Well, she finally puked her guts out.... (pic) - Page 3

derbydave · 03-14-2017, 07:18 PM

Does it make noise revving the engine in neutral or does it need to be under load

spldart · 03-14-2017, 08:40 PM

Both under load and not. Same sound.
Idle normal.

spldart · 03-15-2017, 12:11 AM

Oki doki:
I have finished cleaning the old cylinder and piston, etc...
They don't look to bad.
I'm gonna tear the motor back down tomorrow and reassemble with the old suzuki parts and the new chinese gaskets that came with the cyl/bore kit.
I'll let yah know what happens.
Should know by tomorrow eve if the problem is the Alibada GN/GZ250 kit or I have something else humped.
When I was torn down I had no play in the connecting rod both ends... Maybe the crank or maybe the kit.

derbydave · 03-15-2017, 10:55 AM

How is your timing chain tensioner? that could cause noise when the engine is revved up.

spldart · 03-15-2017, 11:07 AM

Chain tensioner seemed in great condition.
I'm kinda aimed at either something starved for oil briefly, only 300 cc were left when the motor stared dumping oil, or the rebuild kit failed me.

spldart · 03-15-2017, 09:01 PM

Ground down the area on the head and I tore the old head gasket apart to shim the new one and gain some deck height.
Light that fire tomorrow.

spldart · 03-15-2017, 10:33 PM

spldart · 03-15-2017, 10:35 PM

Is it just me or does the new Chinese cylinder have a thinner steel liner than the old Suzuki cylinder?

I seem to remember someone talking about boring these out for Kia pistons.
I seem to remember they were in the Philipines or Indonesia or something.
If they are dealing with the Chinese version of this engine then I'd say collecting
old US cylinders would definitely allow your options to increase.... increase.

spldart · 03-17-2017, 03:43 PM

I have a runner. Update later 8-)

spldart · 03-17-2017, 06:07 PM

Oki doke.
BTW I further cleaned those intake valves when I ground that rough spot on the head.
Taking apart the old head gasket and using on steel layer as a shim for the Chinese kit's
head gasket seems to have resolved my problem.

Tomorrow I do extensive test ride.

First impression of the chinese GN250 kit on us GZ250.

1)Deck height is WRONG. Base and head gaskets are to thin.
*fixed that by shimming the china head gasket with one piece of u.s. head gasket.

2)Steel sleeve in cylinder is thinner.
*I've seen worse. I doubt it would be much issue. But NO overbores for the china cylinder.
u.s. cyl could easily take 1mm or more. More if your nasty.

3)It took 4 assemblies of the engine to learn this information. But now I know it I'm thinking I would suggest the china kit for the $100 I paid for it knowing you will need to take a vernier caliper to the gaskets and shim them appropriately with a dismanteled original gasket.

03-14-2017, 07:18 PM	#21
derbydave Senior Member Join Date: Jan 2017 Location: KS Posts: 103	Does it make noise revving the engine in neutral or does it need to be under load __________________ 2003 Suzuki GZ250 (Sold) 1986 Suzuki Cavalcade LXE 1986 Suzuki Intruder VS700 Login or Register to Remove Ads
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03-15-2017, 12:11 AM	#23
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	Oki doki: I have finished cleaning the old cylinder and piston, etc... They don't look to bad. I'm gonna tear the motor back down tomorrow and reassemble with the old suzuki parts and the new chinese gaskets that came with the cyl/bore kit. I'll let yah know what happens. Should know by tomorrow eve if the problem is the Alibada GN/GZ250 kit or I have something else humped. When I was torn down I had no play in the connecting rod both ends... Maybe the crank or maybe the kit. Login or Register to Remove Ads
	0

03-15-2017, 10:55 AM	#24
derbydave Senior Member Join Date: Jan 2017 Location: KS Posts: 103	How is your timing chain tensioner? that could cause noise when the engine is revved up. __________________ 2003 Suzuki GZ250 (Sold) 1986 Suzuki Cavalcade LXE 1986 Suzuki Intruder VS700
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03-15-2017, 11:07 AM	#25
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	Chain tensioner seemed in great condition. I'm kinda aimed at either something starved for oil briefly, only 300 cc were left when the motor stared dumping oil, or the rebuild kit failed me. Login or Register to Remove Ads
	0

03-15-2017, 10:35 PM	#28
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	Is it just me or does the new Chinese cylinder have a thinner steel liner than the old Suzuki cylinder? I seem to remember someone talking about boring these out for Kia pistons. I seem to remember they were in the Philipines or Indonesia or something. If they are dealing with the Chinese version of this engine then I'd say collecting old US cylinders would definitely allow your options to increase.... increase. Last edited by spldart; 03-15-2017 at 10:41 PM.
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03-14-2017, 08:40 PM	#22
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	Both under load and not. Same sound. Idle normal.
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03-15-2017, 10:33 PM	#27
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604
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03-17-2017, 03:43 PM	#29
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	I have a runner. Update later 8-)
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03-17-2017, 06:07 PM	#30
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	Oki doke. BTW I further cleaned those intake valves when I ground that rough spot on the head. Taking apart the old head gasket and using on steel layer as a shim for the Chinese kit's head gasket seems to have resolved my problem. Tomorrow I do extensive test ride. First impression of the chinese GN250 kit on us GZ250. 1)Deck height is WRONG. Base and head gaskets are to thin. fixed that by shimming the china head gasket with one piece of u.s. head gasket. 2)Steel sleeve in cylinder is thinner. I've seen worse. I doubt it would be much issue. But NO overbores for the china cylinder. u.s. cyl could easily take 1mm or more. More if your nasty. 3)It took 4 assemblies of the engine to learn this information. But now I know it I'm thinking I would suggest the china kit for the $100 I paid for it knowing you will need to take a vernier caliper to the gaskets and shim them appropriately with a dismanteled original gasket.
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