Suzuki2Strokes.com

Sundial Moto Sports

Suzuki Two-Stroke Message Board
Suzuki2Strokes.com
It is currently Wed Mar 20, 2019 2:07 am

All times are UTC - 6 hours




Post new topic Reply to topic  [ 36 posts ]  Go to page 1, 2, 3  Next
Author Message
PostPosted: Mon Dec 17, 2018 2:24 am 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
Well not totally it sounded nice and quiet but only run a few minutes and smoked awfully ,I thought I could get away with just the outer seals renewing but lots of gearbox oil came out of crankcase drain bolts. So complete strip down again! I was a bit dubious of the seals i got from robinsons they seemed a bit harder than the ones I took off and had turned a bit grey also the big o rings were skinnier and not in a genuine packet so buying elsewhere this time.Does it matter which side crank you split to get at the centre seals ? So I can leave one big end undisturbed.


Top
 Profile  
 
PostPosted: Mon Dec 17, 2018 7:32 am 
Offline
To the on ramp

Joined: Fri Aug 11, 2017 7:09 am
Posts: 346
Country: england
Bikes owned: several gt250 ramairs
hi mate, it doesn't really matter which side you take off, they're both as awkward :D alpha sports have middle seals for the t500 at about $30 plus post for the pair, but try phoning sep in kegworth first and see if they have any in stock.
cheers, dd.

_________________
GTS250 road registered. TS250 engine, Ramair frame.
GT250 big bang road registered. Both pistons fire the same time. USD forks.
GT285 road registered. Overbored - 58mm and TS125 +2 pistons fitted.
GT10 road registered. '65 T10 engine, GT250 frame.


Top
 Profile  
 
PostPosted: Mon Dec 17, 2018 2:22 pm 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
Great thanks ,what's the awkward part ? I've done a load of rd cranks but they're splined also did a h1 triple and it even revved smoothly to 8500 God knows how I trued that one up! i know it took a while . Also once spark plugs have oiled up are they knackered for good or will washing in petrol revive them ? I oiled about 6 up before I realised it wasn't going to clear.


Top
 Profile  
 
PostPosted: Mon Dec 17, 2018 2:37 pm 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 241
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Splant wrote:
Well not totally it sounded nice and quiet but only run a few minutes and smoked awfully ,I thought I could get away with just the outer seals renewing but lots of gearbox oil came out of crankcase drain bolts. So complete strip down again! I was a bit dubious of the seals i got from robinsons they seemed a bit harder than the ones I took off and had turned a bit grey also the big o rings were skinnier and not in a genuine packet so buying elsewhere this time.Does it matter which side crank you split to get at the centre seals ? So I can leave one big end undisturbed.
Not something I would attempt my self but aside from the witness marks you will be making, here are crankshaft dimensions as a back up if you have not seen them and if needed ....scroll down a bit :arrow: http://www.ozebook.com/compendium/techb ... %206-9.pdf"

Good Luck

_________________
_____________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Mon Dec 17, 2018 4:07 pm 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 241
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Too bad about the seals but at least you can add that missing tachometer gear washer you mentioned in another thread.

I would also replace the kickstarter pawl also while you have it apart....tiny chip or even slight wear on that $4.00 part could mean no joy when you go to use the kickstarter one day.....been there....done that and I always keep a couple of spares including the pin and spring.

Just sayin...

_________________
_____________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 8:32 am 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
Great tips it did slip a couple of times when kicking it over 100 times ,for some reason the plug leads needed swapping over must have mounted them wrongly, must need leads coming out the rear not the front ? ,glad I didn't strip it for them shims before as well , cheers all. Let you know how i get on with the crank ,bought a bearing splitter but they never look to be thin enough to get behind the bearings,soon see.


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 10:54 am 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 241
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Yes, the HT leads face forward coming out and crossover.... rightside fires left side and vice versa.

There is a thread or a blog about a setup for splitting the crank a fellow made. I thought it was in the Muzza's ozebrook site but maybe not. I could not find it on a quick search yesterday. Perhaps someone else knows what I'm talking about and can post it but maybe you can have success with the way you plan on doing it.

You did seal the mating surfaces of the crankchamber's back wall very well...correct? Gear oil could get sucked into the chamber via even a small breech.

_________________
_____________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 11:28 am 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
Yes coated top and bottom cases with threebond ,I saw a thread myself somewhere about rebuilding a crank it looked very complicated plates and long bolts everywhere ,hope i don't need all that . On yamahas they have a rubber ring that goes behind the pinion gear nut in the keeway slot .I'm wondering whether oil can get sucked through there ?


