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PostPosted: Sun Jul 29, 2018 12:59 pm 
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On the street
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Joined: Thu Jul 06, 2017 5:25 pm
Posts: 37
Country: Polska
Bikes owned: GT550
Bobf wrote:
Hi Tato - I have a NOS starter clutch part that your photos are showing as damaged. Happy to post it to you or put it on Ebay - my bike's clutch is the later one and I spent some time accumulating a few parts before stripping the engine to find which type it was, so it is surplus to requirements

Bob

I send you PM.


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PostPosted: Sun Jul 29, 2018 5:42 pm 
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Joined: Thu Feb 16, 2012 11:50 am
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Location: The Republic of South Yorkshire
Country: England
Bikes owned: GT550s GT750 GSX1400 and lots of spares
Hmmmmm. :roll:


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PostPosted: Tue Aug 14, 2018 6:44 pm 
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Around the block

Joined: Tue Jul 03, 2018 4:32 pm
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Country: Usa
Bikes owned: '74 GT250
Are the cylinders nikasil? I thought they were cast?


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PostPosted: Wed Aug 15, 2018 4:46 am 
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To the on ramp

Joined: Tue Mar 10, 2015 12:35 pm
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Location: Wales
Country: WALES
Bikes owned: suzuki gt 550j
L to B models destined for Europe were nykasil or SCEM plated and different ports

_________________
98 carb Blackbird and GT550j


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PostPosted: Wed Aug 15, 2018 11:41 am 
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Joined: Thu Feb 16, 2012 11:50 am
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Location: The Republic of South Yorkshire
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Bikes owned: GT550s GT750 GSX1400 and lots of spares
I recently found out there were some with schneurle ports (same as scem barrels) but with liners so they could be bored. Just fitted some 1mm oversize to a 550B and runs really nice.
Supposedly used in Germany? I will be inquiring regards these for more info.


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PostPosted: Fri Aug 17, 2018 12:00 am 
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Country: Polska
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Indy650 wrote:
Are the cylinders nikasil? I thought they were cast?

Yes, they are nikasil. My cylinders are flying to Japan, they will have Nikasil (scem) put in Japan. :D I have a friend who has been a motorcycle mechanic in Japan for seven years.

Guys, I got a part of the starter clutch. Thank you very much Bobf.
A new part, look:
Image
but I still need gear clutch starter :(


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PostPosted: Thu Sep 20, 2018 12:30 am 
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Country: Polska
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Is there a difference between 12620-34003 and 12620-34004? Can I use 12620-34004 if I had 12620-34003. Bulletin GT-26 does not say anything about it.

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PostPosted: Sat Sep 22, 2018 3:22 am 
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Location: The Republic of South Yorkshire
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Bikes owned: GT550s GT750 GSX1400 and lots of spares
Alan H wrote:
I recently found out there were some with schneurle ports (same as scem barrels) but with liners so they could be bored. Just fitted some 1mm oversize to a 550B and runs really nice.
Supposedly used in Germany? I will be inquiring regards these for more info.


http://www.pjme.co.uk/ are the people who do them.

I've just fitted a set to a friend's late 550 and so far so good - very quiet too. http://www.kettleclinic.co.uk/kcforum/v ... 517#p87517 and http://www.kettleclinic.co.uk/kcforum/v ... 16&t=11248 if anyone is bored.......


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PostPosted: Sat Sep 22, 2018 5:13 am 
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Still in the Driveway

Joined: Sun Jun 28, 2015 3:26 am
Posts: 4
Country: England
Bikes owned: GT550M
If it helps, my parts book for the J,K and L models shows 12620-34003 as the correct part number for the early clutch

Bob


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PostPosted: Sat Sep 22, 2018 6:10 am 
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Country: Polska
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They are the same. The only difference is that there are 2 oil grooves on the new one. The clutch basket is identical. One guy says, it was Suzuki trying to solve a design flaw by modifying it and eventually scrapping it and changing to Borg Warner.

Image

Image

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PostPosted: Sun Sep 23, 2018 3:16 am 
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Joined: Sun Jun 28, 2015 3:26 am
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Country: England
Bikes owned: GT550M
I'd use the new one, then, and you should be "good to go". Use a high quality synthetic or semi-synthetic motorcycle oil (for wet clutches) in the gearbox and it should last much better than "back in the day" - you may have no problems with it at all.


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PostPosted: Sun Sep 23, 2018 3:20 am 
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Bobf wrote:
...Use a high quality synthetic or semi-synthetic motorcycle oil (for wet clutches) in the gearbox and it should last much better than "back in the day" - you may have no problems with it at all...


I think so too :up:


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PostPosted: Sun Sep 23, 2018 3:52 am 
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Joined: Thu Feb 16, 2012 11:50 am
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Location: The Republic of South Yorkshire
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Bikes owned: GT550s GT750 GSX1400 and lots of spares
Usually, semi and especially full synthetic oils will just make the clutch slip on engines designed for 'old style' mineral oils.
Just use a decent oil as specc'ed in the original Suzuki manual - 'a good quality SAE 20w40 multigrade transmission oil is to be used'.
As 20w40 was fairly uncommon back in 1972 when I got my first GT550, we all tended o use 20w50 mineral oil and mostly still do.
Of course, anyone else can do exactly as they wish, clutch plates aren't that expensive.......


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