Replaced the valve seals on the GZ with some pics

Road_Clam · 10-21-2012, 11:38 AM

Hi people, finally got around to replacing the valve seals on my wife's GZ. I had been having some issues with a ploom of blue smoke after a cold start up of the bike. The longer the bike sat between runnings, the worse the smoke was. As a generall rule of thumb, when you have some initial smoking but it stops after a short period, and does not continually smoke that's usually bad valve seals. When you have smoking under acceleration all the time , that's usually bad piston rings . So I did a top end teardown and inspection, and the piston didn't look overly caked up with carbon. So upon further dissasembly of the cyl head I now started to see some excessive carbon built up on the valves. A close inspection of the valve seals also IMO they looked dry and hard. Suzuki must have also seen an issue with the valve seals as the new superseded p/n ones I ordered were a totally different material and a slightly different design. So assemble was pretty straight foreward with the help of the online service manual (THANK YOU GZ250BIKE.COM !) . I made a few minor assembly mistakes that are not spelled out in the manual, but in the end she's all back together, and running awesome !

The green seal in this pic is the updated seal. The OEM seal was a black rubber seal. The updated green seal also has a small wire ring at the top that applies pressure around the valve stem boss.

All done, and the wife getting some seat time practice !

Rookie Rider · 10-21-2012, 06:17 PM

Great job and thank you. Pictures are always a plus

**jonathan180iq** · 10-23-2012, 11:34 AM

Awesome.

northsidegz · 10-24-2012, 08:45 PM

Sweet! Thanks for posting.

Water Warrior 2 · 10-29-2012, 05:03 AM

Well done. The mention and description of the updated seals is an added bonus for every rider/wrencher. :2tup: :2tup:

10-21-2012, 11:38 AM	#1
Road_Clam Senior Member Join Date: Feb 2012 Location: sounthern NH Posts: 146	Replaced the valve seals on the GZ with some pics Hi people, finally got around to replacing the valve seals on my wife's GZ. I had been having some issues with a ploom of blue smoke after a cold start up of the bike. The longer the bike sat between runnings, the worse the smoke was. As a generall rule of thumb, when you have some initial smoking but it stops after a short period, and does not continually smoke that's usually bad valve seals. When you have smoking under acceleration all the time , that's usually bad piston rings . So I did a top end teardown and inspection, and the piston didn't look overly caked up with carbon. So upon further dissasembly of the cyl head I now started to see some excessive carbon built up on the valves. A close inspection of the valve seals also IMO they looked dry and hard. Suzuki must have also seen an issue with the valve seals as the new superseded p/n ones I ordered were a totally different material and a slightly different design. So assemble was pretty straight foreward with the help of the online service manual (THANK YOU GZ250BIKE.COM !) . I made a few minor assembly mistakes that are not spelled out in the manual, but in the end she's all back together, and running awesome ! The green seal in this pic is the updated seal. The OEM seal was a black rubber seal. The updated green seal also has a small wire ring at the top that applies pressure around the valve stem boss. All done, and the wife getting some seat time practice ! __________________ 1984 GPz1100 1987 GSX-R 750 2006 HD Fatboy 2001 KX500 2007 YZ450F 2001 GZ250 (Wife's !) Login or Register to Remove Ads
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10-21-2012, 06:17 PM	#2
Rookie Rider Senior Member Join Date: Jun 2011 Location: Queens, NYC Posts: 1,263	Re: Replaced the valve seals on the GZ with some pics Great job and thank you. Pictures are always a plus
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10-23-2012, 11:34 AM	#3
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Re: Replaced the valve seals on the GZ with some pics Awesome. Login or Register to Remove Ads
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10-24-2012, 08:45 PM	#4
northsidegz Senior Member Join Date: May 2012 Location: Minneapolis Posts: 305	Re: Replaced the valve seals on the GZ with some pics Sweet! Thanks for posting. __________________ 1982 Suzuki GS450 Bobber (SOLD) 2000 Suzuki GZ250 (SOLD) 1998 Kawasaki Vulcan 800A (Present Ride)
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10-29-2012, 05:03 AM	#5
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: Replaced the valve seals on the GZ with some pics Well done. The mention and description of the updated seals is an added bonus for every rider/wrencher. :2tup: :2tup: Login or Register to Remove Ads
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