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 11:53 am 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 241
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Yes, that's the crank splitting set up I was talking about. You're right, the set up was a little 'intense'.

About the pinion gear/woodruff key issue....been to long...trying to picture the set up but as long as all the parts are there, not damaged and configured correctly, I can't think of a problem that would arise.

Very good chance that the center crank seals are toast as you suspect.

I've had my crankshaft rebuilt twice for center seals in the twenty five years I've owned the T500.

Edit; I'm still 'on the fence' as far as using some possibly too hard/too aged OEM seals or pattern/reproduction fresh seals next time.....that is if they are in fact pattern and fresh..... :|

_________________
_____________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 2:07 pm 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
I,ll put some blue hylomar under the washer to be certain,anyhow couldn't wait for my bearing splitter ,that probably be useless anyhow and used screwdrivers to remove bearings, tapped either side then claw hammers opposite each over.
I've a 12 ton press with a 20 ton bottle Jack swapped over,and it took all 20 tons to push the centre pin out . Worst side seal just fell out once circlip removed,it would be leaking more around the edge than the centre of the seal .then screwdrivers and claw hammers plus blowlamp to pull centre bearing off ,other side not as bad but still can rock it on the centre shaft .It's amazing it started and ran really.
Hardest parts putting it all back though ,the press kind of jolts to far when pressing the things together,and it's a heavy bugger have on my knee hammering to true it. It's weird how finding knackered parts is so rewarding. Pawl and kickstart spring ordered.


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 3:36 pm 
Offline
To the on ramp
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 241
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Splant wrote:
................Hardest part is putting it all back though ,the press kind of jolts to far when pressing the things together,and it's a heavy bugger have on my knee hammering to true it..............Pawl and kickstart spring ordered.
Getting a little "awkward" is it? :wink: Sounds like you can handle it though.

Are you talking about the kickstart pawl spring or the kickstart shaft return spring? I would go ahead and replace the pawl spring and the pin even if there is only the faintest sign of wear on the end of the pin. You should have all the 'meat' you can in these parts since it's hard to tell if the teeth inside the ratchet gear are worn .....nothing to compare them to.....the gear is no longer available from Suzuki so better to have that new 'sacrificial' inexpensive pawl and it's counterparts.

If you are talking about replacing the kickstart return spring...that's good or at least inspect it to see if the end that goes in the shaft is showing signs of a potential break very close (just a few mm) the to end of the spring. I have replaced that spring twice because the very end broke off. Once long ago and once not so long ago but that was when I was when I was doing an exorbitant amount of riding and I still ride the T500 some almost every day of the year. I think next time I have the engine apart I will tame the sharp rim of the shaft hole just a hair. That may had contributed to the break also...maybe not.

Anyway, again, Good Luck. Sounds like you are moving right along. :up:

_________________
_____________
______________________
_______________________________
GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 4:10 pm 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
Yes happy how it's going so far ,just waiting on the seals from u.s. £21 ,oem. No didn't get the pawl spring ,just the big one as mine was rusty in parts I,ll try amend order before they send them to include the small one and pin, I,d recommend everyone buy a press its been so useful .


Top
 Profile  
 
PostPosted: Tue Dec 18, 2018 5:45 pm 
Offline
On the main road

Joined: Thu Nov 07, 2013 1:59 pm
Posts: 137
Country: United Kingdom
Bikes owned: A100 GT250 & 4t Yams!
dorT500 wrote:
Yes, the HT leads face forward coming out and crossover.... rightside fires left side and vice versa.



Apologiess for brief hi-jack.. Is this ^^ true for all twins inc GT250? Ta.


Top
 Profile  
 
PostPosted: Wed Dec 19, 2018 12:46 am 
Offline
Around the block

Joined: Thu Oct 11, 2018 2:27 pm
Posts: 62
Location: Stoke england
Country: United Kingdom
Bikes owned: Yr5 t500j
It's bonkers isn't it ,worth a try if it won't start and if you've got a spark and plugs are getting wet .


Top
 Profile  
 
PostPosted: Wed Dec 19, 2018 7:22 am 
Offline
Moto GP
User avatar

Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3321
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Suzuki varied the coil mounting on the twins. On some the HT leads face the front while on others they face the rear.
Take a close looks at the pics on SuzukiCycles.org & you’ll see it.

I just much sure that the left points fires the left plug when I’m not sure if its correct.

_________________
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 36 posts ]  Go to page 1, 2, 3  Next

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 43 guests


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 post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
Sundial Moto Sports forum © by Eric F. Kalamaja
Suzuki2Strokes.com