant figure its use..

Thanks.


It is exactly the same as one that sits on an inlet manifold behind the carb, this one is just further 'downstream'!

It purpose is to stop fuel charge from being blown back out of the carb.


Pretty much what he said.

In a two stroke the downward movement of the piston causes high pressure in the crank area to push fuel/oil/air mixture into the top of the combustion camber ready for the next compression. this valve simply stops all the fuel/oil/air being pushed back out of the inlet and out of the carb instead.

As for your first question I may....in fact no, Im probably wrong in assuming that so long as the ring is the correct diameter for the bore and the correct thickness for the groves in the piston then it should be fine.
Am I right in thinking that 2t's only usually have two rings and 4t have three, the lowest 'extra' one being special in some way?
____________________
Anyone stupid enough to think we will drag a load of wooden horses full of soldiers into our city is certanley stupid enough to drag all of ours into theirs!
 Back to top
View user's profile Send private message You must be logged in to rate posts

Blue_SV650S
World Chat Champion



Joined: 27 Nov 2008
Karma :
PostPosted: 08:26 - 03 Jul 2011    Post subject: Reply with quote
kal9001 wrote:

Am I right in thinking that 2t's only usually have two rings and 4t have three, the lowest 'extra' one being special in some way?


The bottom one on a 4t is an 'oil scraper' ring ... kinda does what it says on the tin! i.e. unlike the top two, it is not there for compression, but to prevent crankcase oil from entering the combustion chamber.

With regard to the ring, you can determine year/model from the engine number. Presuming a gypsy hasn't ground it off at some point Thinking
____________________
The purpose of life is to fight maturity.
 Back to top
View user's profile Send private message You must be logged in to rate posts

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 16:10 - 03 Jul 2011    Post subject: Reply with quote
there are only two digits on the number panel, it just says TS lol.
Will there be a difference in piston size? because i have the piston out and could measure it.
 Back to top
View user's profile Send private message You must be logged in to rate posts

Andi.El
Derestricted Danger



Joined: 02 Jul 2011
Karma :
PostPosted: 19:54 - 03 Jul 2011    Post subject: Reply with quote
It is a direkt intake to the crankcase and opens before the piston opens tte intake port to increase the filling of the crankcase. Better filling=more power.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 11:06 - 04 Jul 2011    Post subject: Reply with quote
Ok its a 70mm piston, with 1.5mm wide rings, cant measure the ring diameter as they came out in pieces!
Any ideas from here?

Thanks.
 Back to top
View user's profile Send private message You must be logged in to rate posts

Andi.El
Derestricted Danger



Joined: 02 Jul 2011
Karma :
PostPosted: 19:11 - 04 Jul 2011    Post subject: Reply with quote
standart piston has 70,00 mm (2,76 in), the clearence between piston to cylinder is 0.06-0,07 mm (0,0024-0,0028 in). The oversize piston has 0,5 mm more. You pay about 200 € for a piston, piston ring set, piston pin, circlip, bearing and gaskets in Germany.
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts

DrDonnyBrago
World Chat Champion



Joined: 03 Jan 2010
Karma :
PostPosted: 11:03 - 05 Jul 2011    Post subject: Reply with quote
A little on reed valves:

https://www.dansmc.com/reedvalve.htm

I also recommend the rest of the site as an evening read. Some really good stuff in there for the amateur mechanic Thumbs Up .
 Back to top
View user's profile Send private message You must be logged in to rate posts

Robby
Dirty Old Man



Joined: 16 May 2002
Karma :
PostPosted: 12:37 - 05 Jul 2011    Post subject: Reply with quote
If the bike is vaguely original and hasn't been rebored, just call up your local friendly Suzuki garage with the frame number (on the V5) and they'll order them in for you. Probably more expensive than pattern ones, but a set of genuine rings for a 4 stroke 250 single from Honda is £30, so it won't be a big enough price difference to matter.
 Back to top
View user's profile Send private message You must be logged in to rate posts

sandman1976
Nova Slayer



Joined: 08 Apr 2011
Karma :
PostPosted: 20:48 - 05 Jul 2011    Post subject: Reply with quote
Robby wrote:
If the bike is vaguely original and hasn't been rebored, just call up your local friendly Suzuki garage with the frame number (on the V5) and they'll order them in for you. Probably more expensive than pattern ones, but a set of genuine rings for a 4 stroke 250 single from Honda is £30, so it won't be a big enough price difference to matter.


Yep done that - £84.60 for 2 rings from Suzukii ! ! LOL!
 Back to top
View user's profile Send private message You must be logged in to rate posts

Andi.El
Derestricted Danger



Joined: 02 Jul 2011
Karma :
PostPosted: 21:54 - 05 Jul 2011    Post subject: Reply with quote
https://www.cmsnl.com/suzuki-ts250-1977-1979-usa_model16301/partslist/86256.html
 Back to top
View user's profile Send private message Send e-mail You must be logged in to rate posts
Old Thread Alert!

The last post was made 14 years, 171 days ago. Instead of replying here, would creating a new thread be more useful?
  Display posts from previous:   
This page may contain affiliate links, which means we may earn a small commission if a visitor clicks through and makes a purchase. By clicking on an affiliate link, you accept that third-party cookies will be set.

Post new topic   Reply to topic    Bike Chat Forums Index -> The Workshop All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Read the Terms of Use! - Powered by phpBB © phpBB Group
 
Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.11 Sec - Server Load: 1.5 - MySQL Queries: 14 - Page Size: 109.38 Kb